{description: 'The act of introducing or otherwise applying a substance to the subject.\r\n\r\n*Discussion:* The effect of the substance is typically established on a biochemical basis, however, that is not a requirement. For example, radiotherapy can largely be described in the same way, especially if it is a systemic therapy such as radio-iodine. This class also includes the application of chemical treatments to an area.\r\n\r\n*Examples:* Chemotherapy protocol; Drug prescription; Vaccination record', package_name: hl7.terminology, name: ActClassSubstanceAdministration, type: null, package_version: 2.1.0, class: unknown, kind: null, url: 'http://terminology.hl7.org/ValueSet/v3-ActClassSubstanceAdministration', version: 2.0.0}