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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
A model to detect interactions between roxithromycin and oral contraceptives
Clinical Pharmacology and Therapeutics, Volume 47, No. 6, Year 1990
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Description
Twenty-two healthy women participated in a study to determine whether roxithromycin (a new macrolide antibiotic agent) obtunds the activity of a triphasic oral contraceptive. The duration of the study was four menstrual cycles. Medication was given as follows: (1) cycle 1, no medication to demonstrate ovulation; (2) cycle 2, triphasic oral contraceptive daily to suppress ovulation; (3) cycle 3, triphasic oral contraceptive daily plus roxithromycin, 150 mg b.i.d.; and (4) cycle 4, triphasic oral contraceptive daily plus rifampin, 300 mg daily. Sonography of the ovaries was performed on day 13, and serum progesterone was measured on day 21 of each cycle. Elevated progesterone indicated ovulation. The presence of a maturing follicle supported this finding. All volunteers ovulated in the first cycle and no volunteers ovulated in the second and third cycles. However, 11 women ovulated when rifampin and the triphasic oral contraceptive were given concomitantly. The findings suggest there is no reason to believe that roxithromycin interferes with the efficacy of oral contraceptives. © 1990.
Authors & Co-Authors
Meyer, Bernhardt H.
South Africa, Bloemfontein
University of the Free State
Müller, Frank Otto
South Africa, Bloemfontein
University of the Free State
Wessels, Paul H.
South Africa, Bloemfontein
University of the Free State
Maree, Johanna
South Africa, Bloemfontein
University of the Free State
Statistics
Citations: 36
Authors: 4
Affiliations: 1
Identifiers
Doi:
10.1038/clpt.1990.92
ISSN:
00099236
e-ISSN:
15326535
Research Areas
Health System And Policy
Sexual And Reproductive Health
Participants Gender
Female