Reactine Commercial early 2000's

Commercial for Reactine Allergy medication as broadcast sometime in the early 2000s

Cetirizine, sold under the brand name Zyrtec among others, is a second-generation antihistamine used to treat allergic rhinitis (hay fever), dermatitis, and urticaria (hives). It is taken by mouth. Effects generally begin within an hour and last for about a day. The degree of benefit is similar to other antihistamines such as diphenhydramine.

Common side effects include sleepiness, dry mouth, headache, and abdominal pain. The degree of sleepiness that occurs is generally less than with first-generation antihistamines. Serious side effects may include aggression and angioedema. The medication works by blocking histamine H1 receptors, mostly outside the brain.

It was patented in 1981 and came into medical use in 1987. It is available as a generic medication. In 2018, it was the 55th most commonly prescribed medication in the United States, with more than 13 million prescriptions.

Cetirizine is marketed under the brand names Alatrol, Alerid, Alzene, Cerchio, Cetirin, Cetriz, Cetzine, Cezin, Cetgel, Cirrus, Histec, Histazine, Humex, Letizen, Okacet (Cipla), Reactine, Razene, Rigix, Sensahist (Oethmann, South Africa), Triz, Zetop, Zirtec, Zirtek, Zodac, Zyllergy, Zynor, Zyrlek, and Zyrtec (Johnson & Johnson), among others.