Comparative Pharmacology
Head-to-head clinical analysis: ARSENIC TRIOXIDE versus HYDREA.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ARSENIC TRIOXIDE versus HYDREA.
ARSENIC TRIOXIDE vs HYDREA
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Arsenic trioxide induces apoptosis in acute promyelocytic leukemia (APL) cells through degradation of PML-RARα fusion protein and modulation of mitochondrial pathways.
Hydroxyurea inhibits ribonucleotide reductase, thereby reducing the conversion of ribonucleotides to deoxyribonucleotides, which impairs DNA synthesis and leads to cell cycle arrest in S phase. It also induces fetal hemoglobin (HbF) production by increasing nitric oxide and soluble guanylyl cyclase activity.
0.15 mg/kg IV daily until remission, then 0.15 mg/kg IV 5 days per week for 5 weeks (consolidation); dose based on actual body weight.
20-30 mg/kg orally once daily; typical adult dose 500 mg to 1.5 g daily. Maximum dose 2 g per day.
None Documented
None Documented
Clinical Note
moderateArsenic trioxide + Digoxin
"Arsenic trioxide may decrease the cardiotoxic activities of Digoxin."
Clinical Note
moderateArsenic trioxide + Digitoxin
"Arsenic trioxide may decrease the cardiotoxic activities of Digitoxin."
Clinical Note
moderateArsenic trioxide + Deslanoside
"Arsenic trioxide may decrease the cardiotoxic activities of Deslanoside."
Clinical Note
moderateArsenic trioxide + Acetyldigitoxin
Terminal elimination half-life of inorganic arsenic is approximately 10–14 hours for the trivalent form, but for total arsenic (including methylated metabolites) the half-life ranges from 10 to 32 hours. Clinical context: due to extensive tissue distribution and metabolic conversion, the effective half-life for pharmacodynamic effect is prolonged, with repeated dosing leading to accumulation. The terminal half-life is biphasic: an initial distribution phase of about 2 hours and a terminal phase of 10–14 hours.
The terminal elimination half-life is approximately 3-4 hours in patients with normal renal function. In patients with creatinine clearance <60 mL/min, half-life may be prolonged up to 8-12 hours, necessitating dose adjustment.
Primarily renal excretion; after intravenous administration, approximately 15% of the dose is excreted unchanged in urine over 24 hours. Biliary/fecal excretion accounts for less than 5% as unchanged drug; the majority is eliminated as methylated metabolites (monomethylarsonic acid and dimethylarsinic acid) via urine, with total urinary excretion of arsenic species reaching 60-85% of the dose within 14 days.
Renal excretion is the primary route of elimination, with 50-80% of an administered dose recovered as unchanged drug in urine within 24 hours. Biliary/fecal excretion accounts for less than 10%.
Category C
Category C
Antineoplastic
Antineoplastic
"Arsenic trioxide may decrease the cardiotoxic activities of Acetyldigitoxin."