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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]
[8] [4] Common side effects include sleepiness, headache, and dry mouth. [8] [9] Serious side effects may include QT prolongation. [9] It is unclear if use during pregnancy or breastfeeding is safe. [8] It was first made by Union Chimique Belge in 1956 and was approved for sale by Pfizer in the United States later that year.
Dimetapp is an American brand of over-the-counter cold and allergy medicines that is manufactured by Foundation Consumer Brands. At one point, Dimetapp as a household word referred to a single combination preparation marketed to relieve symptoms of the common cold, containing brompheniramine (an antihistamine) and phenylephrine (decongestant replacing the formerly used pseudoephedrine, which ...
A subsequent 1990 study found that the elimination half-life of diphenhydramine was 5.4 hours in children, 9.2 hours in young adults, and 13.5 hours in the elderly. [7] A 1998 study found a half-life of 4.1 ± 0.3 hours in young men, 7.4 ± 3.0 hours in elderly men, 4.4 ± 0.3 hours in young women, and 4.9 ± 0.6 hours in elderly women. [84]
The original formula for Actifed contained pseudoephedrine hydrochloride 60 mg as the nasal decongestant and triprolidine hydrochloride 2.5 mg as the antihistamine. . However, in response to widespread laws requiring products containing pseudoephedrine to be kept behind the pharmacy counter, Pfizer changed Actifed's U.S. formula in late 2006 to contain phenylephrine HCl 10 mg as the nasal ...
Antihistamine medications are also helpful. [4] If the child encounters the allergen and shows signs of anaphylaxis, use the epinephrine auto-injector first, if available, and seek medical help immediately. Antihistamine medication can also help slow the reaction in addition to epinephrine if it has been approved for combination by your doctor. [4]
[14] [15] [1] In some countries, it is also indicated for the treatment of vasomotor rhinitis in adults and children ≥ 12 years old. [1] Azelastine eye drops are indicated for the local treatment of seasonal and perennial allergic conjunctivitis. [16] [2]
[4] The efficacy of rupatadine as treatment for allergic rhinitis (AR) and chronic idiopathic urticaria (CIU) has been investigated in adults and adolescents (aged over 12 years) in several controlled studies, showing a rapid onset of action and a good safety profile even in prolonged treatment periods of a year. [5] [6] [7]
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