Someone who uses drugs can be referred to in different ways depending on the context, the nature of the drug use, and the tone of the conversation. Here are some common terms:

1. Drug user: A neutral term that simply describes someone who uses drugs.
2. Substance user: A broader term that can refer to the use of any substance, including drugs and alcohol.
3. Addict or Drug addict: Often used to describe someone who is dependent on or addicted to drugs. However, this term can carry a negative or stigmatizing connotation.
4. Person with Substance Use Disorder: A more medical and non-stigmatizing term that emphasizes the condition as a disorder, often used in professional and healthcare settings.
5. Recreational drug user: Refers to someone who uses drugs occasionally and not necessarily in a harmful or addictive way.
6. Drug abuser: Implies harmful or excessive drug use, but like "addict," it can carry a negative tone.
7. Patient: Used in a clinical or therapeutic setting, especially when someone is receiving treatment for drug use.

Respectful Language

It's generally recommended to use terms like "person with a substance use disorder" in order to avoid stigma and emphasize that drug use is a health issue rather than a moral failing.