<p><strong>Pregnancy</strong>&nbsp;category B. Valacyclovir was not teratogenic in rats or rabbits at 10 and 7 times human plasma levels, respectively, during the period of major organogenesis. There is no adequate and well-controlled studies of valacyclovir in pregnant women.<br />
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<strong>Nursing Mothers</strong>: Unchanged valacyclovir was not detected in maternal serum, breast milk, or infant urine. Valacyclovir should be administered to a nursing mother with caution and only when indicated.</p>