An antihistamine is a type of medication that is used to relieve or prevent allergy symptoms such as runny nose, sneezing, and watery eyes. Antihistamines work by blocking histamine — a chemical ...

British pharmaceutical GSK announced in 2023 that it planned to stop producing its popular Zyrtec-D, an antihistamine and decongestant that contains pseudoephedrine, citing business reasons.

Even so, newer antihistamines like Allegra and Zyrtec are known to cause side effects like: Nausea Diarrhea Headache Back pain Lethargy According to a landmark 2010 study published in the journal ...

Any of the newer antihistamines, such as loratadine (Claritin, Alavert), desloratadine (Clarinex), cetirizine (Zyrtec), levocetirizine (Xyzal) and fexofenadine (Allegra), shouldn't make you feel ...

Some readers of The Straits Times have expressed concern after reading a report about pharmaceutical giant GSK’s decision to stop producing Zyrtec-D, its popular antihistamine and decongestant ...

an antihistamine approved for the treatment of both indoor and outdoor allergy symptoms Compare to the active ingredient of Zyrtec 24-HOUR ALLERGY RELIEF: Temporarily provides relief of symptoms ...