<p><strong>Pregnancy</strong>: Bisoprolol fumarate was not teratogenic in rats at doses up to 150 mg/kg/day, which is 375 times the maximum recommended human daily dose. Bisoprolol fumarate was fetotoxic (increased late resorptions) at 50 mg/kg/day and maternotoxic (decreased food intake and body-weight gain) at 150 mg/kg/day. Bisoprolol fumarate was not teratogenic in rabbits at doses up to 12.5 mg/kg/day, which is 31 times the maximum recommended human daily dose, but was embryolethal (increased early resorptions) at 12.5 mg/kg/day. There are no studies in pregnant women. Bisoprolol fumarate should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.<br />
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<strong>Lactation</strong>: Small amounts of bisoprolol fumarate (&lt;2% of the dose) have been detected in the milk of lactating rats. It is not known whether this drug is excreted in human milk. If use of bisoprolol fumarate is considered essential, then mothers should stop nursing.</p>