Medications and Drugs

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Brand Names: Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1

Generic Name: clemastine (Pronunciation: CLEM as teen)

• What is clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• What are the possible side effects of clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• What is the most important information I should know about clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• Who should not take clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• How should I take clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• What happens if I miss a dose (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• What happens if I overdose (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• What should I avoid while taking clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• What other drugs will affect clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?
• Where can I get more information?

What is clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?

Clemastine is an antihistamine. Clemastine blocks the effects of the naturally occurring chemical histamine in your body.

Clemastine is used to treat sneezing, runny nose, itching watery eyes, hives, rashes, itching, and other symptoms of allergies and the common cold.

Clemastine is may also be used for purposes other than those listed in this medication guide.

Clemastine 2.68 mg-TEV

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What are the possible side effects of clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?

Stop taking clemastine and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).

Other, less serious side effects may be more likely to occur. Continue to take clemastine and talk to your doctor if you experience

• sleepiness, fatigue, or dizziness;
• headache;
• dry mouth; or
• difficulty urinating or an enlarged prostate.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist, Tavist-1)?

Use caution when driving, operating machinery, or performing other hazardous activities. Clemastine may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities.

Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while you are taking clemastine.