Telfast may cause excessive drowsiness with alcohol.

Telfast may be unsafe to use during pregnancy. Although there are limited studies in humans, animal studies have shown harmful effects on the developing baby. Your doctor will weigh the benefits and any potential risks before prescribing it to you. P...

Telfast is safe to use during breastfeeding. Human studies suggest that the drug does not pass into the breastmilk in a significant amount and is not harmful to the baby. Because of low milk levels and lack of sleepiness, use of Telfast would not be ...

Telfast does not usually affect your ability to drive.

Telfast should be used with caution in patients with kidney disease. Dose adjustment of Telfast may be needed. Please consult your doctor. May cause excessive sleepiness in patients with end stage kidney disease.

Telfast is probably safe to use in patients with liver disease. Limited data available suggests that dose adjustment of Telfast may not be needed in these patients. Please consult your doctor.