3 doctors weighed in:
How long to develope tolerance to cyproheptadine periactin (cyproheptadine hydrochloride)?
3 doctors weighed in

Dr. Steven Machtinger
Internal Medicine - Allergy & Immunology
2 doctors agree
In brief: Highly variable
It may be a few weeks or months but I have one patient with chronic hives who has been on the same dose for over four years.

In brief: Highly variable
It may be a few weeks or months but I have one patient with chronic hives who has been on the same dose for over four years.
Dr. Steven Machtinger
Dr. Steven Machtinger
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