Nonsedating antihistamine

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sedate - dignified and somber in manner or character and committed to keeping promises; "a grave God-fearing man"; "a quiet sedate nature"; "as sober as a judge"; "a solemn promise"; "the judge was solemn as he pronounced sentence"serious - concerned with work or important matters rather than play or trivialities; "a serious student of history"; "a serious attempt to learn to ski"; "gave me a serious look"; "a serious young man"; "are you serious or joking?

Antihistamines are commonly used to treat the symptoms of allergies and reactions to bites and stings.

Examples of over-the-counter non-sedating antihistamines include the brand names Claritin®, Allegra®, and Zyrtec®.

Many types of antihistamines are available without a prescription.Antihistamines block histamines, thereby preventing some or all of the allergen's effects, but early antihistamines often caused drowsiness.A non-sedating antihistamine is one that is less likely to cause patients to feel sleepy or tired.Although pharmaceutical manufacturers describe some of their products as non-sedating antihistamines, some patients do experience drowsiness, fatigue, impaired motor responses and concentration difficulties when taking them.On the other hand, some patients experience none of these symptoms when taking sedating antihistamines.

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