Comparative Pharmacology
Head-to-head clinical analysis: CYTOXAN versus URACIL MUSTARD.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CYTOXAN versus URACIL MUSTARD.
CYTOXAN vs URACIL MUSTARD
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 activation by cytochrome P450 enzymes to form active metabolites, primarily phosphoramide mustard.
Uracil mustard is a nitrogen mustard alkylating agent that crosslinks DNA, inhibiting DNA replication and transcription, leading to cell death.
500-1500 mg/m² IV every 2-4 weeks or 1-5 mg/kg/day PO for 10-14 days.
1 mg orally daily for 3 weeks, then 1 mg daily every 4 weeks, or 0.15 mg/kg orally once weekly.
None Documented
None Documented
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.
Clinical Note
moderateUracil mustard + Digoxin
"Uracil mustard may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateUracil mustard + Digitoxin
"Uracil mustard may decrease the cardiotoxic activities of Digitoxin."
Clinical Note
moderateUracil mustard + Deslanoside
"Uracil mustard may decrease the cardiotoxic activities of Deslanoside."
Clinical Note
moderateUracil mustard + Acetyldigitoxin
"Uracil mustard may decrease the cardiotoxic activities of Acetyldigitoxin."
Terminal half-life approximately 6–8 hours in patients with normal renal function; may be prolonged with renal impairment
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%).
Primarily renal (56-80% as unchanged drug and metabolites); minor fecal (10%)
Category C
Category C
Alkylating Agent
Alkylating Agent