The aim of the study was to consolidate evidence on barriers and facilitators to PrEP adherence among men who have sex with men. PubMed, Science Direct, and EBSCO host were utilized to search for relevant articles. Six articles from PubMed, published between 2010 and 2018, were reviewed. Thematic analysis was employed to synthesize findings. At the individual level, HIV susceptibility, knowledge of PrEP, and individual lifestyle affected PrEP adherence. At the organizational level, cost of PrEP and quality of PrEP services influenced adherence to PrEP. At the societal level, social stigma, financial assistance or medical insurance, and family and peer support were determinants of PrEP adherence. Facilitators included perceived high risk of HIV infection and payment assistance, while barriers included social stigma and high cost of PrEP. Social stigma and structural level factors such as payment assistance and cost of PrEP need to be examined to ensure optimal adherence to PrEP.