 [ Symptoms ] i need help with cyproheptadine use i take cyproheptadine for increasing my appetite but makes me extremely tired and has stooped making me hungry i am a 14 year old male  [ Disease ] cyroheptadine hydrochloride is usually used for allergies and can cause drowsiness and may diminish mental alertness usually taken 4 mg three times a day but can be increased to 12 to 16 mg daily even up to 32 mg daily however you being only 14 i would not recommend increasing your dosage without seeing the dr who prescribed it i really do not see it increasing your appetite