Drug General Information (ID: DDIGZKF9OR)
  Drug Name Sulfasalazine Drug Info Phenobarbital Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antiinflammatory Agents Anticonvulsants
  Structure

 Mechanism of Sulfasalazine-Phenobarbital Interaction (Severity Level: Minor)
     Competitive inhibition of bile excretion Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Sulfasalazine Phenobarbital
      Mechanism Sulfasalazine Increase biliary excretion of sulfasalazine
      Key Mechanism Factor 1
Factor Name Biliary excretion
Factor Description Biliary excretion is an important way for the body to remove certain drugs and drug metabolites. Biliary excretion of drugs may be reduced when two drugs compete for it.
      Mechanism Description
  • Decreased elimination of Sulfasalazine caused by Phenobarbital mediated competitive inhibition of bile excretion

References
1 Schroder H, Lewkonia RM, Price Evans DA "Metabolism of salicylazosulfapyridine in healthy subjects and in patients with ulceratice colitis. Effects of colectomy and of phenobarbital." Clin Pharmacol Ther 14 (1973): 802-9