Tavist Side Effects

Generic Name: clemastine

Please note - some side effects for Tavist may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).

Side Effects of Tavist - for the Consumer

Tavist-1

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Tavist-1:

Dizziness; drowsiness; dry mouth, throat, and nose; excitability; thickening of mucus in nose or throat.

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); convulsions; fast heartbeat or pounding in the chest; decreased alertness; hallucinations; tremor; wheezing.

Tavist ND

All medicines may cause side effects, but many people have no, or minor, side effects. No COMMON side effects have been reported with Tavist ND. Seek medical attention right away if any of these SEVERE side effects occur when using Tavist ND:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); severe or persistent dizziness.

Side Effects by Body System

Nervous system

Nervous system side effects have included central nervous system depression which has commonly resulted in drowsiness, dizziness, and headache. Dyskinesias have rarely been reported following chronic use of antihistamines.

Nearly all patients experience drowsiness. This drowsiness may subside in some patients with extended use. Patients should be warned against driving, as well as concomitant ingestion with alcohol and other sedative-hypnotic drugs.

Few cases of dyskinesias and tremors, often of the face, have been reported in patients whose chronic use of antihistamines extended over a period of 3 to 10 years. Some of these cases were only partially relieved by discontinuation of the drug. Haloperidol was successful in relieving symptoms.

Gastrointestinal

Gastrointestinal side effects have included dry mouth and constipation due to anticholinergic effects. This has occurred in up to one-third of patients.

Cardiovascular

Cardiovascular side effects have included hypotension, tachycardia, and palpitations.

Ocular

Ocular effects are due to the anticholinergic effects and may include blurred vision, diplopia, and dry eyes.

Genitourinary

Genitourinary side effects have included dysuria, urinary hesitancy, decrease in urine flow, and in rare cases, acute urinary retention.

Hematologic

Hematologic side effects that have been reported with antihistamines include bone marrow suppression, thrombocytopenia, and aplastic anemia.

A fatal case of agranulocytosis has been reported in a patient taking chlorpheniramine, pseudoephedrine, acetaminophen, dextromethorphan, phenylpropanolamine, and aspirin. Chlorpheniramine was felt to be the cause.

Respiratory

Respiratory side effects have included thickening of bronchial secretions, wheezing, and tightness in the chest.

Dermatologic

At least one case of toxic pustuloderma has been reported during clemastine therapy.

Dermatologic side effects have included toxic pustuloderma.

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