Acrivastine
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| AHFS/Drugs.com | International Drug Names |
| MedlinePlus | a682619 |
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| Routes of administration |
oral |
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| Pharmacokinetic data | |
| Biological half-life | 1.5 hours |
| Excretion | Renal |
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| ChEMBL | |
| ECHA InfoCard | 100.110.306 |
| Chemical and physical data | |
| Formula | C22H24N2O2 |
| Molar mass | 348.438 g/mol |
| 3D model (Jmol) | |
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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 antihistamine is sold under the brand name Benadryl Allergy Relief in the United Kingdom by McNeil Laboratories. It should not be confused with Benadryl Once a Day which has cetirizine as the active ingredient and is also sold by McNeil in the UK. It is available as an over-the-counter medicine in the UK, and is available with or without pseudoephedrine under the Benadryl brand.
In the U.S., acrivastine is the active ingredient in the Semprex brand. Semprex-D also contains the decongestant pseudoephedrine. Semprex-D is marketed in the U.S. by Actient Pharmaceuticals.
Unlike cetirizine or loratadine, for which the standard dose is one tablet per day, a single acrivastine tablet may be taken up to three times a day. It is not to be taken by over 65s, pregnant women, or people with compromised liver or kidney function.
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