Comparative Pharmacology
Head-to-head clinical analysis: CYCLOPHOSPHAMIDE versus CYTOXAN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CYCLOPHOSPHAMIDE versus CYTOXAN.
CYCLOPHOSPHAMIDE vs CYTOXAN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Cyclophosphamide is an alkylating agent that crosslinks DNA, leading to cell cycle nonspecific cytotoxicity. It requires hepatic metabolism by cytochrome P450 (CYP2B6, CYP3A4, CYP2C9) to form active metabolites, phosphoramide mustard and acrolein, which alkylate DNA and inhibit protein synthesis.
Cyclophosphamide is an alkylating agent that crosslinks DNA, leading to cell cycle nonspecific cytotoxicity. It requires hepatic activation by cytochrome P450 enzymes to form active metabolites, primarily phosphoramide mustard.
400-600 mg/m2 IV every 2-4 weeks; or 50-100 mg/m2 orally daily for 7-14 days; or 1-2 g/m2 IV as a single dose every 3-4 weeks.
500-1500 mg/m² IV every 2-4 weeks or 1-5 mg/kg/day PO for 10-14 days.
None Documented
None Documented
Clinical Note
moderateCyclophosphamide + Verteporfin
"Cyclophosphamide may increase the cardiotoxic activities of Verteporfin."
Clinical Note
moderateCyclophosphamide + Digoxin
"Cyclophosphamide may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateCyclophosphamide + Digitoxin
"Cyclophosphamide may decrease the cardiotoxic activities of Digitoxin."
Clinical Note
moderateCyclophosphamide + Deslanoside
Terminal elimination half-life: 4-8 hours in adults with normal renal function; prolonged in renal impairment (up to 15 hours) and in children.
Terminal elimination half-life of cyclophosphamide is 3-12 hours (range 2-19 h) in adults; the half-life of active metabolites (e.g., 4-hydroxycyclophosphamide) is approximately 8-10 hours. Half-life is prolonged in hepatic impairment (up to 20 h) and reduced in dose adjustments.
Renal: approximately 30-60% of dose excreted unchanged in urine; biliary/fecal excretion is minimal (<5%).
Renal elimination of unchanged cyclophosphamide (5-30%) and metabolites (primarily 4-ketocyclophosphamide and carboxyphosphamide) accounts for approximately 80% of total clearance; fecal excretion is minimal (<5%).
Category D/X
Category C
Alkylating Agent
Alkylating Agent
"Cyclophosphamide may decrease the cardiotoxic activities of Deslanoside."