
If you are over 60 years of age, you may be more likely to experience side effects from cyproheptadine. You may require a lower dose of this medication.

An underweight individual may use periactin to stimulate his appetite in order to gain weight. This usage of the drug in this way has not been approved by the Food and Drug Administration.

Symptoms of a cyproheptadine overdose include extreme sleepiness, confusion, weakness, ringing in the ears, blurred vision, large pupils, dry mouth, flushing, fever, shaking, insomnia, hallucinations, and possibly seizures.

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