Not Medical Advice: The round white pill with imprint N004 has been identified as Hydroxyzine hydrochloride 25 mg.
It is used in the treatment of anxiety; pain; sedation; allergic urticaria; allergies (and more), and belongs to the drug classes antihistamines, miscellaneous anxiolytics, sedatives and hypnotics.
Hydroxyzine reduces activity in the central nervous system. It also acts as an antihistamine that reduces the natural chemical histamine in the body.
It is not easy to avoid most allergens, but avoidance of ‘triggers’ is clearly the best treatment for allergic disease. Check out some tips on how to avoid common allergens at Bidmc.org.