Select the analgesic which acts through opioid as well
as additional spinal monoaminergic mechanisms:
A. Tramadol
B. Ethoheptazine
C. Dextropropoxyphene
D. Alfentanil
as additional spinal monoaminergic mechanisms:
A. Tramadol
B. Ethoheptazine
C. Dextropropoxyphene
D. Alfentanil