Sedating side

These symptoms may be due to hay fever, other upper respiratory allergies, or the common cold.

They are sedating, which means they’re likely to make you drowsy after you use them.

They also don’t last as long in your system, so they require more frequent dosing than the newer generations.

You may have taken antihistamines in the past and found it hard to concentrate or stay awake.

For many people, sedating antihistamines, also called old, classic, or first-generation antihistamines, cause sleepiness, grogginess, and slow reaction time.

First-generation brands include Benadryl and Chlor-Trimeton. The first-generation antihistamine diphenhydramine is the main active ingredient in Benadryl.

Benadryl helps relieve runny nose, sneezing, itchy or watery eyes, and nose or throat itching.Other common brands with chlorpheniramine as a main active ingredient include: All of these side effects are more common in older people.If you have an enlarged prostate that makes it difficult for you to urinate, you should talk to your doctor before using first-generation antihistamines. You should also talk to your doctor before using these drugs if you have any of these health concerns: If you take other drugs that can make you drowsy, such as sedatives or tranquilizers, talk to your doctor before using first-generation antihistamines.Antihistamines work by decreasing the effects of histamine at certain cell receptors.Over-the-counter (OTC) antihistamines can help treat symptoms such as: First-generation OTC oral antihistamines, including diphenhydramine and chlorpheniramine, are the oldest group.Zyrtec can also be used to help relieve redness and itching due to hives.

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