I am an intravenous drug user, am I more susceptible to getting endocarditis?

Definitely. Iv drug users are much more likely to get endocarditis, a life-threatening infection of heart valves that is difficult to treat. Skin bacteria enter the bloodstream during injection and attach to the valves, especially on the right side of the heart where blood enters from the body. The staph on the skin are particularly dangerous endocarditis organisms to which IV users are susceptible.