hen flying is not safe. Antihistamines are a popular ingredient in allergy, cold, and flu medications. Some common antihistamines used are brompheniramine, chlorpheniramine, doxylamine, and diphenhydramine (Gislason, 2003). Antihistamines primarily help dry up secretions from upper respiratory mucous membranes(nose and sinuses) that cause runny nose and congestion. While some of the symptoms associated with an itchy nose, eyes, and sneezing are controlled, these are a result of the body's attempt to cure the problem.
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