Participants randomized to the on-site integrated care with adherence counselling arm will be prescribed pre-exposure prophylaxis (PrEP) (Truvada®) and, if indicated, Hepatitis C (HCV) treatment (Epclusa®) at the OAT clinic or SAP from which they were recruited. In addition to PrEP and, if indicated, HCV care, participants in the on-site integrated care arm will receive any required health care services as per local standard of care. Addiction treatment, OAT, and mental health services will be provided, if necessary and available. Participants recruited at syringe access programs (SAP) will be offered addiction counseling and treatment, including OAT when in the integrated care arm in addition to site standard of care.

Participants randomized to the off-site referral to specialized care and patient navigation group will be linked to primary care for PrEP and, if necessary, HCV treatment by a patient navigator. Given the replicated success of the AntiRetroviral Treatment Access Study (ARTAS) intervention regarding linking HIV-infected individuals to HIV primary care, we adapted ARTAS to facilitate people who inject drugs linkage with PrEP and, if necessary, HCV treatment services. Participants in the off-site care arm will be prescribed PrEP and, if necessary, HCV treatment by their off-site physician. All necessary care will also be provided to participants by their off-site physician. Off-site physicians will be notified that if their patients are placed on a waiting list, unable to afford, or are otherwise unable to immediately access PrEP or HCV treatment, Truvada® and Epclusa® are available to participants of the M2HepPrEP study immediately and free of charge.

Patient navigation will provided by trained patient navigators to participants randomized to the off-site referral to specialized care arm. Patient Navigators will actively coordinate and link participants to available clinics and community resources by scheduling appointments, arranging transportation, and assisting the participant with completing any paperwork that a clinic or service agent may require. The intervention will include up to five, 30-45 minute face-to-face meetings between the patient navigator and participant. These meetings will be tailored around each participant's needs. Additionally, the patient navigator assists the participant in identifying and utilizing informal and formal sources of support to move along the PrEP and/or HCV care continuum.The patient navigator will help the participant inform off-site physicians of the trial and of the availability of PrEP and HCV medication, should the physician and patient decide to initiate one or both treatments.

Average proportion of Dried Blood Spots (DBS) with detectable levels of Tenofovir at 6 months

HCV cure among the HCV positive strata will be compared between both treatment arms at 12 months post randomization. HCV cure is defined as initiating HCV treatment within six (6) months of being randomized and achieving sustained viral response 12 weeks (SVR-12) post-treatment completion. HCV treatment initiation will be measured using self-report and by assessing medical/drug dispensation records. SVR-12 will be measured by testing HCV-RNA negative 12 weeks after end of HCV treatment. If a participant initiates treatment within six (6) months of randomization but does not achieve SVR-12, they will not be counted as a success. Likewise, if a participant who is randomized as HCV positive achieves SVR-12 but did not initiate treatment within 6-months of randomization, they will not be counted as a success.

Proportion of participants who self-report PrEP use and achieve detectable levels of tenofovir as measured by DBS testing at 6 months and 12 months post randomization.