<p>There are no adequate data from the use of ketotifen eye drops in pregnant women. Systemic levels after ocular administration are much lower than after oral use. Caution should be exercised when prescribing to pregnant women. Although animal data following oral administration show excretion into breast milk, topical administration to humans is unlikely to produce detectable quantities in breast milk. ketotifen 0.25% eye drops can be used during lactation.</p>