Tapentadol PR vs Oxycodon CR A pilotstudiy for a mechanism-orientated Therapy of peripheral chronic neuropathic pain syndrom

It shall be answered if Tapentadol PR compared to Oxycodon CR leads to a normalization of abnormal QST-Parameters (MPT, MPS, DMA and/or WUR with a Z-Value > 1,5 and/or a pathological side difference for these Parameters)