Comparative Pharmacology
Head-to-head clinical analysis: AZASAN versus CYCLOSPORINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AZASAN versus CYCLOSPORINE.
AZASAN vs CYCLOSPORINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Azathioprine is a purine analog that inhibits purine synthesis, thereby interfering with DNA and RNA synthesis. It is metabolized to 6-mercaptopurine, which inhibits T-cell activation and proliferation, leading to immunosuppression.
Cyclosporine is a calcineurin inhibitor that binds to cyclophilin, forming a complex that inhibits calcineurin, thereby preventing dephosphorylation and nuclear translocation of nuclear factor of activated T-cells (NFAT), which reduces transcription of interleukin-2 and other cytokines, leading to immunosuppression.
1-3 mg/kg/day orally once daily or divided twice daily; maximum dose 2.5 mg/kg/day for rheumatoid arthritis; usual dose 50-150 mg/day.
Initial oral dose: 3-5 mg/kg/day divided q12h; maintenance: 2-4 mg/kg/day divided q12h. IV dose: 3-5 mg/kg/day as continuous infusion or divided q8-12h.
None Documented
None Documented
Clinical Note
moderateCyclosporine + Norfloxacin
"The metabolism of Norfloxacin can be decreased when combined with Cyclosporine."
Clinical Note
moderateCyclosporine + Torasemide
"The risk or severity of adverse effects can be increased when Cyclosporine is combined with Torasemide."
Clinical Note
moderateCyclosporine + Etacrynic acid
"The risk or severity of adverse effects can be increased when Cyclosporine is combined with Etacrynic acid."
Clinical Note
moderateCyclosporine + Furosemide
Terminal elimination half-life of azathioprine is approximately 4.5 hours (range 2–6 h), while its active metabolite 6-mercaptopurine has a half-life of 0.5–2 hours. Clinical context: Renal impairment prolongs half-life.
Terminal elimination half-life ranges from 8.4 to 27 hours (mean ~19 hours) in adults with normal liver function. In patients with hepatic impairment, half-life may be prolonged. Pediatric patients typically have shorter half-lives (7–19 hours).
Renal: 88% as 6-mercaptopurine and metabolites; biliary: <10%
Primarily hepatic metabolism via CYP3A4; eliminated in bile and feces. Renal excretion accounts for <6% of unchanged drug. Approximately 90% of metabolites are excreted in bile and feces.
Category C
Category D/X
Immunosuppressant
Immunosuppressant
"The risk or severity of adverse effects can be increased when Cyclosporine is combined with Furosemide."