Clinical Trials


Effects of BufferGel and PRO 2000/5 Gel in Men

This study has been completed
National Institute of Allergy and Infectious Diseases (NIAID)

Information provided by (Responsible Party)
National Institute of Allergy and Infectious Diseases (NIAID) Identifier

First received: May 16, 2001
Last updated: April 3, 2012
Last Verified: April 2012
History of Changes


The purpose of this study is to find out if there are any bad effects when BufferGel or PRO 2000/5 Gel are applied to the penis of HIV-infected men.

Microbicides are products to be used by women for placing into the vagina to prevent passing HIV from 1 person to another during sex. Studies have shown 2 investigational microbicides, BufferGel and PRO 2000/5 Gel, to be safe and acceptable for women and HIV-negative men. It is important to see if the side effects of these products are the same in men as those in women and to see if there is any difference in the side effects between circumcised and uncircumcised men.

Condition Intervention Phase
HIV Infections

Drug : Naphthalene 2-sulfonate polymer
Drug : Carbopol polymer
Phase 1

Study Type: Interventional
Study Design: Intervention Model: Crossover Assignment
Primary Purpose: Prevention
Official Title: Male Tolerance Study of BufferGel and PRO 2000/5 Gel (P)

Further study details as provided by National Institute of Allergy and Infectious Diseases (NIAID):

Enrollment: 24
Study Completion Date: May 1997

Detailed Description:

Topical microbicides are products designed to prevent the sexual transmission of HIV and other disease pathogens. Studies have shown that nonoxynol-9, a detergent microbicide, can cause mucosal erosion and ulceration and increased risk of HIV infection. Attention has been given to developing non-detergent topical microbicides, such as BufferGel and PRO 2000/5 Gel. Studies have shown these products to be safe and acceptable for vaginal use [AS PER AMENDMENT 08/20/01: "however, none of the clinical studies to date have investigated the effects on the penile epithelium and urethral mucosa" has been replaced with: Phase I trials also have been conducted to assess the safety of BufferGel and PRO 2000/5 Gel (P) on the penile epithelium and urethral mucosa. In 1 trial, HIV-uninfected men applied either PRO 2000/5 or a gel containing the inactive ingredients of PRO 2000/5 for 7 days. A few patients reported mild symptoms of genital itching, tingling, irritation, dryness, discoloration, or flaking of the dried gel. In a similar trial comparing BufferGel and K-Y Jelly, a few patients reported similar symptoms.] It is important to determine whether the frequency and severity of adverse events experienced by men is comparable to that observed among women. It is also important to determine whether these adverse events are similar between circumcised and uncircumcised men.
Patients are assigned randomly to 1 of 6 possible sequences of product use. Patients complete 3 weeks of nightly product application (7 consecutive nights each of BufferGel, PRO 2000/5 Gel, and placebo gel) separated by a one-week washout between product-use periods. Patients apply the gel to the shaft and glans of the penis at bedtime, leave on for a minimum of 6 hours, and wash off the next morning. Patients maintain a diary of product application and removal, side effects, and use of other medications. Follow-up evaluations, including a genital exam and urine testing, are performed after each product-use and washout period. [AS PER AMENDMENT 08/20/01: Digital photographs will be taken of any observed abnormality or normal area that is needed for clinical decision making and/or documentation purposes.] In addition, adherence is assessed, the patient diary is reviewed, and product acceptability questionnaires are administered after each product-use period. Patients receive monetary compensation for participation.



Ages Eligible for Study: 18 Years and older  
Sexes Eligible for Study: Male  
Accepts Healthy Volunteers: No  


Inclusion Criteria
Patients may be eligible for this study if they:

  • Are male and at least 18 years old.
  • Are HIV-positive.
  • Have a CD4 cell count over 200 within the year before study entry.
  • Can speak and write English.
  • Can provide address, phone number, or other contact information.
  • Agree not to apply other products to the penis during the 3 weeks of product use.
  • Agree not to have sex, masturbate, or perform other activities that may irritate the penis during the 3 weeks of product use.

  • Exclusion Criteria
    Patients will not be eligible for this study if they:
  • Are allergic to any ingredients in the study products.
  • Have had inflammation of the urethra (painful urination, burning, or itching) in the past.
  • Have had penis skin reactions, eczema, psoriasis, severe seborrheic dermatitis, or other similar problems in the past.
  • Have had a non-HIV sexually transmitted disease (STD), including a genital herpes outbreak, in the past 6 months.
  • Have had a change in anti-HIV drugs in the past 30 days.
  • Have taken part in any other study of an investigational product in the past 30 days.
  • Have broken skin on the penis.
  • Have signs or symptoms of an STD.
  • Apply topical products (e.g., creams or ointments) to the penis.
  • Have an abnormal finding on the physical or genital exam.
  • Have a positive result from a urine leukocyte esterase (LE) test.
  • Use any drugs that would affect the study, in the doctor's opinion.

contacts and locations

Contacts and Locations

Choosing to participate in a study is an important personal decision.Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00016536


United States, Washington
UW HIV Prevention CRS
Seattle, Washington, United States, 98104

Sponsors and Collaborators

National Institute of Allergy and Infectious Diseases (NIAID)


Study Chair: Connie Celum
More Information

More Information

Responsible Party: National Institute of Allergy and Infectious Diseases (NIAID) Identifier: NCT00016536   History of Changes  
Other Study ID Numbers: HPTN 032  
Study First Received: May 16, 2001  
Last Updated: April 3, 2012  

Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):

Antiviral Agents
Mucous Membrane
Spermatocidal Agents
PRO 2000
HIV Seronegativity

Additional relevant MeSH terms:
HIV Infections processed this data on July 19, 2018
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