Morphine responsiveness, efficacy and tolerability in patients with chronic non-tumor associated pain – results of a double-blind placebo-controlled trial (MONTAS)

Abstract
Efficacy, long-term effectiveness and safety of opioids in chronic non-tumor associated pain syndromes (NTAS) are still under debate. The study (MONTAS) was performed by physicians and psychologists as a multicenter prospective, randomized, double-blind placebo-controlled crossover trial, fo