Periactin Side Effects
Generic Name: cyproheptadine
Medically reviewed by Drugs.com. Last updated on Jan 22, 2021.
Note: This document contains side effect information about cyproheptadine. Some of the dosage forms listed on this page may not apply to the brand name Periactin.
For the Consumer
Applies to cyproheptadine: oral solution, oral tablets
Side effects include:
Sedation, sleepiness (often transient), dizziness, disturbed coordination, restlessness, excitation.
For Healthcare Professionals
Applies to cyproheptadine: compounding powder, oral syrup, oral tablet
The most commonly reported side effects included drowsiness and somnolence.[Ref]
Common (1% to 10%): Drowsiness, somnolence
Frequency not reported: Convulsions, coordination disturbance, dizziness, faintness, headache, neuritis, paresthesias, sedation/transient sedation, sleepiness/transient sleepiness, tremor, vertigo[Ref]
Some patients who developed drowsiness initially had an apparent improvement in symptoms when they continued taking this drug continuously over the next 3 to 4 days.[Ref]
Frequency not reported: Chest tightness, dry nose, dry throat, nasal stuffiness, thickened bronchial secretions, wheezing[Ref]
Frequency not reported: Anorexia, increased appetite, weight gain[Ref]
Frequency not reported: Chills, fatigue, rigors[Ref]
Frequency not reported: Blurred vision, diplopia[Ref]
Frequency not reported: Acute labyrinthitis[Ref]
1. "Product Information. Periactin (cyproheptadine)." Merck & Co, Inc, West Point, PA.
2. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
More about Periactin (cyproheptadine)
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Images
- Drug Interactions
- 59 Reviews
- Drug class: antihistamines
- FDA Alerts (1)
Related treatment guides
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.