|Systematic (IUPAC) name|
|Biological half-life||1.5 hours|
|CAS Registry Number|
|Molecular mass||348.438 g/mol|
|(what is this?)|
Acrivastine is a medication used for the treatment of allergies and hay fever. It is a second-generation H1-receptor antagonist antihistamine (like its base molecule triprolidine) and works by blocking Histamine H1 receptors.
This non-sedating[verification needed] antihistamine is sold under the brand name Benadryl Allergy Relief in the United Kingdom by McNeil Laboratories, not to be confused with Benadryl Once a Day, which is cetirizine and is also sold by McNeil in the UK. It is available as an over-the-counter medication in the UK, also offered with pseudoephedrine under the Benadryl brand
In the U.S., acrivastine is the active ingredient in the Semprex brand. Semprex-D is also acrivastine-based, but contains a decongestant, pseudoephedrine. Semprex-D is marketed in the U.S. by Actient Pharmaceuticals.
Comparisons with other popular antihistamines
Unlike cetirizine or loratadine, the standard dosage of which is one tablet every day, a single acrivastine tablet may be taken up to three times a day. Not to be taken by over 65's, pregnant women or people with compromised liver or kidney function.
- SEMPREX-D - acrivastine and pseudoephedrine hydrochloride capsule U.S. National Library of Medicine, National Institutes of Health, May 2008
- "Benadryl Allergy Relief". electronic Medicines Compendium (eMC). 2014. Retrieved 4 July 2014.
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