CClinicalTrials.gg
CompletedNCT00000926Updated Oct 29, 2021

A Study of Nonoxynol-9 (N-9) and HIV Infection

A Phase 3 interventional study of Nonoxynol-9 in HIV Infections, sponsored by National Institute of Allergy and Infectious Diseases (NIAID). Completed at 1 site in United States. Open to female participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-10-29.

Sponsored by National Institute of Allergy and Infectious Diseases (NIAID) · Phase 3, Interventional, and Prevention

Phase
Phase 3
Study type
Interventional
Enrollment
4,400
Ages
18 Years and older
Sex
Female
01

Study summary

The purpose of this study is to see if nonoxynol-9 (N-9) gel used in the vagina can prevent the spread of HIV.

Most of the people with HIV in the world today live in southern Africa. Because this population is not likely to use condoms, an HIV-prevention method that women can control is needed. N-9 used in the vagina may help prevent the spread of HIV and other sexually transmitted diseases.

Read the detailed description

Intravaginal application of N-9 may help protect women from HIV and other STD infection. Low rates of condom use in sub-Saharan African populations, which constitute the majority of HIV infections, dictate the need for prophylactic methods women can control.

This trial will be conducted in Zimbabwe and Malawi. The Phase III trial is preceded by a 2-week safety and acceptability pilot study to determine the extent of genital irritation caused by N-9 and the placebo. Following the pilot study and prior to screening for enrollment in the Phase III trial, potential volunteers will participate in a 2-month behavioral counseling program that will encourage the use of condoms. Only participants who decide they cannot or will not be consistent condom users are enrolled in the main study. Study participants are given N-9 gel or placebo to use each time they have vaginal sexual intercourse for 18 to 36 months. Participants have a follow-up evaluation once a month; a pelvic exam and blood tests are performed every third month.

02

Conditions studied

03

In context

Infections

6,686 studies on the registry are indexed under Infections; 807 are open to participants now.

This study's enrollment of 4,400 is above the median of 120 across 4,199 interventional studies indexed under Infections.

Browse Infections studies →

Lead sponsor

National Institute of Allergy and Infectious Diseases (NIAID) is the lead sponsor of 2,401 studies on the registry; 179 are open to participants now.

Of its 396 completed or terminated interventional studies of FDA-regulated products, 294 (74%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
Yes

Inclusion criteria

Volunteers may be eligible if they:

  • Are HIV-negative.
  • Are sexually active and expect to have vaginal intercourse at least twice a week during the study.
  • Are willing to keep a diary of their sexual behavior and N-9 use.
  • Are willing to have regular clinic visits including pelvic exams.
  • Are at least 18 years old.
  • Are female.

Exclusion criteria

Exclusion Criteria

Volunteers will not be eligible if they:

  • Have had a child or an abortion in the past 42 days.
  • Are allergic to latex or N-9.
  • Have genital sores.
  • Have syphilis, chlamydia, gonorrhea, or trichomoniasis.
  • Are enrolled in another study for a product like N-9.
  • Expect to use another vaginal product other than N-9 during the study.
  • Are pregnant.
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Study design

Phase
Phase 3
Primary purpose
Prevention
Masking
Double
Enrollment
4,400 participants

Interventions

  • DrugNonoxynol-9
06

Study locations

1 site
  • Julia Welch
    Research Triangle Park, North Carolina 27709, United States
07

References and documents

Publications

  • Kumwenda N, Hoffman I, Chirenje M, Kelly C, Coletti A, Ristow A, Martinson F, Brown J, Chilongozi D, Richardson B, Rosenberg Z, Padian N, Taha T. HIV incidence among women of reproductive age in Malawi and Zimbabwe. Sex Transm Dis. 2006 Nov;33(11):646-51. doi: 10.1097/01.olq.0000223283.27142.9f. PubMed 16773032 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 29, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00000926
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
Responsible party
Sponsor
First posted
Aug 31, 2001
Completion
Feb 2001
Last update
Oct 29, 2021

Study contacts

Taha E.Taha
study chair
Nancy Padian
study chair
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2021. You cannot join it, but the record below documents what was studied.

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