Increased rates of overdose (OD) and blood-borne infections have been associated with injection drug use (IDU). This increasing overlap between IDU-related infectious diseases (ID) is a byproduct of the opioid OD crisis, especially with the transition to synthetic opioids with faster onset and shorter duration leading to potentially more frequent injections. ID specialists are uniquely positioned to positively impact the opioid OD crisis by capitalizing on opportunistic moments of engagement during clinical encounters with people who inject drugs (PWID). Harm reduction services should therefore be expanded and offered to PWID in ID settings to reduce rates of OD, infection, and hospitalization. Major target areas include: (1) safer injection practices teaching and distribution of materials such as sterile injection supplies, fentanyl test strips, and naloxone; (2) increased screening and access to pre-exposure prophylaxis and post-exposure prophylaxis; and (3) initiation of medications for opioid use disorder. Incorporating these strategies in various treatment settings can expand treatment access, improve patient outcomes, and reduce stigma associated with IDU.