For Antihistamines we have terms and definitions in 6 topics. The topics are Erectile Dysfunction, Female Health, Health, Lymphoma, Women's Health and Womens Health.

Medications used to treat allergic reactions or allergies.
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A class of drugs used to counter the effect of histamine, a chemical produced by the body when an allergen is present, and one that causes many allergy symptoms. Can be used to relieve sneezing and itchy eyes, nose and throat and to control nasal swelling and draining. Available in both over-the-counter and prescription forms. Can also be used to treat some cases of insomnia.
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Drugs that block the effects of histamine, a chemical released in body fluids during an allergic reaction, and which reduce itching, sneezing, and runny nose
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Drugs used in the treatment of allergy symptoms.
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Drugs that are used to prevent or relieve the symptoms of hay fever and other allergies by preventing the action of a substance called histamine, which is produced by the body. Histamine can cause itching, sneezing, runny nose, watery eyes, and sometimes can make breathing difficult. Some of these drugs are also used to prevent motion sickness, nausea, vomiting, and dizziness. Since they may cause drowsiness as a side effect, some of them may be used to help people go to sleep.
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Drugs that are used to prevent or relieve the symptoms of hay fever and other allergies by preventing the action of a substance called histamine, which is produced by the body. Histamine can cause itching, sneezing, runny nose, watery eyes, and sometimes can make breathing difficult. Some of these drugs are also used to prevent motion sickness, nausea, vomiting, and dizziness. Since they may cause drowsiness as a side effect, some of them may be used to help people go to sleep.
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