L Cetriver 5 mg MD Many allergic disorders are treated with tablets. The L Cetriver 5mg Tablet is a member of the class of medications known as antihistamines. It is used to treat a number of allergic diseases, including hay fever, conjunctivitis, hives, eczema, and reactions to stings and bites. Additionally, it relieves itching, sneezing, runny nose, and watery eyes.