antihistamine list of medications
Topical antihistamines. What are Topical antihistamines. Topical antihistamine products are where antihistamines have been incorporated in creams, nasal sprays and other agents that can be applied locally (for example to the skin) to treat allergic reactions. Antihistamines block the histamine receptors, which when activated cause allergic reactions such as hay fever, itching and rash. Topical antihistamines are used to relieve the symptoms of hay fever, itching and to resolve rashes due to allergy. These can be thought of as the old-fashioned group of antihistamines. Diphenhydramine (Benadryl) is one of the most common first generation H1-receptor blockers. Other examples include clemastine (Tavist), dimenhydrinate (Dramamine), promethazine (Phenergan) and hydroxyzine (Vistaril, Atarax). The term, antihistamine generally is used for medications used to treat various symptoms believed to be caused by histamine, for example, as part of the common cold, including: 1  Congestion. 2  Runny nose. 3  Sneezing. Itchy throat. 4  Hives. Skin rashes. 5  Itching. Itchy or watery  eyes. Antihistamines have been used for years to treat allergy symptoms. They can be taken as pills, liquid, nasal spray, or eye drops. Over-the-counter (OTC) antihistamine eye drops can relieve red itchy eyes, while nasal sprays can be used to treat the symptoms of seasonal or year-round allergies. List of Antihistamines. Pharmacist holding a large bottle of antihistamines. Antihistamines have a broad range of functions -- they can ease allergy symptoms, alleviate gastrointestinal complaints, prevent motion sickness and aid in sleep, to name just a few. Antihistamines accomplish these tasks by counteracting histamine, an important protein with diverse effects in the body. These antihistamines will not be discussed further.) Antihistamines also may be used to treat motion sickness, insomnia (difficulty sleeping), and anxiety. Antihistamines work by blocking the effects of a chemical called histamine that is responsible for many allergic symptoms. An antihistamine is a type of pharmaceutical drug that opposes the activity of histamine receptors in the body. Antihistamines are subclassified according to the histamine receptor that they act upon: the two largest classes of antihistamines are H1-antihistamines and H2-antihistamines. List of Antihistamines. If your appointment is for an allergy condition that may require allergy skin testing to help. diagnose your condition you may stop taking any antihistamines at least one week prior to their. appointment. Antihistamines can interfere with the results of the testing resulting in a false. negative. What types of OTC antihistamines are available? Over-the-counter (OTC) medicines are medicines you can buy without a prescription from your doctor. Antihistamines help relieve or prevent allergy symptoms. Two types of OTC antihistamines are available: first-generation and second-generation antihistamines. Both types can be useful for allergies. First-generation antihistamines are also sometimes used in OTC cold medicines. Allergy Treatments. In general, there is no cure for allergies, but there are several types of medications available -- both over-the-counter and prescription -- to help ease and treat annoying symptoms like congestion and runny nose. These allergy drugs include antihistamines, decongestants, combination drugs, corticosteroids, and others.
Clemastine, dimenhydrinate, promethazine, hydroxyzine and Diphenhydramine