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Zyrtec

Last reviewed on RxList: 7/31/2017
Zyrtec Side Effects Center

Last reviewed on RxList 7/31/2017

Zyrtec (cetirizine hydrochloride) is an antihistamine that treats symptoms, such as itching, runny nose, watery eyes, and sneezing from hay fever (allergic rhinitis) and other allergies, such as allergies to molds and dust mites. Zyrtec is available in generic form and over-the-counter (OTC). Common side effects of Zyrtec include:

  • drowsiness,
  • fatigue,
  • tired feeling,
  • dizziness,
  • dry mouth,
  • sore throat,
  • cough,
  • nausea,
  • constipation, or
  • headache.

In children, side effects of Zyrtec include:

The side effect of sleepiness may occur when taking Zyrtec, so do not drive a car or operate potentially dangerous machinery.

Zyrtec is available as regular tablets and chewable tablets (5 mg and 10 mg) and syrup (1 mg/mL). It is available as an over-the-counter (OTC) drug, so no prescription is needed. Zyrtec may interact with other medicines that make you sleepy (such as other cold or allergy medicine, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression, or anxiety). Tell your doctor all medications and supplements you use. Zyrtec should be used during pregnancy only if clearly needed, and it is not recommended for nursing mothers.

Our Zyrtec (cetirizine hydrochloride) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Zyrtec Consumer Information

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop taking this medicine and call your doctor at once if you have:

  • fast, pounding, or uneven heartbeat;
  • weakness, tremors (uncontrolled shaking), or sleep problems (insomnia);
  • severe restless feeling, hyperactivity;
  • confusion;
  • problems with vision; or
  • little or no urination.

Common side effects may include:

  • dizziness, drowsiness;
  • dry mouth;
  • nausea, constipation; or
  • tired feeling.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Zyrtec (Cetirizine)

Zyrtec Professional Information

SIDE EFFECTS

When Using This Product

  • drowsiness may occur
  • avoid alcoholic drinks
  • alcohol, sedatives, and tranquilizers may increase drowsiness
  • be careful when driving a motor vehicle or operating machinery

Stop use and ask a doctor if an allergic reaction to this product occurs. Seek medical help right away.

If Pregnant or Breast-feeding

if breast-feeding: not recommended
if pregnant: ask a health professional before use.

Read the entire FDA prescribing information for Zyrtec (Cetirizine)

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