Drug General Information (ID: DDIVZTECSX)
  Drug Name Methotrexate Drug Info Azathioprine Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antimetabolites Immunosuppressive Agents
  Structure

 Mechanism of Methotrexate-Azathioprine Interaction (Severity Level: Minor)
     Decreased metabolism (Unspecific) Click to Show/Hide Mechanism Graph
      Drug Name Methotrexate Azathioprine
      Mechanism Inhibit the hepatic metabolism of thiopurines Thiopurines
      Key Mechanism Factor 1
Factor Name Pharmacokinetics
Factor Description Alters the metabolism of the drug, leading to changes in the plasma concentration of the drug and affecting the pharmacological effects.
      Mechanism Description
  • Decreased metabolism of Azathioprine caused by Methotrexate 

References
1 Balis FM, Holcenberg JS, Zimm S, et al "The effect of methotrexate on the bioavailability of oral 6-mercaptopurine." Clin Pharmacol Ther 41 (1987): 384-7. [PMID: 3470165]