substance use
polysubstance use
https://en.wikipedia.org/wiki/Poly_drug_use
https://www.wikidata.org/wiki/Q1639827
The use of combined psychoactive substances to achieve a particular effect. In many cases one drug is used as a base or primary drug, with additional drugs to leaven or compensate for the side effects of the primary drug and make the experience more enjoyable with drug synergy effects, or to supplement for primary drug when supply is low.
poly drug use
polysubstance abuse