Cyclizine Side Effects

For the Consumer

Applies to cyclizine: oral tablet

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
• Feeling very tired or weak.
• Not able to pass urine.

What are some other side effects of this drug?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

• Feeling sleepy.
• Dry mouth.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.

For Healthcare Professionals

Applies to cyclizine: oral tablet, oral tablet chewable

Nervous system

Nervous system side effects have included drowsiness and sedation in many patients. Motor skills may be impaired. Cyclizine may also cause restlessness, excitation, nervousness, and insomnia.^[Ref]

Lingual-facial-buccal dyskinesias and generalized chorea occurred in an elderly patient, most probably due to the anticholinergic activity of cyclizine.^[Ref]

Cardiovascular

Cardiovascular side effects have included hypotension, tachycardia, and palpitations. Cardiovascular changes recorded after intravenous administration of cyclizine have included increase in heart rate, decrease in cardiac output, and increases in right atrial, pulmonary arterial, pulmonary artery wedge, and systemic arterial pressures.^[Ref]

Gastrointestinal

Gastrointestinal side effects have been mild in nature. These have included nausea, dry mouth, and constipation.^[Ref]

Ocular

Ocular side effects have included blurred vision, diplopia, and dry eyes due to its anticholinergic effects.^[Ref]

Genitourinary

Genitourinary side effects have included urinary retention and dysuria.^[Ref]

Hepatic

Hepatic side effects have included a case report of hepatitis in at least one child. This side effect was confirmed upon drug rechallenge.^[Ref]

Hypersensitivity

Hypersensitivity side effects have included fixed drug eruptions.^[Ref]

Some side effects of cyclizine may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

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