Last Edited: April 16th, 2012

Coupons for Zyrtec

Zyrtec is an allergy medicine that’s taken to suppress the effects of histamine, which causes the allergy symptoms of runny nose, watery, itching eyes and sneezing. It also treats the symptoms of chronic hives, which are itching weals over the body. Zyrtec comes in the form of a white rectangular tablet, or a round, white, purple or yellow pill.


Zyrtec should be taken as prescribed by the physician or according to the label. The patient should be careful to not use it in larger or smaller doses and shouldn’t take an extra dose if they forget and miss a dose. A chewable table has to be chewed before it’s swallowed, or it might not work as well. A tablet that's suppose to dissolve on the tongue must also be allowed to dissolve without it being chewed, but can be taken with water. Liquid Zyrtec also should be measured with the measuring cup or spoon that comes with the medication and not a regular spoon. A mismeasured dosage can also affect the effectiveness of the drug.

Side Effects

Some complications or side effects of taking Zyrtec include dizziness or fatigue, dry mouth or sore throat, nausea, constipation, cough or headache. The patient might consult their doctor if they have these side effects.

However, the patient should call their doctor right away if they their heart speeds up, pounds, or beats irregularly, or if they’re extremely restless, confused or experience visual disturbances. They should also call the doctor if they can’t urinate or urinate much less than they usually do.

An allergic reaction to Zyrtec is a medical emergency. The signs are hives and swelling of the face, throat, tongue or lips that can interfere with breathing. The patient should also go to the emergency room if they’ve believed they've overdosed on Zyrtec. The signs of an overdose are agitation, followed by drowsiness.

Who Shouldn’t Take Zyrtec?

Zyrtec shouldn’t be taken by people who need to drive or operate heavy machinery or by people who are allergic to cetirizine, which is the generic name for Zyrtec. Alcohol can worsen the side effects of Zyrtec and some drugs can intensify the sleepiness some people feel when they’ve taken the drug. These drugs include sleeping pills, narcotics, other allergy medicines and antidepressants.

Zyrtec is listed by the FDA as a Category B drug, which means it probably won’t harm an unborn baby. However, if a woman is breastfeeding she should let her doctor know before she takes Zyrtec, as the drug may pass through the milk. Elderly patients may also not need as high a dose of the drug as younger patients.

What To Tell The Doctor

A patient who wants to start a course of Zyrtec should tell their doctor every drug that they're taking, whether they're over the counter drugs or prescription drugs. They should also let the doctor know if they're taking vitamins or herbal remedies. The patient should let the doctor know of they have any medical conditions that Zyrtec may affect, or if they’re pregnant or planning to become pregnant.