Comparative Pharmacology
Head-to-head clinical analysis: DEXACORT versus FLAC.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DEXACORT versus FLAC.
DEXACORT vs FLAC
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Dexamethasone is a glucocorticoid receptor agonist that modulates gene expression to produce anti-inflammatory and immunosuppressive effects by inhibiting phospholipase A2, reducing prostaglandin and leukotriene synthesis, and suppressing cytokine production.
FLAC (Fluorouracil) is a pyrimidine analog that inhibits thymidylate synthase, blocking DNA synthesis. It is converted to active metabolites (FdUMP, FUTP) that disrupt RNA function and DNA replication.
Oral: 0.75-9 mg/day in divided doses; IV: 0.5-9 mg/day every 6-12 hours; IM: 4-20 mg every 2 weeks.
Adults: 40 mg orally twice daily.
None Documented
None Documented
Plasma terminal elimination half-life is 2.8-3.5 hours in adults, but the biological half-life (duration of HPA axis suppression) is 24-36 hours due to prolonged receptor occupancy
2-4 hours; prolonged in renal impairment (up to 12 hours)
Renal (approximately 80% as inactive metabolites, <5% unchanged), biliary/fecal (minor, approximately 15-20%)
Renal: 70% unchanged; Fecal: 20%; Biliary: 10%
Category C
Category C
Corticosteroid
Corticosteroid