Drug General Information (ID: DDISQM7J0R)
  Drug Name Morphine Drug Info Rifabutin Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Analgesics Antibiotics
  Structure

 Mechanism of Morphine-Rifabutin Interaction (Severity Level: Moderate)
     Increased metabolism (Unspecific) Click to Show/Hide Mechanism Graph
      Drug Name Morphine Rifabutin
      Mechanism Morphine Induction of morphine metabolism or elimination
      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
  • Increased metabolism of Morphine caused by Rifabutin 

Recommended Action
      Management The dosage of morphine may need to be readjusted depending on changes in the patient's clinical response to pain and/or narcotic side effects, if rifampin or rifabutin is added to or removed from a patient's therapy.

References
1 Fromm MF, Eckhardt K, Li SX, Schanzle G, Hofmann U, Mikus G, Eichelbaum M "Loss of analgesic effect of morphine due to coadministration of rifampin." Pain 72 (1997): 261-7. [PMID: 9272811]