Heart Home > Tikosyn and Breastfeeding

It is not clear whether Tikosyn (dofetilide) would pass through breast milk in women or if it would harm a nursing infant. However, many experts believe that the drug can pass through breast milk to some extent. Due to the unknown risks, the manufacturer recommends that women not breastfeed while taking Tikosyn.

Can Breastfeeding Women Take Tikosyn?

Tikosyn® (dofetilide) is a prescription medication used in the treatment of certain heart rhythm problems (arrhythmias). It is used to help the heart start beating more regularly.
At this time, it is unknown whether Tikosyn passes through breast milk. The manufacturer recommends that women not breastfeed while taking Tikosyn. Therefore, if you are breastfeeding or plan to start, you should talk with your healthcare provider before taking this medication.

More Information on Tikosyn and Breastfeeding

Tikosyn has not been studied in breastfeeding women or animals. Therefore, it is unknown whether the medicine would pass through breast milk or harm a nursing child. Although this lack of information is certainly frustrating, it is important to understand that studies of medications are rarely done in breastfeeding women, as this could expose an infant, who will not directly benefit from the medication, to possible risks.
Based on the properties of Tikosyn, experts believe it can pass through breast milk to some extent. Until more information is known, it is probably best for women to avoid breastfeeding during Tikosyn treatment.

Talking With Your Healthcare Provider

You should discuss breastfeeding and Tikosyn use with your healthcare provider. Each woman's situation is different, and you and your healthcare provider understand your situation best. After considering what you want and expect, as well as your current health situation, the two of you can make a shared decision that is right for you.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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