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The Interventions domains in SDTM capture general observational class of domains is used  to represent investigational, therapeutic, and other treatments that are administered to the subject (with some actual or expected physiological effect) either as specified by the study protocol (e.g., exposure to study product  coincident with the study assessment period (e.g., concomitant medications), or self‑administered by the subject (e.g., use of alcohol, tobacco, or caffeine).

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Other domains have been established to record other types of interventions. Interventions administered to the subject coincident with the study assessment period are referred to as concomitant medications and represented in the SDTM Concomitant/Prior Medications (CM) domain and interventions administered as protocol-specified study products are represented in the Exposure (EX) and Exposure as Collected (EC) domains.

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Several examples are provided below to illustrate the different ways the subjects's history of recreational product usage may be collected in studies. Note, that the Findings About Events or Interventions structure (or "FA structure") is used to represent collected data that are findings about” an event or intervention that cannot be represented within an event or intervention record or as a supplemental qualifier to such a record. Not all findings associated with an event or intervention should be represented in the FA structure.

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