L Allegra et al.
Arzneimittel-Forschung, 38(8), 1163-1166 (1988-08-01)
The results of 6 clinical trials involving a total of 174 patients are reported. Levodropropizine (S(-)-3-(4-phenyl-piperazin-1-yl)-propane-1,2-diol, DF 526) was compared in double-blind manner with placebo, morclofone and cloperastine. The antitussive activity and therapeutic efficacy of the drug were shown to