Clemastine - Drug Information

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General Information on Clemastine

Generic Name : Clemastine

Pronunciation : klem' as teen

Latest prescription information about Clemastine. Learn how to pronounce the drug's name, its indications, dosage, how to take, when to take, when not to take, side effects, special precautions, its storage instructions and warnings if any when taken during pregnancy. Also listed are the International and Indian trade name(s) of the drug and its price list.
ICD Code : Y43.0 | Therapeutic Classification : Antihistamines

Trade Names/Brand Names of Clemastine

India : 

International : 

Allerhist-1 and Tavist-1

Why is Clemastine Prescribed? (Indications)

This medication is an antihistamine and anticholinergic agent, prescribed for allergic rhinitis. It is also used for uricaria and angioedema. This medication inhibits the effect of histamines in the body.  

When should Clemastine not to be taken? (Contraindications)

Contraindicated in patients with increased eye pressure, breastfeeding women, newborns and hypersensitivity.

Pregnancy Category

A B C D X

Category B :

Animal studies have failed to demonstrate a risk to the fetus and appropriate studies on pregnant women are lacking.

What is the dosage of Clemastine?

Adult: PO- Allergic conditions- 1 mg twice daily, up to 6 g/day.
IV- Prophylaxis of acute allergic conditions- 2 mg/day.
IV/IM- Acute allergic reactions- 4 mg/day.

How should Clemastine be taken?

It comes as a tablet to take by mouth, with or without food.

What are the warnings and precautions for Clemastine?

Caution should be exercised in patients with history of asthma or other respiratory problems, increased eye pressure, ulcer, difficulty in urinating, blockage of the stomach, intestine, or urinary tract, heart disease, high blood pressure, seizures, overactive thyroid, any allergy, who are taking other medications, elderly, children, during pregnancy and breastfeeding.
It may cause drowsiness or dizziness, do not drive a car or operate machinery while taking this medication.
Avoid alcohol consumption.

What are the side effects of Clemastine?

   Central Nervous System : Drowsiness, CNS depression, dizziness and sedation.
   Gastrointestinal : Diarrhea, constipation, nausea and vomiting.
   Heart : Low blood pressure, headache, palpitations and fast heart rate.
   Genitourinary : Urinary frequency, difficult urination, urinary retention and early menses.
   Miscellaneous : Blurred vision, thickened respiratory secretions and ringing in the ear.

What are the other precautions for Clemastine?

Avoid maximum sun exposure.
Avoid excess dosage.

What are the storage conditions of Clemastine?

Store it at room temperature, away from direct sunlight. Keep away from children.

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