Background: Women may need or seek male partner approval to {Malow, 2000 #18}{Malow, 2000 #18}{Malow, 2000 #18}{Malow, 2000 #18}safely and consistently use oral antiretroviral pre-exposure prophylaxis (PrEP) or vaginal microbicides. We developed CHARISMA, a counseling intervention to support womenâs relationships and their ability to consistently use HIV prevention products.Methods: In a pilot study with 95 female participants in Johannesburg, South Africa, lay counselors assessed participantsâ relationship(s) with their male partner(s) and barriers or facilitators to HIV prevention method use, and then provided tailored, interactive counseling. We conducted study participant surveys and clinic staff interviews to evaluate CHARISMAâs feasibility and acceptability.Results: The CHARISMA pilot study indicates that a two-session relationship counseling intervention with 6-month follow-up to support womenâs ability to safely and effectively use vaginal microbicides was generally acceptable and feasible. Most participants thought CHARISMA was relevant, helpful, and about the right length, and that it had a positive impact on their relationships with their partners and their product use. Staff stated that it was generally feasible to implement. Based on these promising preliminary findings, the project team is currently conducting a randomized controlled trial in which participants are receive either the standard of care for IPV screening and referral (control arm) or the CHARISMA intervention.Conclusions: Clinic staff felt strongly that the length and intensity of CHARISMA were necessary for participants to begin to trust the counselors enough to be open and honest about problems in their relationships, and to begin to overcome the normalization of intimate partner violence. The length and intensity of CHARISMA may not be feasible in some settings, but a shorter version of the intervention may not offer as much support as women and staff need. One possible approach to reduce the burden on clinic staff would be to self-administer the intervention through a computer rather than requiring a counselor. Lessons learned from the pilot study may be relevant to others developing interventions supporting womenâs use of oral PrEP or vaginal microbicides.