Comparative Pharmacology
Head-to-head clinical analysis: BUSULFAN versus URACIL MUSTARD.
Peer-Reviewed Evidence
Head-to-head clinical analysis: BUSULFAN versus URACIL MUSTARD.
BUSULFAN vs URACIL MUSTARD
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Busulfan is a bifunctional alkylating agent that crosslinks DNA, primarily at guanine N7 positions, leading to DNA strand breaks and inhibition of DNA replication and transcription. It is cell cycle phase-nonspecific.
Uracil mustard is a nitrogen mustard alkylating agent that crosslinks DNA, inhibiting DNA replication and transcription, leading to cell death.
1-4 mg/day orally for remission induction in CML; 0.8-1 mg/kg every 6 hours orally for 4 days as part of myeloablative conditioning with cyclophosphamide.
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 is 2.5 to 4 hours (mean ~2.6 hours) after oral administration; prolonged to 3-5 hours with high-dose regimens. Half-life may increase with hepatic impairment.
Clinical Note
moderateBusulfan + Digoxin
"Busulfan may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateUracil mustard + Digoxin
"Uracil mustard may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateBusulfan + Digitoxin
"Busulfan may decrease the cardiotoxic activities of Digitoxin."
Clinical Note
moderateUracil mustard + Digitoxin
"Uracil mustard may decrease the cardiotoxic activities of Digitoxin."
Terminal half-life approximately 6–8 hours in patients with normal renal function; may be prolonged with renal impairment
Renal (10-50% unchanged), hepatic metabolism (primarily via glutathione S-transferases) with metabolites excreted in bile and urine. Fecal excretion minimal (<5%).
Primarily renal (56-80% as unchanged drug and metabolites); minor fecal (10%)
Category C
Category C
Alkylating Agent
Alkylating Agent