Drug General Information (ID: DDIWZLM7AG)
  Drug Name Metformin Drug Info Amiloride Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antidiabetic Agents Diuretics
  Structure

 Mechanism of Metformin-Amiloride Interaction (Severity Level: Moderate)
     Decreased renal excretion (Unspecific) Click to Show/Hide Mechanism Graph
      Drug Name Metformin Amiloride
      Mechanism Metformin Decrease the excretion of metformin
      Key Mechanism Factor 1
Factor Name Pharmacokinetics
Factor Description Alters the excretion of the drug, resulting in changes in the plasma concentration of the drug and affecting the pharmacological effects.
      Mechanism Description
  • Decreased renal excretion of Metformin caused by Amiloride 

Recommended Action
      Management Particularly slow and cautious titration of metformin dosage is recommended if these drugs must be used together. The maximal dose of metformin should also be reduced until further information about this interaction is available. Patients should be advised to monitor their blood glucose and to promptly notify their physician if they experience possible signs of lactic acidosis such as malaise, myalgia, respiratory distress, hyperventilation, slow or irregular heartbeat, somnolence, abdominal upset, or other unusual symptoms.

References
1 Product Information. Glucophage (metformin). Bristol-Myers Squibb, Princeton, NJ.
2 Somogyi A, Stockley C, Keal J, Rolan P, Bochner F "Reduction of metformin renal tubular secretion by cimetidine in man." Br J Clin Pharmacol 23 (1987): 545-51. [PMID: 3593625]