Nonsedating antihistamine

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.Their main benefit is they primarily affect peripheral histamine receptors and therefore are less sedating.However, high doses can still induce drowsiness through acting on the central nervous system.

Many sedating antihistamines do not require a doctor's prescription.Non-sedating antihistamines are helping to improve the lives of countless people who suffer from the symptoms of serious allergic reactions.Although antihistamines are by no means a recent discovery, the development of the new class of non-sedating antihistamines allows many more allergy sufferers to benefit from the therapeutic effects of the drugs without experiencing their annoying and often unmanageable side effects such as sedation, which is a condition or state in which one feels overly calm and serene; it is akin to being tranquillized.Antihistamines are used in the treatment of allergic reactions, colds, hay fever, hives, and insect bites and stings.Some antihistamines may also be helpful in reducing anxiety, inducing sleep, or at preventing or treating motion sickness.When the body comes into contact with something to which it is allergic, whether through contact, respiration or consumption, substances called histamines are released to attack the allergen.

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