Medically reviewed by Lindsay Cook, PharmD Xyzal (levocetirizine) and Zyrtec (cetirizine) are antihistamines taken to relieve ...

Keep in mind that OTC medications can interact with other products you take, including vitamins, minerals, herbal remedies, other drugs, and even eye drops. For example, antacids such as Tums can ...

We also calculated the potential savings of going OTC, though your actual savings may depend on your insurance coverage. Why switch? Antihistamines block the chemical messenger histamine ...