what is an antihistamine
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What is an Antihistamine? An antihistamine is a type of drug used to fight allergic reactions. It encompasses a broad class of drugs that can treat conditions ranging from minor to life threatening.
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Medical Dictionary Brompheniramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Dextromethorphan is a cough suppressant. It affects the signals in the brain that trigger cough reflex.
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Benadryl Benadryl® (diphenhydramine hydrochloride) is an antihistamine medication available both over the counter and with a prescription. It comes in many different forms and is used for a variety of different purposes. (Click Benadryl Uses for more information, including possible off-label uses.)
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Antihistamine 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. 1 -antihistamines work by binding to histamine H1 receptors in mast cells, smooth muscle, and endothelium in the body as well as in the tuberomammillary nucleus in the brain; H 2 -antihistamines bind to histamine H2 receptors in the upper gastrointestinal tract, primarily in the stomach.
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Antihistamine Although typical people use the word “antihistamine” to describe drugs for treating allergies, doctors and scientists use the term to describe a class of drug that opposes the activity of histamine receptors in the body.
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- Antihistamines are a type of medicine that's often used to treat a number of allergic health conditions. Although antihistamines can't cure these conditions, they often provide relief from symptoms. For example, antihistamines may be used to treat: hay fever. allergic rhinitis – inflammation of the nose due to an allergic reaction to substances such as dust mites.
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Benadryl Benadryl (diphenhydramine) is an antihistamine used for allergies, hives, insomnia, motion sickness, and mild cases of Parkinsonism. A generic formulation is available.
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- Chlorpheniramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Chlorpheniramine is used to treat runny nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.
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ANTIHISTAMINE The noun ANTIHISTAMINE has 1 sense: 1. a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site.Familiarity information: ANTIHISTAMINE used as a noun is very rare.enadryl; diphenhydramine (antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness). Dimetapp (trade name for a drug containing an antihistamine and a decongestant; used to relieve nasal congestion and to treat rhinitis).
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- Benadryl(®) is an over-the-counter medicine often used for the treatment of allergies in dogs. Diphenhydramine, the most common active ingredient, is an H1 antagonist, which in technical jargon means it inhibits the uptake of histamine by synapses in the brain and by the synapses of other nerve cells around the body.
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- Antihistamines work by altering the way cells are affected by a substance called histamine. Histamine is a chemical the immune system uses to help protect the body's cells against infection. Usually histamine is a useful substance, but if you're having an allergic reaction it's sometimes necessary to block its effects.
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loratadine antihistamine. Any substance that reduces the effect of histamine or blocks histamine receptors, usually the histamine 1 (H1) receptor. It is used in the treatment of allergic conjunctivitis and also in the temporary relief of minor allergic symptoms of the eye. Common agents include antazoline sulfate, azelastine hydrochloride, cetirizine, chlorphenamine, emedastine, epinastine hydrochloride, ketotifen, levocabastine, loratadine and olopatadine.
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Benadryl: Topical cream Histamine antagonists or antihistamines are drugs that relieve allergy symptoms. Histamine is a chemical used to identify and remove substances that trigger an allergic response.
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Antihistamines and How They're Used Antihistamines are frequently used for the treatment of other allergic conditions, although they may not be as effective as they are for hay fever and hives. 1  These conditions may include: 2  The common cold. 3  Itching of the skin (pruritus) 4  Insect stings and bites. 5  Allergic reactions to medications. 6  Anaphylaxis.
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Description and Brand Names Descriptions. Antihistamines are used to relieve or prevent the symptoms of hay fever and other types of allergy. They work by preventing the effects of a substance called histamine, which is produced by the body. Histamine can cause itching, sneezing, runny nose, and watery eyes.
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Antihistamine 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.
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- Antihistamine. Antihistamine with sedative properties. Used for treating. sneezing, watery & itchy eyes, runny nose, hives, rash, itching. sneezing, watery eyes, runny nose, hives, rashes, itching, coughs. sneezing, runny nose, itchy watery eyes, hives, rashes, itching. seasonal allergic rhinitis, hives, insomnia.
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What Is a Non-Sedating Antihistamine? Antihistamines block histamines, thereby preventing some or all of the allergen's effects, but early antihistamines often caused drowsiness. A non-sedating antihistamine is one that is less likely to cause patients to feel sleepy or tired.
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Benadryl Benadryl ® (diphenhydramine hydrochloride) is an antihistamine medication available both over the counter and with a prescription.It comes in many different forms and is used for a variety of different purposes.enadryl ® (diphenhydramine hydrochloride) is an antihistamine medication available both over the counter and with a prescription.
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Antihistamines: Understanding Your OTC Options 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. Taking more than the recommended amount can be dangerous. 2  If you are taking a prescription medicine, ask your doctor if it’s okay to also take an OTC antihistamine. 3  Don’t use more than 1 OTC antihistamine at a time unless your doctor says it’s okay.
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- Meaning of “antihistamine” in the English Dictionary. See all translations. uk ​ /ˌæn.tiˈhɪs.tə.mɪn/ /ˌæn.tiˈhɪs.tə.miːn/ us ​ /ˌæn.t̬iˈhɪs.tə.mɪn/ /ˌæn.t̬iˈhɪs.tə.miːn/. › a type of drug that is used to treat medical conditions caused by an extreme reaction to particular substances: Antihistamine is often used to treat hay fever and insect bites.
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- A: Benadryl (diphenhydramine) is an antihistamine; it works by blocking the effects of the naturally occurring chemical histamine in the body. It is safe for people with asthma to use diphenhydramine.
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Antihistamines What are antihistamines? Antihistamines are medicines that help stop allergy symptoms. These symptoms include: itchy eyes; sneezing; runny nose or congestion; skin rashes such as hives. They are normally taken by mouth. They come in tablets, capsules, chewable tablets, and liquids. Many people buy them over the counter (OTC) at a store. You can also get them through a prescription from your doctor. Antihistamines are generally considered safe for most people. This includes adults, children over the age of 2, and older people.
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Diphenhydramine vs Fexofenadine Diphenhydramine is an antihistamine used to relieve symptoms of allergy, hay fever, and the common cold. These symptoms include rash, itching, watery eyes, itchy eyes/nose/throat, cough, runny nose, and sneezing. It is also used to prevent and treat nausea, vomiting and dizziness caused by motion sickness. Diphenhydramine can also be used to help you relax and fall asleep.