Active ingredient: Clemastine

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Clemastine uses

An ethanolamine-derivative, first generation histamine H1 antagonist used in hay fever, rhinitis, allergic skin conditions, and pruritus. It causes drowsiness.

Indication: For the relief of symptoms associated with allergic rhinitis such as sneezing, rhinorrhea, pruritus and acrimation. Also for the management of mild, uncomplicated allergic skin manifestations of urticaria and angioedema. Used as self-medication for temporary relief of symptoms associated with the common cold.

clemastine is an antihistamine with anticholinergic (drying) and sedative side effects. Antihistamines competitively antagonize various physiological effects of histamine including increased capillary permeability and dilatation, the formation of edema, the "flare" and "itch" response, and gastrointestinal and respiratory smooth muscle constriction. Within the vascular tree, H1- receptor antagonists inhibit both the vasoconstrictor and vasodilator effects of histamine. Depending on the dose, H1- receptor antagonists can produce CNS stimulation or depression. Most antihistamines exhibit central and/or peripheral anticholinergic activity. Antihistamines act by competitively blocking H1- receptor sites. Antihistamines do not pharmacologically antagonize or chemically inactivate histamine, nor do they prevent the release of histamine.


Clemastine available forms, composition, doses:

CVS Pharmacy dayhist allergy tablet0.28 USD
Clemastine Fumarate 0.67 mg/5ml Syrup 120ml Bottle22.2 USD
Clemastine Fumarate 1.34 mg tablet0.34 USD
Clemastine Fumarate 2.68 mg tablet0.9 USD
Clemastine fum 1.34 mg tablet0.58 USD
Clemastine fum 2.68 mg tablet0.86 USD
Clemastine fumarate powder255.0 USD
Dayhist tablet0.31 USD
Dayhist-1 1.34 mg tablet0.25 USD
Injectable; Injection; Clemastine Fumarate 1 mg / ml
Syrup; Oral; Clemastine Fumarate 0.5 mg / 5 ml
Tablets; Oral; Clemastine 1 mg
Tablets; Oral; Clemastine Fumarate 1.34 mg
Tablets; Oral; Clemastine Fumarate 2.68 mg
Tavist max-str sinus caplet0.17 USD
Tavist nd 10 mg tablet0.74 USD
Tavist-1 1.34 mg tablet0.5 USD


Indications and Usages:

ATC codes:

ICD-10 codes:

Clemastine destination | category:


Drugs with same active ingredients (Pharmaceutical companies):


  1. "clemastine". (accessed August 28, 2018).
  2. "clemastine". (accessed August 28, 2018).
  3. "95QN29S1ID: The UNique Ingredient Identifier (UNII) is an alphanumeric substance identifier from the joint FDA/USP Substance Registration System (SRS).". (accessed August 28, 2018).

Frequently asked Questions

Can i drive or operate heavy machine after consuming Clemastine?

Depending on the reaction of the Clemastine after taken, if you are feeling dizziness, drowsiness or any weakness as a reaction on your body, Then consider Clemastine not safe to drive or operate heavy machine after consumption. Meaning that, do not drive or operate heavy duty machines after taking the capsule if the capsule has a strange reaction on your body like dizziness, drowsiness. As prescribed by a pharmacist, it is dangerous to take alcohol while taking medicines as it exposed patients to drowsiness and health risk. Please take note of such effect most especially when taking Primosa capsule. It's advisable to consult your doctor on time for a proper recommendation and medical consultations.

Is Clemastine addictive or habit forming?

Medicines are not designed with the mind of creating an addiction or abuse on the health of the users. Addictive Medicine is categorically called Controlled substances by the government. For instance, Schedule H or X in India and schedule II-V in the US are controlled substances.

Please consult the medicine instruction manual on how to use and ensure it is not a controlled substance.In conclusion, self medication is a killer to your health. Consult your doctor for a proper prescription, recommendation, and guidiance.


Review conducted a study on Clemastine, and the result of the survey is set out below. It is noteworthy that the product of the survey is based on the perception and impressions of the visitors of the website as well as the views of Clemastine consumers. We, as a result of this, advice that you do not base your therapeutic or medical decisions on this result, but rather consult your certified medical experts for their recommendations.

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The information was verified by Dr. Arunabha Ray, MD Pharmacology

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