Ketotifen may cause excessive drowsiness with alcohol.

Ketotifen 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....

Ketotifen is probably safe to use during breastfeeding. Limited human data suggests that the drug does not represent any significant risk to the baby.

It is not known whether Ketotifen alters the ability to drive. Do not drive if you experience any symptoms that affect your ability to concentrate and react.

There is limited information available on the use of Ketotifen in patients with kidney disease. Please consult your doctor.

There is limited information available on the use of Ketotifen in patients with liver disease. Please consult your doctor.