This investigation was performed to study the effect of cypro heptadine hydrochloride (cyp), which is used in human medicine, as an appetizer on fowls. The experiment was carried out on Dkki 4 chicks. It was noted that food intake and body weight were slightly increased. The growth promoting effect of the drug ap peared after 9 weeks from its administration. Cyp administration did not improve the food utilization efficiency but caused slight changes in the dressed carcase and chemical analysis of meat. It was concluded that Cyp is of no ben eficial effect to be added to poultry mashes.