<p><strong>Pregnancy</strong>&nbsp;Category C. There are no adequate and well-controlled studies in pregnant women. Tetrabenazine should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.<br />
<br />
<strong>Nursing Mothers</strong>: It is not known whether Tetrabenazine or its metabolites are excreted in human milk. Since many drugs are excreted into human milk and because of the potential for serious adverse reactions in nursing infants from Tetrabenazine, a decision should be made whether to discontinue nursing or to discontinue Tetrabenazine, taking into account the importance of the drug to the mother.</p>