Concomitant Agent

**Semantic type:** Conceptual Entity

**Definition:** A pharmaceutical agent other than agent(s) tested in a given protocol that is administered to or used by a subject either prior to or during the study. Supportive care and essential ancillary medications required by a treatment regimen should be clearly identified. A protocol's complete instructions including appropriate indication, dosage, administration route, schedule, restrictions to use, and any other relevant data should be explicitly stated. Concept also refers to substance(s) used prior or during the study that are not specified by the protocol.

**Synonyms:** - CMTRT - CMTRT - Concomitant Medication Reported Name - Concomitant Medication or Therapy - ConcomitantAgent - MEDICATION - MEDICATION - MEDICATION - concomitant medications