Brand name:
Zyrtec /Cetirizine / Zirtec
Pronounced: ZEER-tek
Generic name: Cetirizine hydrochloride
Why is Zyrtec / Zirtec / Cetirizine prescribed?

Zyrtec is an antihistamine. It is prescribed to treat the sneezing; itchy, runny nose; and itchy, red, watery eyes caused by seasonal allergies such as hay fever. Zyrtec also relieves the symptoms of year-round allergies due to dust, mold, and animal dander. This medication is also used in the treatment of chronic itchy skin and hives.
Most important fact about Zyrtec

Zyrtec may cause drowsiness. Be especially careful driving or operating dangerous machinery or participating in any hazardous activity that requires full mental alertness until you know how you react to Zyrtec.
How should you take Zyrtec?

Take Zyrtec once a day, exactly as prescribed. This medication can be taken with or without food.Zyrtec may make your mouth dry. Sucking hard candy, chewing a stick of gum, or melting bits of ice in your mouth can provide relief.

Why should Zyrtec not be prescribed?

Avoid Zyrtec if it causes a reaction, or if you have ever had a reaction to the similar drug Atarax.
Special warnings about Zyrtec .If you have kidney or liver disease, be sure to tell your doctor. Your dose of Zyrtec may have to be reduced.
Possible food and drug interactions when taking Zyrtec.You should avoid drinking alcohol or taking sedatives, tranquilizers, sleeping pills, or muscle relaxants while using Zyrtec. They can lead to increased drowsiness and reduced mental alertness. Among the products to avoid are the following:

Antidepressants such as Tofranil, Elavil, Ludiomil, and Anafranil
Muscle relaxants such as Valium and Soma
Pain-relieving narcotics such as codeine, Demerol, and Percocet
Sedatives such as Nembutal, Seconal, and phenobarbital
Sleeping pills such as Halcion, Restoril, and Ambien
High doses of theophylline (Theo-Dur)
Special information if you are pregnant or breastfeeding

The effects of Zyrtec during pregnancy have not been adequately studied. If you are pregnant or plan to become pregnant, tell your doctor immediately. Zyrtec appears in breast milk and should not be used if you are breastfeeding.
Recommended dosage for Zyrtec.ADULTS AND CHILDREN 12 YEARS AND OLDER
Any medication taken in excess can have serious consequences. In adults, the primary symptom of a Zyrtec overdose is extreme sleepiness. In children, restlessness and irritability may precede drowsiness. If you suspect an overdose, seek medical treatment immediately.

If you miss a dose ...

If you are taking Zyrtec on a regular schedule, take the forgotten dose as soon as you remember. If it is almost time for your next dose, skip the one you missed and go back to your regular schedule. Do not take 2 doses at once.

Storage instructions...

Store the tablets and syrup at room temperature. The syrup may be refrigerated.
Zyrtec side effects

Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Zyrtec.* Side effects in adults may include: Drowsiness, dry mouth, fatigue * Side effects in children aged 6 to 11 may include:
Abdominal pain, coughing, diarrhea, headache, nosebleed, sleepiness, sore throat, wheezing