Is Tocainide safe while breastfeeding?
Here is what NIH LactMed, the U.S. National Library of Medicine's authority on medicines and breastfeeding, reports about Tocainide. This is a summary of that source — not our own verdict.
Effects on the breastfed infant
Relevant published information was not found as of the revision date.
Effects on milk supply
Relevant published information was not found as of the revision date.
Levels in milk
Maternal Levels. One woman taking tocainide 400 mg every 8 hours orally during the early postpartum period had levels of 12 mg/L at 0.5 hour before a dose and 28 mg/L at 2 hours after a dose.[ 1 ] These data indicate that an exclusively breastfed infant would receive between 9 and 21% of the maternal weight-adjusted dosage. Infant Levels. Relevant published information was not found as of the revision date.
“No published information” means the studies do not exist yet — not that Tocainide is known to be harmful, and not that it is known to be safe. Your prescriber or pharmacist can weigh your baby's age and whether a better-studied alternative would do the same job. Worth asking before stopping a medicine you need.
Source: NIH LactMed (National Library of Medicine).
Educational summary of an authoritative source — not medical advice. Never start, stop, or change a medicine while breastfeeding without confirming with your doctor.