Antiallergic drugs

Antihistamines are a class of drugs commonly used to treat symptoms of What are allergies? Your body protects you from many threats. Your ribs protect your heart and lungs from injury. Your skin protects your body from outside elements like sun, wind and bacteria that can cause disease and infections. Your eyelashes protect your eyes from debris. And your body’s internal protection system – your immune system – battles substances that enter your body that are deemed “foreign.” An allergy occurs when your immune system overreacts to the “foreign” substance. In the case of an allergy, substances that are usually harmless and don’t bother some people, such as dust or animal dander, do bother you! Your body views these substances as “foreign,” which then triggers an overreaction by your body’s defense system that includes the release of histamine. The substances that trigger the overreaction are called allergens. The symptoms that result are called an allergic reaction. Allergies are one of the most common chronic conditions in the world. Some 40 million to 50 million people in the United States have them. What is histamine? What are some of the substances, or allergens, that cause allergies? The top eight most common things that can cause an allergic reaction in some people include: • Food. • Dust. • Pollen. • Pet dander, saliva or urine. • Mold. • Insect bites and stings. • Latex. • Certain medications/drugs. What allergic symptoms do histamines cause? Too much histamine, ca...

A collection of symptoms, predominantly in the nose and eyes, that occur after exposure to airborne particles of dust or dander or to pollens of certain seasonal plants in people that are allergic to these substances (see also allergies; asthma; allergy to mold, dander, dust). See also: Drugs used to treat Allergic Rhinitis The following list of medications are in some way related to or used in the treatment of this condition. Rx/OTC B N Generic name:loratadine systemic Brand names: Claritin, Alavert, Allergy Relief Tablets, Claritin Reditabs, Allergy Relief 24 Hour, Children's Claritin Allergy, ohm Allergy Relief, Tavist ND, Wal-itin Drug class: For consumers: For professionals: Expand current row for information about Flonase 4.4 reviews Rx/OTC B N X Generic name:diphenhydramine systemic Brand names: Benadryl, Benadryl Allergy, Allermax, Banophen, Complete Allergy Relief, Dicopanol, Diphedryl, Diphen, Dytuss, Scot-Tussin Allergy, Siladryl Allergy, Twilite, Valu-Dryl, Vanamine PD Drug class: For consumers: For professionals: Expand current row for information about levocetirizine 6.1 reviews Legend Rating For ratings, users were asked how effective they found the medicine while considering positive/adverse effects and ease of use (1 = not effective, 10 = most effective). Activity Activity is based on recent site visitor activity relative to other medications in the list. Rx Prescription only. OTC Over-the-counter. Rx/OTC Prescription or Over-the-counter. Off-label This me...

Allergies are an overreaction by your immune system to a substance or food that is not considered harmful to most other people. Substances that cause allergies are called allergens or “triggers”. What Causes Allergies? When you have allergies, your immune system mistakes normally harmless substances for dangerous invaders and produces antibodies to fight them. These antibodies release chemicals, such as histamine, that cause allergy symptoms. The most common allergens are: • Animal fur or hair (such as that from cats, dogs, horses, or rabbits) • Dust mites • Food, especially cow’s milk, eggs, peanuts, seafood, soy, tree nuts (almonds, Brazil nuts, cashews) and wheat • Insect stings • Latex • Medicines • Mould • Pollen. An allergen for one person may not cause any problems in another person. There is a link between allergy and asthma. What are the Symptoms of Allergies? Reactions to the same allergen vary among individuals and depend on how the allergen entered the body (for example, being bitten by a mosquito causes a localized reaction on the skin whereas exposure to pollen may cause a tickly throat and itchy eyes). Symptoms may include: • Abdominal pain, diarrhea, nausea, vomiting (food allergies) • Areas of swelling and redness where a person has been stung or bitten (for insect bites/stings) • Cough, chest tightness, wheezing or shortness of breath • Itching of the nose, eyes or roof of the mouth • A skin rash or hives, usually accompanied by body-wide itching • Runny,...

Name Anti-Allergic Agents Accession Number DBCAT000133 Description Agents that are used to treat allergic reactions. Most of these drugs act by preventing the release of inflammatory mediators or inhibiting the actions of released mediators on their target cells. (From AMA Drug Evaluations Annual, 1994, p475) Drugs Drug Drug Description A pyrano quinoline used to treat allergic conjunctivitis. A histamine H1 antagonist used to treat allergic conjunctivitis and rhinitis. A histamine H1 receptor blocker and mast cell stabilizer used to treat mild atopic asthma and allergic conjunctivitis. An ophthalmic agent used for the treatment of the ocular disorders referred to by the terms vernal keratoconjunctivitis, vernal conjunctivitis, and vernal keratitis. A monoclonal anti-immunoglobulin E antibody used in the treatment of severe asthma and chronic idiopathic urticaria. An antihistamine with sedative and anticholinergic effects used to treat the symptoms of allergic rhinitis. An ophthalmic corticosteroid used for the relief of inflammation located in both the palpebral and bulbar conjunctiva, the cornea, and the anterior segment of the globe of the eye. A selective Histamine-1 antagonist drug used in allergic rhinitis and chronic urticaria. A sedating antihistamine combined with pseudoephedrine and guaifenesin in various types of cold and allergy medications to relieve allergy symptoms, hay fever and common cold symptoms, and to aid in sleep. A combined serotonin and histamine a...

Antihistamines block histamine, a symptom-causing chemical released by your immune system during an allergic reaction. Pills and liquids Oral antihistamines are available over-the-counter and by prescription. They ease a runny nose, itchy or watery eyes, hives, swelling, and other signs or symptoms of allergies. Because some of these drugs can make you feel drowsy and tired, take them with caution when you need to drive or do other activities that require alertness. Antihistamines that tend to cause drowsiness include: • Diphenhydramine • Chlorpheniramine These antihistamines are much less likely to cause drowsiness: • Cetirizine (Zyrtec, Zyrtec Allergy) • Desloratadine (Clarinex) • Fexofenadine (Allegra, Allegra Allergy) • Levocetirizine (Xyzal, Xyzal Allergy) • Loratadine (Alavert, Claritin) Nasal sprays Antihistamine nasal sprays help relieve sneezing, itchy or runny nose, sinus congestion, and postnasal drip. Side effects of antihistamine nasal sprays might include a bitter taste, drowsiness or feeling tired. Prescription antihistamine nasal sprays include: • Azelastine (Astelin, Astepro) • Olopatadine (Patanase) Eyedrops Antihistamine eyedrops, available over-the-counter or by prescription, can ease itchy, red, swollen eyes. These drops might have a combination of antihistamines and other medicines. Side effects might include headache and dry eyes. If antihistamine drops sting or burn, try keeping them in the refrigerator or using refrigerated artificial-tear drops be...