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Efavirenz, in contrast to nevirapine, is associated with unfavorable progesterone and antiretroviral levels when coadministered with combined oral contraceptives.
Landolt NK, Phanuphak N, Ubolyam S, Pinyakorn S, Kriengsinyot R, Ahluwalia J, Thongpaeng P, Gorowara M, Thammajaruk N, Chaithongwongwatthana S, Lange JM, Ananworanich J. Landolt NK, et al. Among authors: thongpaeng p. J Acquir Immune Defic Syndr. 2013 Apr 15;62(5):534-9. doi: 10.1097/QAI.0b013e31827e8f98. J Acquir Immune Defic Syndr. 2013. PMID: 23187949 Clinical Trial.
Significant decrease of ethinylestradiol with nevirapine, and of etonogestrel with efavirenz in HIV-positive women.
Landolt NK, Phanuphak N, Ubolyam S, Pinyakorn S, Kerr S, Ahluwalia J, Thongpaeng P, Thammajaruk N, Cremers S, Thomas T, Chaithongwongwatthana S, Lange JM, Ananworanich J. Landolt NK, et al. Among authors: thongpaeng p. J Acquir Immune Defic Syndr. 2014 Jun 1;66(2):e50-2. doi: 10.1097/QAI.0000000000000134. J Acquir Immune Defic Syndr. 2014. PMID: 24608892 No abstract available.