Davis's Drug Guide
Tri–Legest–21
Phase I
norethindrone 1 mg + ethinyl estradiol 20 mcg
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Citation
Vallerand, April Hazard., and Cynthia A. Sanoski. "Tri–Legest–21." Davis's Drug Guide, 20th ed., F.A. Davis Company, 2026. Emergency Central, emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109996/all/Tri–Legest–21.
Vallerand AHA, Sanoski CAC. Tri–Legest–21. Davis's Drug Guide. F.A. Davis Company; 2026. https://emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109996/all/Tri–Legest–21. Accessed July 21, 2026.
Vallerand, A. H., & Sanoski, C. A. (2026). Tri–Legest–21. In Davis's Drug Guide (20th ed.). F.A. Davis Company. https://emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109996/all/Tri–Legest–21
Vallerand AHA, Sanoski CAC. Tri–Legest–21 [Internet]. In: Davis's Drug Guide. F.A. Davis Company; 2026. [cited 2026 July 21]. Available from: https://emergency.unboundmedicine.com/emergency/view/Davis-Drug-Guide/109996/all/Tri–Legest–21.
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