<p>An oral dose of 20mg reaches a C<sub>max</sub> of 40ng/mL with a T<sub>max</sub> of 5 hours.<sup class="text-reference-group"><a class="reference-popover-link" data-content="FDA Approved Drug Products: Tamoxifen Oral Tablets" href="#reference-L7799">15</a>,<a class="reference-popover-link" data-content="FDA Approved Drug Products: Tamoxifen Oral Solution" href="#reference-L7802">16</a></sup> The metabolite N-desmethyltamoxifen reaches a C<sub>max</sub> of 15ng/mL.<sup class="text-reference-group"><a class="reference-popover-link" data-content="FDA Approved Drug Products: Tamoxifen Oral Tablets" href="#reference-L7799">15</a>,<a class="reference-popover-link" data-content="FDA Approved Drug Products: Tamoxifen Oral Solution" href="#reference-L7802">16</a></sup> 10mg of tamoxifen orally twice daily for 3 months results in a C<sub>ss</sub> of 120ng/mL and a C<sub>ss</sub> of 336ng/mL.<sup class="text-reference-group"><a class="reference-popover-link" data-content="FDA Approved Drug Products: Tamoxifen Oral Tablets" href="#reference-L7799">15</a>,<a class="reference-popover-link" data-content="FDA Approved Drug Products: Tamoxifen Oral Solution" href="#reference-L7802">16</a></sup></p>