Tschacher, WWTschacherHämmig, RobertRobertHämmigJacobshagen, NNJacobshagen2024-10-132024-10-132003https://boris-portal.unibe.ch/handle/20.500.12422/95233Clinical observations and recent findings suggested different acceptance of morphine and heroin by intravenous drug users in opiate maintenance programs. We postulated that this is caused by differences in the perceived effects of these drugs, especially how desired and adverse effects of both drugs interacted.enarticle10.48350/215151240407300018089950001110.1007/s00213-002-1271-3