A role used to assert the relationship between a biological process and a drug or chemical that stimulates the process. The role implies the direct physical interaction of a chemical or drug with a target molecule or complex that results in the initiation of the process. The domain and range for this role are 'Biological Process' and 'Drug, Food, Chemical or Biomedical Material', respectively.

Synonyms: Biological_Process_Has_Initiator_Chemical_Or_Drug