How does Zyrtec (Cetirizine) work:

Zyrtec (Cetirizine) is a non-sedating antihistamine that is very popular for combatting allergies. It blocks the symptoms of runny nose, watery and itchy eyes, sneezing and hay fever, and brings relief so that you can still be at full alertness which lasts for 24 hours.

Dosage & Administration:

Take Zyrtec (Cetirizine) once a day. Take each dose of with a full glass of water. Zyrtec (Cetirizine) may be taken with or without food.

Side Effects:

• agitation
• dry mouth
• drowsiness
• headache
• symptoms of hypersensitivity

Precautions:

Inform your physician of your medical history, including all allergies, especially drug allergies. Tell your physician if you have kidney, liver, thyroid or heart disease. Tell your physician if you have high blood pressure, asthma or have ever had a seizure. Tell them if you drink alcohol. Consult your physician if you are pregnant, trying to become pregnant, or if you are breastfeeding. Inform them of all prescription medications you are currently taking, including those available without a prescription. It is especially important that your physician knows if you are taking other cough, cold or allergy medicines, antidepressants, sedatives, sleeping pills, tranquilizers, narcotics, barbiturates, psychiatric medicines, muscle relaxants, diet pills, high blood pressure medications, or medications for the treatment of anxiety. Since the prescription Zyrtec allergy medication may cause drowsiness or dizziness, do not drive or perform potentially dangerous tasks until you know how your body will respond to the Zyrtec allergy medication. Drinking alcohol may intensify drowsiness and dizziness while you take it.