Anti-histamines combined with a decongestant are usually marked with a "D." Claritin-D, Allegra-D, and Zyrtec-D all contain a decongestant called pseudoephedrine, the same active ingredient that ...

Antihistamines — like Claritin, Allegra, or Zyrtec — can reduce most of these allergy symptoms and will likely be your first option. However, if nasal congestion or a stuffy nose is one of ...

Out of 2,000 survey respondents, 50% of people reported using antihistamine pills like Allegra, Benadryl, and Zyrtec in 2021 ...