Women and AIDS Research Initiative Amendments of 1991 - Amends the Public Health Service Act to direct the Secretary of Health and Human Services, through the Director of the National Institutes of Health (NIH), the Administrator of the Alcohol, Drug Abuse, and Mental Health Administration, or both, to establish a program to conduct biomedical and behavioral research on cases of infection with the etiologic agent for acquired immune deficiency syndrome (AIDS) in women. Authorizes the Secretary to conduct the research directly or through grants. Specifies forms of research to be included. Authorizes appropriations.

Authorizes appropriations for grants for community-based clinical trials on experimental treatments for such infection for women. Allows the Director of the NIH to authorize grantees to expend the grants to provide individuals with such transportation, child care, and other incidental services as may be necessary to enable the individuals to participate as subjects in the trials.