ZYRTEC reg; is an antihistamine that helps to relieve allergy symptoms such as runny nose, red, itchy eyes and sneezing. Zyrtec works by blocking the effects of histamines. Zyrtec has received high marks for customer satisfaction in recent surveys.
Zyrtec 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. Zyrtec is also used in the treatment of chronic itchy skin and hives.
How To Take Zyrtec
Take Zyrtec by mouth usually twice daily with or without food; or as directed by your doctor. Zyrtec must be swallowed whole. Do not crush or chew the tablets. Zyrtec is not recommended for use in children under 12 years of age.
Zyrtec Side Effects
Drowsiness, dizziness, nervousness, nausea, headache, dry mouth, or unusual tiredness or weakness (fatigue) may occur. If any of these effects persist or worsen, notify your doctor. Tell your doctor immediately if any of these serious side effects occurs: irregular heartbeat, unusually fast heartbeat, uncontrolled muscle movements (tremor), rash, chest pain, trouble sleeping. Tell your doctor immediately if any of these unlikely but serious side effects occur: mental/mood changes, seizures, trouble breathing, trouble urinating, vision problems. If you notice other effects not listed above, contact your doctor or pharmacist.
Precautions for Zyrtec
Zyrtec is not recommended for use if you have the following medical conditions: glaucoma (narrow-angle type), problems urinating (e.g., enlarged prostate), severe high blood pressure, severe heart/blood vessel disease (coronary artery disease), any problems taking decongestants (e.g., symptoms include trouble sleeping, dizziness, weakness, tremor, or irregular heartbeat). Tell your doctor your medical history, especially of: kidney problems, liver problems, asthma, high blood pressure, diabetes, heart disease, thyroid problems, any allergies. Zyrtec may make you dizzy or drowsy; use caution engaging in activities requiring alertness such as driving or using machinery. Limit alcoholic beverages. Caution is advised when using Zyrtec in the elderly because they may be more sensitive to the effects of the drug. Zyrtec should be used only when clearly needed during pregnancy. Zyrtec passes into breast milk. Discuss the risks and benefits with your doctor.
Zyrtec is not recommended for use with, or within 14 days of taking MAO inhibitors (e.g., furazolidone, isocarboxazid, linezolid, moclobemide, phenelzine, procarbazine, selegiline, tranylcypromine). Tell your doctor of all prescription and nonprescription medication you may use, especially: certain blood pressure medicine (e.g., methyldopa), adrenalin-like medicine (e.g., ephedrine, methylphenidate), certain herbal products (e.g., ephedra). Tell your doctor if you take any drugs that cause drowsiness such as: medicine for sleep, sedatives, tranquilizers, anti- anxiety drugs (e.g., diazepam, lorazepam), narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., phenothiazines such as chlorpromazine or tricyclic antidepressants such as amitriptyline), anti-seizure drugs (e.g., carbamazepine), muscle relaxants, certain antihistamines (e.g., diphenhydramine). Check the labels on all your medicines (e.g., cough-and-cold products) because they may cause drowsiness.
The information contained on this website is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of Zyrtec is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.
Zyrtec Missed Dosage
If you miss a Zyrtec dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
Store Zyrtec at room temperature between 59 and 86 degrees F (15 and 30 degrees C) away from light and moisture.
Revision date: July 5, 2011
Last revised: by Sebastian Scheller, MD, ScD
Drugs & Medications
CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.
The drug reference included in this section is provided by Cerner Multum, Inc., of Denver, Colorado. Armenian Medical Network receives monthly updates from Multum.