SUPREP Bowel Prep

6 ADVERSE REACTIONS Most common adverse reactions are: Adults (>2%): overall discomfort, abdominal distention, abdominal pain, nausea, and vomiting. ( 6.1 ) Pediatric Patients (>10%): nausea, abdominal pain, abdominal bloating and vomiting. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Braintree Laboratories, Inc. at 1-800-874-6756 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . The following important adverse reactions for bowel preparations are described elsewhere in the labeling: Serious Fluid and Serum Chemistry Abnormalities [see Warnings and Precautions ( 5.1 )] Cardiac Arrhythmias [see Warnings and Precautions ( 5.2 )] Seizures [see Warnings and Precautions ( 5.3 )] Use in Patients with Risk of Renal Injury [see Warnings and Precautions ( 5.4 )] Colonic Mucosal Ulceration and Ischemic Colitis [see Warnings and Precautions ( 5.5 )] Patients with Significant Gastrointestinal Disease [see Warnings and Precautions ( 5.6 )] Aspiration [see Warnings and Precautions ( 5.7 )] 6.1 Clinical Studies Experience Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in clinical studies of another drug and may not reflect the rates observed in practice. Adults The safety of SUPREP Bowel Prep Kit was evaluated in a multi-center, randomized, active controlled trial in 379 adult patients undergoing colonoscopy [see Clinical Studies ( 14 )] . Most Common Adverse Reactions Table 1 shows the most common adverse reactions reported in at least 2% of patients receiving SUPREP Bowel Prep Kit or the control (a bowel prep containing polyethylene glycol and electrolytes (PEG + E)) administered in split-dose (2-day) regimens. Table 1: Common Adverse Reactions* in Adult Patients Undergoing Colonoscopy in a Randomized, Active Controlled Trial * reported in at least 2% of patients Symptom Split-Dose (2-Day) Regimen SUPREP % N=190 PEG + E product % N=189 Overall Discomfort 54 67 Abdominal Distension 40 52 Abdominal Pain 36 43 Nausea 36 33 Vomiting 8 4 Laboratory Abnormalities Table 2 shows the most common laboratory abnormalities (at least 10% in either treatment group and more than 2% difference between groups) for patients who developed new abnormalities of important electrolytes and uric acid after completing the bowel preparation with either SUPREP Bowel Prep Kit or PEG+E administered as a split-dose (2-day) regimen. Table 2: Adult Patients with Normal Baseline Serum Chemistry with A Shift to an Abnormal Value While on the Split-Dose (2-Day) Regimen 1 1 The study was not designed to support comparative claims for the laboratory abnormalities reported in this table. 2 Percent (n/N) of patients where N=number of patients with normal baseline who had abnormal values at the timepoint(s) of interest. Day of Colonoscopy N (%) 2 Day 30 N (%) 2 Bicarbonate (low) SUPREP 20 (13) 7 (4) PEG + Electrolytes 24 (15) 4 (3) Bilirubin, total (high) SUPREP 14 (9) 0 (0) PEG + Electrolytes 20 (12) 3 (2) BUN (high) SUPREP 2 (2) 14 (11) PEG + Electrolytes 4 (3) 19 (15) Calcium (high) SUPREP 16 (10) 8 (5) PEG + Electrolytes 6 (4) 6 (4) Chloride (high) SUPREP 4 (2) 6 (4) PEG + Electrolytes 20 (12) 6 (4) Osmolality (high) SUPREP 8 (6) NA PEG + Electrolytes 19 (13) NA Uric acid (high) SUPREP 27 (24) 13 (12) PEG + Electrolytes 12 (10) 20 (17) Less Common Adverse Reactions AV Block (1 case) and CK increase. Adverse Reactions with Unapproved Use In another study of 408 adult patients, higher rates of the following adverse reactions and laboratory abnormalities were reported in patients treated with SUPREP Bowel Prep Kit as an evening-only (1-day) regimen compared to the split-dose (2-day) regimen. overall discomfort, abdominal distention, nausea, and vomiting total bilirubin (high), BUN (high), creatinine (high), osmolality (high), potassium (high) and uric acid (high) Administration of SUPREP Bowel Prep Kit in an evening-only (1-day) dosing regimen is not recommended. Pediatrics 12 Years to 16 Years of Age The safety of SUPREP Bowel Prep Kit was evaluated in a single dose-ranging clinical trial of 89 pediatric patients aged 12 years to 16 years [see Clinical Studies ( 14 )] . In 26 pediatric patients who received SUPREP Bowel Prep Kit (two 4.5-ounce doses), the most common adverse reactions (> 10%) were nausea, abdominal pain, abdominal bloating, and vomiting.

4 CONTRAINDICATIONS SUPREP Bowel Prep Kit is contraindicated in the following conditions: Gastrointestinal obstruction or ileus [see Warnings and Precautions ( 5.6 )] Bowel perforation [see Warnings and Precaution ( 5.6 )] Toxic colitis or toxic megacolon Gastric retention Hypersensitivity to any of the ingredients in SUPREP Bowel Prep Kit Gastrointestinal obstruction or ileus ( 4 , 5.6 ) Bowel perforation ( 4 , 5.6 ) Toxic colitis or toxic megacolon ( 4 ) Gastric retention ( 4 ) Hypersensitivity to any ingredient ( 4 )

11 DESCRIPTION SUPREP Bowel Prep Kit (sodium sulfate, potassium sulfate, and magnesium sulfate) oral solution (for adults) is an osmotic laxative and is provided as two bottles each containing 6 ounces of solution. Each bottle contains: 17.5 grams sodium sulfate, 3.13 grams potassium sulfate, and 1.6 grams magnesium sulfate. Inactive ingredients include: citric acid USP, flavoring ingredients, malic acid FCC, sodium benzoate, NF, sucralose, purified water, USP. SUPREP Bowel Prep Kit (sodium sulfate, potassium sulfate, and magnesium sulfate) oral solution (for pediatric patients 12 years of age and older) is an osmotic laxative and is provided as two bottles each containing 4.5 ounces of solution. Each bottle contains: 13.13 grams sodium sulfate, 2.35 grams potassium sulfate, and 1.2 grams magnesium sulfate. Inactive ingredients include: citric acid USP, flavoring ingredients, malic acid FCC, sodium benzoate, NF, sucralose, purified water, USP. Sodium Sulfate, USP The chemical name is Na 2 SO 4 . The average Molecular Weight is 142.04. The structural formula is: Potassium Sulfate, FCC, purified The chemical name is K 2 SO 4 . The average Molecular Weight is 174.26. The structural formula is: Magnesium Sulfate, USP The chemical name is MgSO 4 . The average Molecular Weight: 120.37. The structural formula is: Each SUPREP Bowel Prep Kit also contains a polypropylene mixing container. Sodium Sulfate Potassium Sulfate Magnesium Sulfate

2 DOSAGE AND ADMINISTRATION Preparation and Administration ( 2.2 ) Must dilute in water prior to ingestion. Administration of two bottles of SUPREP Bowel Prep Kit is required for a complete preparation for colonoscopy. One bottle is equivalent to one dose. Must consume additional water after each dose. Stop consumption of all fluids at least 2 hours before the colonoscopy. Recommended Dosage and Administration Split-Dose (two-day) regimen consists of two doses of SUPREP Bowel Prep Kit: first dose during the evening prior to colonoscopy and second dose the next day, during the morning of colonoscopy. ( 2.1 , 2.3 , 2.4 ) Recommended SUPREP Bowel Prep Kit dosage is: º Adults: Two 6-ounce doses. ( 2.3 ) º Pediatric Patients 12 Years of Age and Older: Two 4.5-ounce doses. ( 2.4 ) For complete information on preparation before colonoscopy and administration of the dosage regimen, see full prescribing Information. ( 2.1 , 2.2 , 2.3 , 2.4 ) 2.1 Dosage and Adminstration Overview Administration of two bottles of SUPREP Bowel Prep Kit and additional water is required for a complete preparation for colonoscopy. One bottle of SUPREP Bowel Prep Kit is equivalent to one dose. SUPREP Bowel Prep Kit is supplied in two dosage strengths [see Dosage Forms and Strengths ( 3 )] . The recommended dosage is: • Adults: Two 6-ounce doses [see Dosage and Administration ( 2.3 )] . • Pediatric patients 12 years of age and older: Two 4.5-ounce doses [see Dosage and Administration ( 2.4 )] . 2.2 Important Preparation and Administration Instructions Correct fluid and electrolyte abnormalities before treatment with SUPREP Bowel Prep Kit [see Warnings and Precautions ( 5.1 )] Must dilute SUPREP Bowel Prep Kit in water before ingestion. Must consume additional water after each dose of SUPREP Bowel Prep Kit. On the day before colonoscopy, consume only a light breakfast or clear liquids (e.g., water, strained fruit juice without pulp, lemonade, plain coffee or tea, chicken broth, gelatin dessert without fruit). On the day of the colonoscopy only consume clear liquids up to two hours prior to colonoscopy. Do not eat solid food or drink milk or eat or drink anything colored red or purple. Do not drink alcohol. Do not take other laxatives while taking SUPREP Bowel Prep Kit. Do not take oral medications within one hour of starting each dose of SUPREP Bowel Prep Kit. If taking tetracycline or fluoroquinolone antibiotics, iron, digoxin, chlorpromazine, or penicillamine, take these medications at least 2 hours before and not less than 6 hours after administration of SUPREP Bowel Kit [see Drug Interactions ( 7.2 )] . Stop consumption of all fluids at least 2 hours prior to the colonoscopy. 2.3 Recommended Dosage and Administration for Adults The recommended Split-Dose (two-day) regimen for adults consists of two 6-ounce doses of SUPREP Bowel Prep Kit: the first dose during the evening prior to colonoscopy and the second dose the next day, during the morning of the colonoscopy. Each dose consists of one bottle of SUPREP Bowel Prep Kit with additional water. The total volume of liquid required for colon cleansing (using two bottles) is 3 quarts. The following are recommended dosage and administration instructions for adults: Dose 1 – On the Day Prior to Colonoscopy: May consume a light breakfast, or only clear liquids (no solid food). In the evening before the procedure, pour the contents of one bottle of SUPREP Bowel Prep Kit into the mixing container provided. Add cool drinking water to the 16-ounce fill line on the container, mix, and drink the entire amount. Drink two additional containers filled with water to the 16-ounce fill line over the next hour. Dose 2 - Day of Colonoscopy: Continue to consume only clear liquids. In the morning (10 to 12 hours after the evening dose) on the day of the procedure, pour the contents of the second bottle of SUPREP Bowel Prep Kit into the mixing container provided. Add cool drinking water to the 16-ounce fill line on the container, mix, and drink the entire amount. Drink two additional containers filled with water to the 16-ounce fill line over the next hour. Complete all solution of SUPREP Bowel Prep Kit and required water at least two hours prior to colonoscopy. 2.4 Recommended Dosage and Administration for Pediatric Patients 12 Years of Age and Older The recommended Split-Dose (two-day) regimen for pediatric patients 12 years of age and older consists of two 4.5-ounce doses of SUPREP Bowel Prep Kit: the first dose during the evening prior to colonoscopy and the second dose the next day, during the morning of the colonoscopy. Each dose consists of one bottle of SUPREP Bowel Prep Kit with additional water. The total volume of liquid required for colon cleansing (using two bottles) is 2.25 quarts. The following are recommended dosage and administration instructions for pediatric patients 12 years of age and older and/or their caregivers: Dose 1 – On the Day Prior to Colonoscopy: • May consume a light breakfast, or only clear liquids (no solid food). • In the evening before the procedure, pour the contents of one bottle of SUPREP Bowel Prep Kit into the mixing container provided. • Add cool drinking water to the 12-ounce fill line on the container, mix, and drink the entire amount. • Drink two additional containers filled with water to the 12-ounce fill line over the next hour. Dose 2 – Day of Colonoscopy: • Continue to consume only clear liquids. • In the morning (10 to 12 hours after the evening dose) on the day of the procedure, pour the contents of the second bottle of SUPREP Bowel Prep Kit into the mixing container provided. • Add cool drinking water to the 12-ounce fill line on the container, mix, and drink the entire amount. • Drink two additional containers filled with water to the 12-ounce fill line over the next hour. • Complete all solution of SUPREP Bowel Prep Kit solution and required water at least two hours prior to colonoscopy.

1 INDICATIONS AND USAGE SUPREP Bowel Prep Kit is indicated for cleansing of the colon as a preparation for colonoscopy in adult and pediatric patients 12 years of age and older. SUPREP Bowel Prep Kit is an osmotic laxative indicated for cleansing of the colon in preparation for colonoscopy in adult and pediatric patients 12 years of age and older. ( 1 )

10 OVERDOSAGE Overdosage of more than the recommended dose of SUPREP Bowel Prep Kit may lead to severe electrolyte disturbances, as well as dehydration and hypovolemia, with signs and symptoms of these disturbances. [see Warnings and Precautions ( 5.1 , 5.2 , 5.3 ) ] . Monitor for fluid and electrolyte disturbances and treat symptomatically.

7 DRUG INTERACTIONS Drugs that increase risk of fluid and electrolyte imbalance. ( 7.1 ) 7.1 Drugs That May Increase Risks of Fluid and Electrolyte Abnormalities Use caution when prescribing SUPREP Bowel Prep Kit to patients taking medications that increase the risk of fluid and electrolyte disturbances or may increase the risk of adverse events of seizure, arrhythmias, and prolonged QT in the setting of fluid and electrolyte abnormalities [see Warnings and Precautions ( 5.1 , 5.2 , 5.3 , 5.4 )]. 7.2 Potential for Reduced Drug Absorption SUPREP Bowel Prep Kit can reduce the absorption of other co-administered drugs [see Dosage and Administration ( 2.1 )] . Administer oral medications at least one hour before starting each dose of SUPREP Bowel Prep Kit. Administer tetracycline and fluoroquinolone antibiotics, iron, digoxin, chlorpromazine, and penicillamine at least 2 hours before and not less than 6 hours after administration of SUPREP Bowel Prep Kit to avoid chelation with magnesium. 7.3 Stimulant Laxatives Concurrent use of stimulant laxatives and SUPREP Bowel Prep Kit may increase the risk of mucosal ulceration or ischemic colitis. Avoid use of stimulant laxatives (e.g., bisacodyl, sodium picosulfate) while taking SUPRPEP Bowel Prep Kit [see Warnings and Precautions ( 5.5 )] .

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Sulfate salts provide sulfate anions, which are poorly absorbed. The osmotic effect of unabsorbed sulfate anions and the associated cations causes water to be retained within the gastrointestinal tract. 12.2 Pharmacodynamics No formal pharmacodynamic studies have been conducted with SUPREP Bowel Prep Kit. 12.3 Pharmacokinetics Absorption and Elimination After administration of SUPREP Bowel Prep Kit in six healthy subjects, the time at which serum sulfate reached its highest point (Tmax) was approximately 17 hours after the first dose or approximately 5 hours after the second dose, and then declined with a half-life of 8.5 hours. Excretion Fecal excretion was the primary route of sulfate elimination. Specific Populations Patients with Renal Impairment The disposition of sulfate after ingestion of SUPREP Bowel Prep Kit was studied in patients (N=6) with moderate renal impairment (creatinine clearance of 30 to 49 mL/min). In patients with moderate renal impairment, mean AUC was 54% higher and mean Cmax was 44% higher, than healthy subjects. The mean sulfate concentrations in healthy subjects and in patients with moderate renal impairment returned to their respective baselines by Day 6 after dose initiation. Urinary excretion of sulfate over 30 hours after the first dose was approximately 16% lower in patients with moderate renal impairment than in healthy subjects. These differences are not considered clinically meaningful. Patients with Hepatic Impairment The disposition of sulfate after ingestion of SUPREP Bowel Prep Kit was studied in patients (N=6) with mild to moderate hepatic impairment (Child-Pugh grades A and B). Systemic exposure of serum sulfate (AUC and Cmax) was similar between healthy subjects and patients with hepatic impairment. The mean sulfate concentrations in healthy subjects and in patients with mild to moderate hepatic impairment returned to their respective baselines by Day 6 after dose initiation. Urinary excretion of sulfate over 30 hours after the first dose was similar between patients with hepatic impairment and healthy subjects.

12.1 Mechanism of Action Sulfate salts provide sulfate anions, which are poorly absorbed. The osmotic effect of unabsorbed sulfate anions and the associated cations causes water to be retained within the gastrointestinal tract.

12.2 Pharmacodynamics No formal pharmacodynamic studies have been conducted with SUPREP Bowel Prep Kit.

12.3 Pharmacokinetics Absorption and Elimination After administration of SUPREP Bowel Prep Kit in six healthy subjects, the time at which serum sulfate reached its highest point (Tmax) was approximately 17 hours after the first dose or approximately 5 hours after the second dose, and then declined with a half-life of 8.5 hours. Excretion Fecal excretion was the primary route of sulfate elimination. Specific Populations Patients with Renal Impairment The disposition of sulfate after ingestion of SUPREP Bowel Prep Kit was studied in patients (N=6) with moderate renal impairment (creatinine clearance of 30 to 49 mL/min). In patients with moderate renal impairment, mean AUC was 54% higher and mean Cmax was 44% higher, than healthy subjects. The mean sulfate concentrations in healthy subjects and in patients with moderate renal impairment returned to their respective baselines by Day 6 after dose initiation. Urinary excretion of sulfate over 30 hours after the first dose was approximately 16% lower in patients with moderate renal impairment than in healthy subjects. These differences are not considered clinically meaningful. Patients with Hepatic Impairment The disposition of sulfate after ingestion of SUPREP Bowel Prep Kit was studied in patients (N=6) with mild to moderate hepatic impairment (Child-Pugh grades A and B). Systemic exposure of serum sulfate (AUC and Cmax) was similar between healthy subjects and patients with hepatic impairment. The mean sulfate concentrations in healthy subjects and in patients with mild to moderate hepatic impairment returned to their respective baselines by Day 6 after dose initiation. Urinary excretion of sulfate over 30 hours after the first dose was similar between patients with hepatic impairment and healthy subjects.

20200818

8

3 DOSAGE FORMS AND STRENGTHS SUPREP Bowel Prep Kit (for adults) : Two bottles each containing 6 ounces of an oral solution of 17.5 grams sodium sulfate, 3.13 grams potassium sulfate, and 1.6 grams magnesium sulfate as a clear to slightly hazy liquid. SUPREP Bowel Prep Kit (for pediatric patients 12 years of age and older) : Two bottles each containing 4.5 ounces of an oral solution of 13.13 grams sodium sulfate, 2.35 grams potassium sulfate, and 1.2 grams magnesium sulfate as a clear to slightly hazy liquid. When diluted as directed, the solution is clear and colorless. SUPREP Bowel Prep Kit (for adults) : Two bottles each containing 6 ounces of an oral solution of 17.5 grams sodium sulfate, 3.13 grams potassium sulfate, and 1.6 grams magnesium sulfate. ( 3 ) SUPREP Bowel Prep Kit (for pediatric patients 12 years of age and older) : Two bottles each containing 4.5-ounces of an oral solution of 13.13 grams sodium sulfate, 2.35 grams potassium sulfate, and 1.2 grams magnesium sulfate. ( 3 )

SUPREP Bowel Prep sodium sulfate, potassium sulfate, magnesium sulfate SODIUM BENZOATE SUCRALOSE MALIC ACID CITRIC ACID MONOHYDRATE SODIUM SULFATE SODIUM CATION POTASSIUM SULFATE POTASSIUM CATION MAGNESIUM SULFATE, UNSPECIFIED FORM MAGNESIUM CATION BERRY SUPREP Bowel Prep sodium sulfate, potassium sulfate, magnesium sulfate SODIUM BENZOATE SUCRALOSE MALIC ACID CITRIC ACID MONOHYDRATE SODIUM SULFATE SODIUM CATION POTASSIUM SULFATE POTASSIUM CATION MAGNESIUM SULFATE, UNSPECIFIED FORM MAGNESIUM CATION BERRY

13.2 Animal Toxicology and/or Pharmacology The sulfate salts of sodium, potassium, and magnesium contained in SUPREP Bowel Prep Kit were administered orally (gavage) to rats and dogs up to 28 days up to a maximum daily dose of 5 grams/kg/day (approximately 0.9 and 3 times for rats and dogs, respectively, the recommended human dose of 44 grams/day or 0.89 grams/kg based on the body surface area). In rats, the sulfate salts caused diarrhea and electrolyte and metabolic changes, including hypochloremia, hypokalemia, hyponatremia, lower serum osmolality, and high serum bicarbonate. Significant renal changes included increased fractional sodium excretion, increased urinary sodium and potassium excretion, and alkaline urine in both males and females. In addition, creatinine clearance was significantly decreased in females at the highest dose. No microscopic renal changes were seen. In dogs, the sulfate salts caused emesis, excessive salivation, excessive drinking of water, and abnormal excreta (soft and/or mucoid feces and/or diarrhea) and increased urine pH and sodium excretion.

13 NONCLINICAL TOXICOLOGY 13.2 Animal Toxicology and/or Pharmacology The sulfate salts of sodium, potassium, and magnesium contained in SUPREP Bowel Prep Kit were administered orally (gavage) to rats and dogs up to 28 days up to a maximum daily dose of 5 grams/kg/day (approximately 0.9 and 3 times for rats and dogs, respectively, the recommended human dose of 44 grams/day or 0.89 grams/kg based on the body surface area). In rats, the sulfate salts caused diarrhea and electrolyte and metabolic changes, including hypochloremia, hypokalemia, hyponatremia, lower serum osmolality, and high serum bicarbonate. Significant renal changes included increased fractional sodium excretion, increased urinary sodium and potassium excretion, and alkaline urine in both males and females. In addition, creatinine clearance was significantly decreased in females at the highest dose. No microscopic renal changes were seen. In dogs, the sulfate salts caused emesis, excessive salivation, excessive drinking of water, and abnormal excreta (soft and/or mucoid feces and/or diarrhea) and increased urine pH and sodium excretion.

NDA022372

SUPREP Bowel Prep

sodium sulfate, potassium sulfate, magnesium sulfate

52268-012

HUMAN PRESCRIPTION DRUG

ORAL

Principal Display Panel – Adult Carton Label NDC 52268-012-01 U.S. Patent 6,946,149 Dispense the enclosed Medication Guide to each patient. SUPREP BOWEL PREP KIT (sodium sulfate, potassium sulfate and magnesium sulfate) Oral Solution For Adults (17.5g/3.13g/1.6g) per 6 ounces This carton contains: 2 6-ounce (177 mL) bottles of liquid bowel prep 1 16-ounce mixing container 1 Patient booklet. Booklet includes: 1- Medication Guide 2- Patient Instructions 3- Full Prescribing Information R ecommended Dosage: See prescribing information Dilute the solution concentrate as directed prior to use. Both 6-ounce bottles are required for a complete prep. Rx only Braintree A PART OF SEBELA PHARMACEUTICALS Adult Carton

I ndications and Usage ( 1 ) 8/2020 Dosage and Administration ( 2.1 , 2.4 ) 8/2020

17 PATIENT COUNSELING INFORMATION Advise the patient and/or caregiver to read the FDA-approved patient labeling (Medication Guide). Instruct patients or caregivers: Must dilute SUPREP Bowel Prep Kit before ingestion. Must consume additional water after each dose of SUPREP Bowel Prep Kit. On the day before colonoscopy, consume only a light breakfast or clear liquids (e.g., water, apple or orange juice without pulp, lemonade, coffee, tea, or chicken broth). On the day of the colonoscopy only consume clear liquids up to two hours prior to colonoscopy. Two doses of SUPREP Bowel Prep Kit are required for a complete preparation for colonoscopy. One bottle of SUPREP Bowel Prep Kit is equivalent to one dose. Do not to take other laxatives while taking SUPREP Bowel Prep Kit. Do not eat solid food or drink milk or eat or drink anything colored red or purple. Do not drink alcohol. Do not take oral medications within one hour of starting each dose of SUPREP Bowel Prep Kit. If taking tetracycline or fluoroquinolone antibiotics, iron, digoxin, chlorpromazine, or penicillamine, take these medications at least 2 hours before and not less than 6 hours after administration of SUPREP Bowel Prep Kit [see Drug Interactions ( 7.2 )] . Stop consumption of all fluids at least 2 hours prior to colonoscopy. Contact their healthcare provider if they develop significant vomiting or signs of dehydration after taking SUPREP Bowel Prep Kit or if they experience cardiac arrhythmias or seizures [see Warnings and Precautions ( 5.1 , 5.2 , 5.3 )] . Distributed by Braintree Laboratories, Inc. Braintree, MA 02185 U.S. Patent 6,946,149

MEDICATION GUIDE SUPREP ® (Soo-prep) Bowel Prep Kit (sodium sulfate, potassium sulfate and magnesium sulfate) oral solution Read and understand this Medication Guide instructions at least 2 days before your colonoscopy and again before you start taking SUPREP Bowel Prep Kit. What is the most important information I should know about SUPREP Bowel Prep Kit? SUPREP Bowel Prep Kit and other bowel preparations can cause serious side effects, including: Serious loss of body fluid (dehydration) and changes in blood salts (electrolytes) in your blood. These changes can cause: abnormal heartbeats that can cause death seizures. This can happen even if you have never had a seizure. kidney problems Your chance of having fluid loss and changes in body salts with SUPREP Bowel Prep Kit is higher if you: • have heart problems • have kidney problems • take water pills or non-steroidal anti-inflammatory drugs (NSAIDS) Tell your healthcare provider right away if you have any of these symptoms of a loss of too much body fluid (dehydration) while taking SUPREP Bowel Prep Kit: o vomiting o urinating less often than normal o dizziness o headache See What are the possible side effects of SUPREP Bowel Prep Kit? for more information about side effects. What is SUPREP Bowel Prep Kit? SUPREP Bowel Prep Kit is a prescription medicine used by adults and children 12 years of age and older to clean the colon before a colonoscopy. SUPREP Bowel Prep Kit cleans your colon by causing you to have diarrhea. Cleaning your colon helps your healthcare provider see the inside of your colon more clearly during your colonoscopy. It is not known if SUPREP Bowel Prep Kit is safe and effective in children under 12 years of age. Do not take SUPREP Bowel Prep Kit if your healthcare provider has told you that you have: • a blockage in your intestine (bowel obstruction) • an opening in the wall of your stomach or intestine (bowel perforation) • a very dilated intestine (toxic megacolon) • problems with the emptying of food and fluid from your stomach (gastric retention) • an allergy to any of the ingredients in SUPREP Bowel Prep Kit. See the end of this Medication Guide for a complete list of ingredients in SUPREP Bowel Prep Kit. Before taking SUPREP Bowel Prep Kit, tell your healthcare provider about all of your medical conditions, including if you: • have problems with serious loss of body fluid (dehydration) and changes in blood salts (electrolytes). • have gout • have heart problems including an irregular heartbeat, especially a condition called "QT prolongation". • have a history of seizures or take medicines for seizures. • are withdrawing from drinking alcohol or from taking benzodiazepines. • have a low blood salt (sodium) level. • have kidney problems or take medicines for kidney problems. • have stomach or bowel problems including ulcerative colitis. • have problems with swallowing or gastric reflux. • are pregnant or plan to become pregnant. It is not known if SUPREP Bowel Prep Kit will harm your unborn baby. Talk to your healthcare provider if you are pregnant. • are breastfeeding or plan to breastfeed. It is not known if SUPREP Bowel Prep Kit passes into your breast milk. You and your healthcare provider should decide if you will take SUPREP Bowel Prep Kit while breastfeeding. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. SUPREP Bowel Prep Kit may affect how other medicines work. Medicines taken by mouth may not be absorbed properly when taken within 1 hour before the start of each dose of SUPREP Bowel Prep Kit. Especially tell your healthcare provider if you take: • medicines for blood pressure or heart problems. • medicines for kidney problems. • medicines for seizures. • water pills (diuretics). • non-steroidal anti-inflammatory medicines (pain medicines). • medicines for depression or mental health problems. • laxatives. Do not take other laxatives while taking SUPREP Bowel Prep Kit. The following medicines should be taken at least 2 hours before starting SUPREP Bowel Prep Kit and not less than 6 hours after taking SUPREP Bowel Prep Kit: • tetracycline • fluoroquinolone antibiotics • iron • digoxin (Lanoxin) • chloropromazine • penicillamine (Cuprimine. Depen) Ask your healthcare provider or pharmacist for a list of these medicines if you are not sure if you are taking any of the medicines listed above. Know the medicines you take. Keep a list of them to show your healthcare provider and pharmacist when you get a new medicine. How should I take SUPREP Bowel Prep Kit? See the Instructions for Use in the Patient Instructions for Use Booklet for dosing instructions. You must read, understand, and follow these instructions to take SUPREP Bowel Prep Kit the right way. • Take SUPREP Bowel Prep Kit exactly as your healthcare provider tells you to take it. • Each bottle of SUPREP Bowel Prep Kit must be mixed with water (diluted) before drinking. • It is important for you to drink the additional prescribed amount of water listed in the Instructions for Use to prevent fluid loss (dehydration). • One bottle of SUPREP Bowel Prep Kit is equal to one dose. • Two doses of SUPREP Bowel Prep Kit are required for complete colonoscopy preparation. • All people taking SUPREP Bowel Prep Kit should follow these general instructions starting 1 day before your colonoscopy: • eat only a light breakfast or clear liquids (for example: water, strained fruit juice without pulp, lemonade, plain coffee or tea, chicken broth, gelatin dessert without fruit) on the day before your procedure. • only drink clear liquids the rest of the day and the next day until 2 hours before your colonoscopy. Stop drinking all fluids at least 2 hours before your colonoscopy. • after taking SUPREP Bowel Prep Kit if you have any bloating or feeling like your stomach is upset, wait to take your second dose until your stomach feels better. • While taking SUPREP Bowel Prep Kit, do not: • take any other laxatives. • take any medicines by mouth (oral) within 1 hour of starting SUPREP Bowel Prep Kit. • eat solid foods, drink dairy (such as milk), or drink alcohol while taking SUPREP Bowel Prep Kit and until after your colonoscopy • eat or drink anything colored red or purple. Contact your healthcare provider right away if after taking SUPREP Bowel Prep Kit you have severe vomiting, signs of dehydration, changes in consciousness such as feeling confused, delirious or fainting (loss of consciousness) or seizures after taking SUPREP Bowel Prep Kit. What are the possible side effects of SUPREP Bowel Prep Kit? SUPREP Bowel Prep Kit can cause serious side effects, including: • See What is the most important information I should know about SUPREP Bowel Prep Kit? • Changes in certain blood tests. Your healthcare provider may do blood tests after you take SUPREP Bowel Prep Kit to check your blood for changes. Tell your healthcare provider if you have any symptoms of too much fluid loss, including: o vomiting o nausea o bloating o dizziness o stomach area (abdomen) cramping o headache o urinate less than usual o trouble drinking clear liquid o trouble swallowing o seizures o heart problems o worsening gout • Ulcers of the bowel or bowel problems (ischemic colitis). Tell your healthcare provider right away if you have severe stomach-area (abdomen) pain or rectal bleeding. The most common side effects of SUPREP Bowel Prep Kit in adults include: o overall discomfort o stomach bloating o stomach pain o nausea o vomiting The most common side effects of SUPREP Bowel Prep Kit in children 12 to 16 years of age include: o nausea o stomach pain o stomach bloating o vomiting These are not all the possible side effects of SUPREP Bowel Prep Kit. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. How should I store SUPREP Bowel Prep Kit? • Store SUPREP Bowel Prep Kit at room temperature, between 68°F to 77°F (20°C to 25°C). Keep SUPREP Bowel Prep Kit and all medicines out of the reach of children. General information about the safe and effective use of SUPREP Bowel Prep Kit. Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use SUPREP Bowel Prep Kit for a condition for which it was not prescribed. Do not give SUPREP Bowel Prep Kit to other people, even if they are going to have the same procedure you are. It may harm them. You can ask your pharmacist or healthcare provider for information about SUPREP Bowel Prep Kit that is written for healthcare professionals. What are the ingredients in SUPREP Bowel Prep Kit? SUPREP Bowel Prep Kit is supplied in two dosage strengths. SUPREP Bowel Prep Kit comes in a carton containing two 6-ounce bottles, along with a 16-ounce polypropylene mixing container. SUPREP Pediatric Bowel Prep Kit comes in a carton containing two bottles containing 4.5 ounces of oral solution, along with a 12-ounce polypropylene mixing container. Each bottle contains: Active ingredients: sodium sulfate, potassium sulfate and magnesium sulfate. Inactive ingredients: citric acid, USP, flavoring ingredients, malic acid, FCC, sodium benzoate, NF, sucralose, purified water, USP. Distributed by Braintree Laboratories, Inc. 60 Columbian Street West Braintree, MA 02185, USA For more information go to www.braintreelabs.com or call 1-800-874-6756. This Medication Guide has been approved by the U.S. Food and Drug Administration. Revised 08/2020

14 CLINICAL STUDIES Adults The colon cleansing efficacy of SUPREP Bowel Prep Kit was evaluated in a randomized, single-blind, active-controlled, multicenter study in adult patients scheduled to have a colonoscopy. There were 363 adult patients included in the efficacy analysis. Patients ranged in age from 20 to 84 years (mean age 55 years) and 54% were female. Race distribution was 86% Caucasian, 9% African-American, and 5% other. Patients were randomized to one of the following two colon preparation regimens: SUPREP Bowel Prep Kit or a marketed polyethylene glycol (PEG) plus electrolytes bowel preparation. In the Study SUPREP Bowel Prep Kit was administered as a split-dose (two-day) regimen. The PEG bowel prep was also given as a split-dose preparation according to its labeled instructions. Patients receiving SUPREP Bowel Prep Kit were limited to a light breakfast followed by clear liquids on the day prior to the day of colonoscopy; patients receiving the PEG bowel prep were allowed to have a normal breakfast and a light lunch, followed by clear liquids. The primary efficacy endpoint was the proportion of patients with successful colon cleansing as assessed by the colonoscopists, who were not informed about the type of preparation received, as shown in Table 3. In the study, no clinically or statistically significant differences were seen between the group treated with SUPREP Bowel Prep Kit and the group treated with the PEG bowel prep. Table 3: Proportion of Adult Patients with Successful Colon Cleansing Response Rates 1 Responders were patients whose colon preparations were graded excellent (no more than small bits of adherent feces/fluid) or good (small amounts of feces or fluid not interfering with the exam) by the colonoscopist. 2 Does not equal difference in tabled responder rates due to rounding effects. Treatment Group Regimen N Responders 1 % (95% C. I.) SUPREP – PEG Difference (95% CI) SUPREP Bowel Prep Kit (with light breakfast) Split-Dose 180 97% (94%, 99%) 2% 2 (-2%, 5%) PEG bowel prep (with normal breakfast & light lunch) Split-Dose 183 96% (92%, 98%) Pediatric Patients 12 Years to 16 Years of Age SUPREP Bowel Prep Kit was evaluated for colon cleansing in a randomized, single-blind, multicenter, doseranging, active-controlled study in 89 pediatric patients 12 years to 16 years of age. The majority of patients were female (57%), white (78%), and of non-Hispanic or non-Latino ethnicity (91%). The mean age was 14 years. The median body weight was 60 kg (range 32 to 155 kg). Patients were randomized to SUPREP Bowel Prep Kit (two 6-ounce doses), SUPREP Bowel Prep Kit (two 4.5-ounce doses) or oral PEG solution. SUPREP Bowel Prep Kit (two 6-ounce doses) did not demonstrate additional treatment benefit and more patients reported gastrointestinal adverse reactions compared to SUPREP Bowel Prep Kit (two 4.5-ounce doses); therefore, SUPREP Bowel Prep Kit (two 6-ounce doses) is not recommended for pediatric patients 12 years of age and older [see Dosage and Administration ( 2.4 )] . Patients in the SUPREP Bowel Prep Kit (two 4.5-ounce doses) group took the preparation in a “split-dose” regimen, where the first dose was taken the evening before colonoscopy, with the second dose taken the morning of the exam. Patients in the control group took the preparation according to its approved labeling on the evening before colonoscopy. Patients in the SUPREP Bowel Prep Kit group (two 4.5-ounce doses) were allowed to have a light breakfast on the day before colonoscopy, followed by clear liquids until the colonoscopy is completed the following day. Patients in the control group subjects were permitted only clear liquids on the day prior to colonoscopy until completion of the colonoscopy the following day. The primary efficacy endpoint was the proportion of patients with successful colon cleansing as assessed by the colonoscopists, who were not informed about the type of preparation received. The percentage of responders and the associated 95% confidence intervals for the SUPREP Bowel Prep Kit (two 4.5-ounce doses) and Oral PEG solution are shown in Table 4. Efficacy was similar between patients who weighed 65 kg or more (n=12) and those patients who weighed less than 65 kg (n=15) in the SUPREP Bowel Prep Kit (two 4.5-ounce doses) arm. Table 4: Proportion of Pediatric Patients 12 Years to 16 Years of Age with Successful Colon Cleansing Response Rates 1 Responders were patients whose colon preparations were graded excellent (no more than small bits of adherent feces/fluid) or good (small amounts of feces or fluid not interfering with the exam) by the colonoscopist. 2 Does not equal difference in tabled responder rates due to rounding effects. Treatment Group Regimen N Responders 1 % (95% C. I.) SUPREP – PEG Difference (95% CI) SUPREP Bowel Prep Kit 4.5 ounces per dose (with light breakfast) Split-Dose 26 85% (71%, 99%) 25% 2 (3%, 47%) Oral PEG Solution (with clear liquids only) Evening Dosing 32 59% (42%, 76%)

8.5 Geriatric Use Of the 375 patients who received SUPREP Bowel Prep Kit in clinical trials, 94 (25%) were 65 years of age or older, and 25 (7%) were 75 years of age or older. No overall differences in safety or effectiveness of SUPREP Bowel Prep Kit, administered as the recommended split-dose (2-day) regimen, were observed between geriatric patients and younger patients. Geriatric patients reported more vomiting when SUPREP Bowel Prep Kit was given as a one-day preparation (not a recommended regimen). Elderly patients are more likely to have decreased hepatic, renal or cardiac function and may be more susceptible to adverse reactions resulting from fluid and electrolyte abnormalities [see Warnings and Precautions ( 5.1 )] .

8.4 Pediatric Use The safety and effectiveness of SUPREP Bowel Prep Kit (two 4.5-ounce doses) have been established for cleansing of the colon as a preparation for colonoscopy in pediatric patients 12 years of age and older. Use of SUPPREP Bowel Prep Kit in this age group is supported by evidence from an adequate and well-controlled trial of SUPREP Bowel Prep Kit in adults and a single, dose-ranging, controlled trial in 89 pediatric patients 12 years to 16 years of age [see Clinical Studies ( 14 )] . In the pediatric trial, SUPREP Bowel Prep Kit (two 6-ounce doses) did not demonstrate additional treatment benefit and more patients reported gastrointestinal adverse reactions compared to SUPREP Bowel Prep Kit (two 4.5-ounce doses). Therefore, SUPREP Bowel Prep Kit (two 6-ounce doses) is not recommended for pediatric patients 12 years of age and older [see Dosage and Administration ( 2.3 )] . The safety profile of SUPREP Bowel Prep Kit (two 4.5-ounce doses) in this pediatric population was similar to that seen in adults [see Adverse Reactions ( 6.1 )] . The safety and effectiveness of SUPREP Bowel Prep Kit in pediatric patients less than 12 years of age have not been established.

8.1 Pregnancy Risk Summary There are no available data on SUPREP Bowel Prep Kit use in pregnant women to evaluate for a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes. Animal reproductive studies have not been conducted with sodium sulfate, potassium sulfate, and magnesium sulfate (SUPREP Bowel Prep Kit). The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major bi rth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.

8 USE IN SPECIFIC POPULATIONS 8.1 Pregnancy Risk Summary There are no available data on SUPREP Bowel Prep Kit use in pregnant women to evaluate for a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes. Animal reproductive studies have not been conducted with sodium sulfate, potassium sulfate, and magnesium sulfate (SUPREP Bowel Prep Kit). The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major bi rth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. 8.2 Lactation Risk Summary There are no data available data on the presence of SUPREP Bowel Prep Kit in human or animal milk, the effects on the breastfed child, or the effects on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for SUPREP Bowel Prep Kit and any potential adverse effects on the breastfed child from SUPREP Bowel Prep Kit or from the underlying maternal condition. 8.4 Pediatric Use The safety and effectiveness of SUPREP Bowel Prep Kit (two 4.5-ounce doses) have been established for cleansing of the colon as a preparation for colonoscopy in pediatric patients 12 years of age and older. Use of SUPPREP Bowel Prep Kit in this age group is supported by evidence from an adequate and well-controlled trial of SUPREP Bowel Prep Kit in adults and a single, dose-ranging, controlled trial in 89 pediatric patients 12 years to 16 years of age [see Clinical Studies ( 14 )] . In the pediatric trial, SUPREP Bowel Prep Kit (two 6-ounce doses) did not demonstrate additional treatment benefit and more patients reported gastrointestinal adverse reactions compared to SUPREP Bowel Prep Kit (two 4.5-ounce doses). Therefore, SUPREP Bowel Prep Kit (two 6-ounce doses) is not recommended for pediatric patients 12 years of age and older [see Dosage and Administration ( 2.3 )] . The safety profile of SUPREP Bowel Prep Kit (two 4.5-ounce doses) in this pediatric population was similar to that seen in adults [see Adverse Reactions ( 6.1 )] . The safety and effectiveness of SUPREP Bowel Prep Kit in pediatric patients less than 12 years of age have not been established. 8.5 Geriatric Use Of the 375 patients who received SUPREP Bowel Prep Kit in clinical trials, 94 (25%) were 65 years of age or older, and 25 (7%) were 75 years of age or older. No overall differences in safety or effectiveness of SUPREP Bowel Prep Kit, administered as the recommended split-dose (2-day) regimen, were observed between geriatric patients and younger patients. Geriatric patients reported more vomiting when SUPREP Bowel Prep Kit was given as a one-day preparation (not a recommended regimen). Elderly patients are more likely to have decreased hepatic, renal or cardiac function and may be more susceptible to adverse reactions resulting from fluid and electrolyte abnormalities [see Warnings and Precautions ( 5.1 )] . 8.6 Renal Impairment Use SUPREP Bowel Prep Kit with caution in patients with renal impairment or patients taking concomitant medications that may affect renal function. These patients may be at risk for renal injury. Advise these patients of the importance of adequate hydration before, during and after use of SUPREP Bowel Prep Kit and consider performing baseline and post-colonoscopy laboratory tests (electrolytes, creatinine, and BUN) in these patients [see Warnings and Precautions ( 5.4 )] .

16 HOW SUPPLIED/STORAGE AND HANDLING Each SUPREP Bowel Prep Kit (sodium sulfate, potassium sulfate, and magnesium sulfate) oral solution (for adults) (NDC 52268-012-01) contains: Two bottles (NDC 52268-011-01) each containing 6-ounces of an oral solution of 17.5 grams sodium sulfate, 3.13 grams potassium sulfate, and 1.6 grams magnesium sulfate as a clear to slightly hazy liquid. When diluted as directed, the solution is clear and colorless. One (1) mixing container with a 16-ounce fill line. Each SUPREP Bowel Prep Kit (sodium sulfate, potassium sulfate, and magnesium sulfate) oral solution (for pediatric patients 12 years of age and older) (NDC 52268-112-01) contains: Two bottles (NDC 52268-111-01) each containing 4.5-ounces of an oral solution of 13.13 grams sodium sulfate, 2.35 grams potassium sulfate, and 1.2 grams magnesium sulfate as a clear to slightly hazy liquid. When diluted as directed, the solution is clear and colorless. One (1) mixing container with a 12-ounce fill line. Store at 20° to 25°C (68° to 77°F). Excursions permitted between 15° to 30°C (59° to 86°F). See USP controlled room temperature.

Store at 20° to 25°C (68° to 77°F). Excursions permitted between 15° to 30°C (59° to 86°F). See USP controlled room temperature.