Antihistamines work by restricting the body from producing a chemical called histamine. The release of histamine in the body causes common allergic reactions such as sneezing, hives and an itchy throat. While antihistamines are primarily used to...
Antihistamine therapy is your first line of defense against allergic rhinitis, commonly known as hay fever. Allergic rhinitis is one of the most common medical conditions in the United States, according to Capital Allergy and Respiratory Disease...
"Drugs often have several names. When a drug is first discovered, it is given a chemical name" that describes its molecular composition and what it does, according to Merck Medical in the "Home Health Handbook." Antihistamines are known by...
Patients who simply have trouble with antihistamine formulas can choose another treatment. Oral tablets and capsules to chew or swallow, granules to mix with food, nasal sprays and eye drops represent alternative administration methods. ...
Antihistamines are a class of medications indicated for the treatment of symptoms associated with allergies, including nasal congestion, sneezing or cough. A number of antihistamine medications are available over-the-counter or by prescription....
Histamine is a chemical that is released by the body as a reaction to an allergic substance. Antihistamines block the effects of this chemical on the respiratory system, helping to prevent or relieve the symptoms of allergies. Although quite...
Antihistamine medications reduce your body's reaction to allergens or block symptom-causing chemicals such as histamine, the Mayo Clinic reports. Some examples of antihistamine drugs include diphenhydramine, loratadine and cetirizine. These drugs...
Histamine is a natural compound in the body that triggers an inflammatory response due to allergens or injury. This natural compound increases blood flow to your cells, and helps your body fight infection. However, overproduction of histamine can...
Antihistamines are medications used to treat allergies and hypersensitive immune reactions. When an allergic reaction occurs, the body's immune system releases histamine. Antihistamines are used to ease symptoms related to allergies, such as...
Asthma occurs when a person encounters a trigger, such as an allergen, exercise or chemical. During an asthma attack, the bronchial airways become inflamed and swollen, which narrows the airways and makes breathing extremely difficult. Wheezing,...
There are some foods that contain the properties found in the antihistamine medication you might be familiar with from chemists and pharmacists. These natural antihistamines work towards naturally reducing the secretion of histamine--the...
Antihistamines fight the production of histamines during nasal inflammation, which is often triggered by allergic rhinitis. The resulting itching, sneezing, irritated eyes and runny nose can be chronic, seasonal or triggered by certain plants,...
Fifty million Americans have allergies, according to the Asthma and Allergy Foundation of America. Allergies are the result of histamine, a substance released when foreign particles invade the body and cause an immune response such as hives,...
When exposed to infection or injury, your body responds defensively, by unleashing an immune response that results in the release of fluids, antibodies and white blood cells to the affected area. This causes inflammation -- the familiar redness,...
Antihistamines are chemicals that block a histamine reaction, the process by which the body responds to allergens. Allergic reactions may be caused by toxins, dust or natural substances such as food or pollen. They are typically treated with...
Antihistamines are medications used for the treatment of any cause of itching. These treatments can apply to itching produced by insect bites, bee stings, poison ivy, chicken pox and allergies, reports William Sears, M.D., and Martha Sears, R.N....
Sea sickness is a common name given to motion sickness that occurs on a boat. Sea sickness symptoms include nausea and dizziness. Cold sweats and vomiting are also common with sea sickness. MayoClinic.com suggests that the more a person travels by...
According to Russell A. Settipane in an article in a 2003 issue of "Allergy and Asthma Proceedings," allergic rhinitis affects up to 30 percent of adults and 40 percent of children and is the sixth most common chronic disease in the United States....
Antihistamines are a class of drugs used to block the production, effectiveness or release of histamine, which is a chemical that causes inflammation and other allergy symptoms. Histamine is the chief chemical that causes most of the symptoms of...
Irritable bowel syndrome, or IBS, is an intestinal condition that affects up to 15 percent of the U.S. population. IBS typically begins in your teens or early 20s and causes intermittent bouts of abdominal pain and altered bowel movements. One of...
Antihistamines are medications used for the treatment of allergies, cold and flu symptoms, including sneezing, watery eyes, coughing, hives, runny nose and more. These medications are available by prescription and over the counter. Warning labels...
Allergies affect around half of all Americans. According to the American Academy of Allergy Asthma and Immunology, as many as 54.6 percent of all Americans test positive to at least one allergen. Most with allergies are also allergic to more than...
When your immune system overreacts to ingestion or inhalation of an otherwise harmless substance, it triggers an allergic reaction. The substance can be food, medicine or a plant. When pollen is the offending culprit, it's called hay fever. Upon...
Antihistamines are commonly used to combat a range of symptoms and conditions associated with the body's production of histamine. Antihistamines can be useful for athletes who experience allergy symptoms that impede performance. Other uses for...
Certain irritants or allergies can trigger an asthma attack, which causes the airways of the bronchial tubes to constrict, resulting in extreme difficulty in breathing due to the inflammation and increased mucous produced by the lungs, according...
Antihistamines are a common medication used to treat allergy symptoms that affect the nose, eyes and throat, according to NHS.uk. Most antihistamines are available over-the-counter in pill form for use without a prescription. Antihistamines are...
During allergic reactions—including both reactions to seasonal airborne allergens like pollen and reactions to food in sensitive individuals—immune cells secrete a chemical messenger called histamine. This chemical causes the classical...
Exercising is safe even when you suffer from a runny nose or other seasonal allergy symptoms. Taking an antihistamine to relieve your symptoms can make you feel better overall and might inspire you to exercise simply because you are feeling...
Antihistamines are used in order to suppress the body's histamine response to allergens. According to the American Academy of Allergy, Asthma and Immunology (AAAAI), antihistamines are available in two generations of treatment strength. Since they...
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