Prism Health North Texas will be one of the largest US sites for IMPOWER 22, a study for a new form of PrEP medication designed for women and transgender men. In collaboration with Merck and the Bill & Melinda Gates Foundation, the study will have large numbers of participants in sub-Saharan Africa, where women and girls are at extremely high risk of contracting HIV. 

While there are currently two PrEP drugs on the market (Truvada and Descovy), Descovy has not been studied in large-scale clinical trials in women or transgender men, limiting them to one option for a pre-exposure prophylaxis treatment. The medication, islatravir, is a once-monthly oral tablet. Through funding provided by the Bill & Melinda Gates Foundation, this study will focus on women and adolescent girls at high risk for acquiring HIV. The study was designed with the goal of ending the global HIV epidemic in mind. The women of sub-Saharan Africa specifically are an important target for new and improved drugs for PrEP as more than half of new HIV diagnoses in the world originate in this region. While the study will have a significant percentage of participants who are women in sub-Saharan Africa, Dallas-based PHNTX will be one of the largest sites testing participants in the United States.  

“PHNTX serves a large population of women who are either living with HIV or are at risk for acquiring HIV,” said Katie Mulosia, LMSW and senior clinical research study coordinator at PHNTX. “Our research unit has been very involved with the studies that have led to the approval of current options for HIV prevention, but many of these options have focused on prevention efforts in men.”

Prism Health North Texas hopes to empower North Texas women to make decisions regarding their health, contribute to scientific discovery, and to help end the HIV epidemic through participation in the study.

So, who can participate? 

Cisgender women aged 18-45 who do not have HIV, have been sexually active with at least one male partner in the past 30 days, are not in a mutually monogamous relationship with a recently tested HIV-negative partner, and meet at least one of the following criteria are candidates for this study:

  • Infrequent use of condoms during sex with one or more partners of unknown HIV status who are bisexual men or men who use intraveneous drugs.

  • In an ongoing sexual relationship with an HIV-positive partner.

  • Diagnosed with syphilis, gonorrhea, or chlamydia in the past six months. 

Participants will be compensated for their time and all study medication and study-related tests will be provided at no cost.  Learn more at

PHNTX encourages Dallas-area women to volunteer for the study as part of efforts to study new treatments to end the HIV epidemic by expanding preventative treatment for women. Through participating, women are empowered to make decisions regarding their health, to contribute to scientific discovery, and to see if they qualify for clinical studies investigating the prevention of HIV. 

“Many of our clients and members of the community have asked us, ‘when will you do a PrEP study that focuses on women?’,” Mulosla added. “My colleagues and I are excited that we now can offer them an opportunity to participate in this clinical trial.”





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