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Terfenadine is used in the treatment of allergic disorders.

How it works

Terfenadine belongs to class of drugs called antihistamines. It blocks histamine action, which responsible for causing allergies and inflammation.

Common side effects

Increased sensitivity to light, Allergic hepatitis (viral infection of liver), Flushing, Allergic reaction, Swelling of tongue, Angioedema (swelling of deeper layers of skin), Burning sensation, Depression, Skin peeling, Drowsiness, Sleepiness, Dry mouth, Fatigue, Hair loss, Weight gain, Increased appetite, Eye swelling, Lip swelling, Nausea, Vomiting


Expert advice

• Tell your doctor if you have enlarged prostate or problems in urination.
• You may regularly monitored for change in potassium levels in your blood as it terfenadine is known to lower the levels of potassium
• Do not drive or operate machinery while taking terfenadine as it may cause dizziness.
• Should not be given to patients allergic to terfenadine or any of its ingredients.

Frequently asked questions


Q.Is terfenadine the same as fexofenadine?
Terfenadine and fexofenadine are drugs of same class and used for allergic conditions

Q.Why is terfenadine banned?
Terfenadine is banned because of the fatal side effects it may cause.

Content on this page was last updated on 30 September, 2016, by Dr. Varun Gupta (MD Pharmacology)