In November 2007 the US Food and Drug Administration (FDA) approved Zyrtec for use without a prescription by adults and children, in all its forms: tablets, chewable tablets and syrup.
Its active ingredient is cetirizine hydrochloride. It is used by adults and children aged 2 and over to relieve hay fever and other respiratory allergy symptoms (sneezing, a runny nose, an itchy nose or throat, watery eyes), and to treat hives in people aged 6 and over.
In some people Zyrtec can cause drowsiness, tiredness and a dry mouth.
On 9 November the FDA also approved Zyrtec-D without a prescription. Besides cetirizine, it contains pseudoephedrine hydrochloride. Because of the pseudoephedrine, Zyrtec-D sales are restricted under the US law against methamphetamine abuse.
Zyrtec-D has the same uses as Zyrtec, plus relief of a blocked nose. It is not used for hives.
Zyrtec is made by McNeil Consumer Healthcare.
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