Examples of sedating antihistamines
It helps relieve runny nose, sneezing, itchy and watery eyes, and itching of the nose or throat due to hay fever or other upper respiratory allergies.
Allegra can also be used to treat hives and skin rash.
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.
First-generation brands include Benadryl and Chlor-Trimeton. The first-generation antihistamine diphenhydramine is the main active ingredient in Benadryl.Also, these drugs work longer in your body so you need fewer doses.Cetirizine is the main active ingredient in Zyrtec.This histamine can then bind with receptors to trigger increased blood flow to the surrounding area, which can lead to symptoms such as swelling and increased secretions, resulting in a blocked or a runny nose, watery eyes and, most importantly, itchiness.Antihistamines don’t stop allergic reactions from happening, but they do block the histamine receptors from being able to be triggered by the histamine that is released, reducing your symptoms.