About cyproheptadine hydrochloride
First-generation antihistamine; serotonin antagonist
Used for
- Relief of allergy symptoms, including itching and hives
- Sometimes used to stimulate appetite
- Prevention of migraine in some cases
Usual adult dose
Allergies: usually 4 mg three times daily; maximum 32 mg daily. Other uses require clinician-directed dosing.
Usual dose in children
For allergies, ages 2–6: usually 2 mg two or three times daily; ages 7–14: usually 4 mg two or three times daily. Not for children under 2.
Common side effects
- Sleepiness and dizziness
- Dry mouth, blurred vision, or constipation
- Increased appetite and weight gain
- Confusion or difficulty urinating, especially in older adults
Important warnings
- Can impair alertness; avoid driving if drowsy.
- Avoid alcohol and use caution with sedatives.
- Not for newborns or premature infants; may worsen glaucoma or urinary retention.
- Seek urgent care for breathing difficulty, severe confusion, or an irregular heartbeat.
Pregnancy
Safety information is limited. Use during pregnancy only when a healthcare professional considers it necessary.
Breastfeeding
May reduce milk production and can cause infant drowsiness; use only with professional guidance.
Interactions
- Alcohol, sleeping medicines, opioids, and other sedatives increase drowsiness.
- Monoamine oxidase inhibitors can intensify or prolong effects.
- Other medicines with anticholinergic effects can increase dry mouth, constipation, and urinary problems.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.