Cetirizine is an over-the-counter (OTC) antihistamine. Pseudoephedrine is a decongestant. Zyrtec-D is an OTC combination medication of the two. Decongestants help relieve nasal congestion by ...

These include Zyrtec, Xyzal, Allegra, and Claritin (or their generic formulation). Another option for an OTC allergy medicine ...

Antihistamine and decongestant medication Zyrtec-D is no longer being produced and, in most markets including Singapore, is no longer available for sale at most clinics and pharmacies. This follows a ...