define concomitant medication
Concomitant Medications NCI CRF Standards: Round 3. Concomitant medication is combining two or more treatment regimes when treating diseases. The Concomitant Medications module was one of the group of variables included in the third round of the CRF Harmonization and Standardization Initiative. The Concomitant Medications module includes harmonized variables related to Concomitant Medications recommended for collection on all NCI sponsored clinical trials.