What factors should be considered when choosing an antihistamine?

Sep 20, 2024 ... Cetirizine will start to work within one hour after you take it. It provides allergy relief for 24-hours. It relieves symptoms like sneezing, ... That said, Zyrtec is a fast-acting drug that starts to work in less than an hour the first time you take it. Cetirizine hydrochloride is also a fast-acting ... 6 days ago ... Note: Cetirizine is a derivative of piperazine and an H1 antagonist that binds competitively with histamine to H1 receptors on cell membranes. Original Prescription Strength - New Look - Same Relief - NDC 50580-726-71 - ZYRTEC - ® ALLERGY - Cetirizine HCl tablets - 10 mg /antihistamine - Indoor & ... For this reason, second-generation H1 antihistamines like Cetirizine (Zyrtec®) are preferred. Famotidine (Pepcid®) is an example of an H2 antihistamine that ... Aug 30, 2019 ... Normally, if you are younger than 65 years, you may be good to go with one tablet a day (with the maximum dose being 10 mg per day). However, if ... Apr 16, 2025 ... Cetirizine is an antihistamine medication commonly used to alleviate symptoms of allergies such as sneezing, itching, and a runny nose. The original triple-action, prescription-strength formula that works in minutes to deliver up to 12 hours of allergy eye itch relief. Every pregnancy starts out with a 3-5% chance of having a birth defect. This is called the background risk. Studies involving over 1,300 babies exposed to ... Cetirizine and pseudoephedrine is a combination of an antihistamine and a decongestant used to treat the symptoms of seasonal or yearly allergies.