Preliminary evidence indicates that zolmitriptan levels in breastmilk are low. Amounts ingested by the infant are small and unlikely to affect the nursing infant, especially if the infant is older than 2 months. Concurrent use of propranolol might increase the zolmitriptan dose received by the breastfed infant substantially. Painful, burning nipples and breast pain have been reported after doses of sumatriptan and other triptans. This has occasionally been accompanied by a decrease in milk production.