Table 2.

Risks associated with substance use and questions to ask as part of the addiction history

Substance Use—Associated Risks	Questions to Ask in the Addiction History
Injection drug use	• Have you ever injected drugs? If so, do you currently inject? Approximately how frequently?
	• Do you use clean injecting equipment? Have you ever previously shared injecting equipment?
Infectious diseases (eg, HIV and hepatitis)	• Have you previously been tested for HIV or hepatitis?
	• When was your last test and what was the result?
	• Do you ever exchange sex for drugs or money?
Overdose risk	• Do you use alone?
	• Have you previously overdosed? If so, approximately how many times? When was your last overdose?
	• Have you ever witnessed anyone else overdose?
	• Do you have a naloxone kit?
	• Do you ever take a test dose before using to assess your drug’s potency?
Harm reduction services	• Do you access needle exchange programs or supervised consumption sites?