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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Nonoxynol-9 100 mg gel: multi-site safety study from sub-Saharan Africa.

OBJECTIVES: To evaluate the safety of 100 mg nonoxynol-9 (N-9) gel, a vaginal microbicide, on the genital mucosa of women from Malawi and Zimbabwe in preparation for a phase III efficacy study. METHODS: HIV-uninfected women (180) were enrolled and randomized to either N-9 or placebo gel and instructed to insert gel into the vagina twice daily for 14 days. Follow up examinations were conducted at 7 and 14 days. RESULTS: The number of adverse events in the N-9 gel group was higher than in the placebo group (40% versus 13%; P < 0.01). Reported number of any genital symptoms was significantly higher in the N-9 group (38% N-9, 13% placebo; P = 0.01). The number of total epithelial disruptions was higher in the N-9 group (20% versus 3%; P < 0.01); however, the number of genital ulcers and abrasions in the N-9 group was low (2% and 3%, respectively) and not different from that in the placebo group (1% and 2%, respectively). CONCLUSIONS: N-9 gel 100 mg caused a significant increase in the rate of genital symptoms and epithelial disruptions compared with placebo. The clinical significance of these epithelial disruptions is unknown. Although these findings alone were not sufficient to cancel the planned phase III study, when considered together with the negative results from the COL-1492 effectiveness trial of 52.5 mg N-9 gel, the decision was made to cancel the planned phase III trial of 100 mg N-9 gel.[1]


  1. Nonoxynol-9 100 mg gel: multi-site safety study from sub-Saharan Africa. Hoffman, I.F., Taha, T.E., Padian, N.S., Kelly, C.W., Welch, J.D., Martinson, F.E., Kumwenda, N.I., Rosenberg, Z.F., Chilongozi, D.A., Brown, J.M., Chirenje, M., Richardson, B.A. AIDS (2004) [Pubmed]
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