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Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides relief from nasal congestion, sneezing, or hives caused by pollen, dust mites, or animal allergy with few side effects. [1]
The newer, second-generation H 1-antihistamines are far more selective for peripheral histamine H 1-receptors and have a better tolerability profile compared to the first-generation agents. The most common adverse effects noted for second-generation agents include drowsiness, fatigue, headache, nausea and dry mouth.
Allergy Tablet. Xyzal, a.k.a. levocetirizine, "is the best prescription-strength oral antihistamine," Dr. Li says. It helps with sneezing, a runny or itchy nose or itchy throat, and watery eyes.
H1-antihistamines are further split into three groups known as the first-generation, second-generation and third-generation antihistamines. Another type of antihistamines known as H2-antihistamines are used to treat gastrointestinal conditions caused by excessive stomach acid. [8] Mechanism
Ebastine is a H 1 antihistamine with low potential for causing drowsiness.. It does not penetrate the blood–brain barrier to a significant amount and thus combines an effective block of the H 1 receptor in peripheral tissue with a low incidence of central side effects, i.e. seldom causing sedation or drowsiness.
[medical citation needed] Loratadine is a long-acting antihistamine (H 1 histamine antagonist) that is less sedating than older substances of its type. [ medical citation needed ] In 2022, it was the 289th most commonly prescribed medication in the United States, with more than 500,000 prescriptions.
Levocetirizine, sold under the brand name Xyzal, among others, is a second-generation antihistamine used for the treatment of allergic rhinitis (hay fever) and long-term hives of unclear cause. [3] It is less sedating than older antihistamines. [4] It is taken by mouth. [3] Common side effects include sleepiness, dry mouth, cough, vomiting, and ...
In the United Kingdom, Benadryl can be found as Benadryl Allergy Relief. The main ingredient in this medication is acrivastine. Acrivastine is a non-drowsy antihistamine used to relieve allergies. It can treat hay fever, hives, insect bites and stings, conjunctivitis and eczema. [8] Benadryl Allergy Relief contains 8 mg of acrivastine in each ...