# interventions Interventions represent any substances or procedures **administered to** a participant; through a clinical trial or the participant’s use of prescription or recreational drugs. Detailed variables are available to record exactly how much and when a drug is administered. This allows searching by dose amount, or other variable.

### JSON variables :blue\_circle: Primary key\ :red\_circle: Required

Variable	Type	Default	Description
`AdministrationRoute`	string		Drug entry route (oral, IV, unknown, etc).
`DateRecordCreate`	string		Date the record was created in the current database. The original record may have been imported from another database.
`DateRecordEntry`	string		Date the record was first entered into a database.
`DateRecordModify`	string		Date the record was modified in the current database.
`DateEnd`	datetime		Datetime the intervention was stopped.
`DateStart`	datetime	🔴	Datetime the intervention was started.
`Description`	string		Longer description.
`DoseString`	string	🔴	Full dosing string. Examples `tylenol 325mg twice daily by mouth`, or `5g marijuana inhaled by volcano`
`DoseAmount`	number		In combination with other dose variables, the quantity of the drug.
`DoseFrequency`	string		Description of the frequency of administration.
`DoseKey`	string		For clinical trials, the dose key.
`DoseUnit`	string		mg, g, ml, tablets, capsules, etc.
`InterventionClass`	string		Drug class.
`InterventionName`	string	🔴 🔵	Name of the intervention.
`Notes`	string		Notes about drug.
`Rater`	string		Rater/experimenter name.

### Recording drug administration The following examples convert between common language and the squirrel storage format > esomeprazole 20mg capsule by mouth daily | Variable | Value | | ------------- | ------------ | | DrugClass | PPI | | DrugName | esomeprazole | | DoseAmount | 20mg | | DoseFrequency | daily | | Route | oral | | DoseUnit | mg | > 2 puffs atrovent inhaler every 6 hours | Variable | Value | | ------------------- | -------------- | | DrugName | ipratropium | | DrugClass | bronchodilator | | DoseAmount | 2 | | DoseFrequency | every 6 hours | | AdministrationRoute | inhaled | | DoseUnit | puffs | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.neuroinfodb.org/nidb/contribute/squirrel-data-sharing-format/specification-v1.0/data/subjects/interventions.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.