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 ...

Zyrtec (cetirizine) is an over-the-counter (OTC) antihistamine commonly used to treat allergy symptoms, such as runny nose, ...

Immunotherapy aims to turn the body’s immune system into an ally in the fight against cancer. One way that can happen is by stimulating T cells to identify and kill unwanted tumor cells. Unfortunately ...