Comparative Pharmacology
Head-to-head clinical analysis: IFEX versus LOMUSTINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: IFEX versus LOMUSTINE.
IFEX vs LOMUSTINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
IFEX (ifosfamide) is an alkylating agent that crosslinks DNA strands, inhibiting DNA synthesis and transcription. It requires hepatic activation via CYP3A4 to form active metabolites (ifosfamide mustard and acrolein).
Alkylating agent that crosslinks DNA, inhibits DNA synthesis, and produces interstrand crosslinks via chloroethyl carbonium ion formation. Also has carbamoylating activity.
1.2 g/m2 intravenously daily for 5 consecutive days every 3 weeks, or 5 g/m2 as a 24-hour continuous infusion every 3 weeks.
130 mg/m² orally as a single dose every 6 weeks; subsequent doses adjusted based on hematologic response.
None Documented
None Documented
Clinical Note
moderateLomustine + Digoxin
"Lomustine may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateLomustine + Digitoxin
"Lomustine may decrease the cardiotoxic activities of Digitoxin."
Clinical Note
moderateLomustine + Deslanoside
"Lomustine may decrease the cardiotoxic activities of Deslanoside."
Clinical Note
moderateLomustine + Acetyldigitoxin
"Lomustine may decrease the cardiotoxic activities of Acetyldigitoxin."
Terminal elimination half-life is approximately 15 hours in adults with normal renal function; prolonged in renal impairment.
Biphasic: initial half-life ~6 hours; terminal half-life ~16-48 hours (mean 24 hours). Metabolites have prolonged half-life up to 72 hours. Clinical context: accumulation with repeated dosing, requiring 6-week intervals.
Renal: approximately 50-70% of the administered dose is excreted in urine as unchanged drug; biliary/fecal excretion is minimal, accounting for less than 5%.
Renal excretion approximately 50% (as metabolites), biliary/fecal excretion approximately 20%; remainder unaccounted, likely metabolized.
Category C
Category D/X
Alkylating Agent
Alkylating Agent