Comparative Pharmacology
Head-to-head clinical analysis: HEDULIN versus HEPARIN SODIUM 25 000 UNITS IN DEXTROSE 5.
Peer-Reviewed Evidence
Head-to-head clinical analysis: HEDULIN versus HEPARIN SODIUM 25 000 UNITS IN DEXTROSE 5.
HEDULIN vs HEPARIN SODIUM 25,000 UNITS IN DEXTROSE 5%
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
HEDULIN (phenindione) is an anticoagulant that inhibits vitamin K-dependent synthesis of coagulation factors II, VII, IX, and X in the liver, thereby reducing thrombus formation.
Heparin sodium binds to antithrombin III (ATIII), inducing a conformational change that accelerates ATIII-mediated inactivation of factor Xa and thrombin (factor IIa), thereby inhibiting coagulation.
Oral, 200-400 mg initially, then 100-200 mg every 6-12 hours; maximum daily dose 1200 mg.
Initial IV bolus of 5000 units, followed by continuous IV infusion at 1300 units/hour (typically 25,000 units in 500 mL D5W at 26 mL/hour) for therapeutic anticoagulation; dose titrated to aPTT 1.5-2.5 times control.
None Documented
None Documented
Terminal elimination half-life is 18-24 hours in patients with normal renal function; may be prolonged to 30-40 hours in renal impairment, necessitating dose adjustment.
Terminal elimination half-life is approximately 1.5 hours (range 1–2 hours) after intravenous administration; dose-dependent: at therapeutic doses, half-life is about 1 hour; at higher doses, up to 2.5 hours. Clinical context: shorter half-life in pulmonary embolism, longer in renal impairment.
Renal excretion of unchanged drug accounts for approximately 70% of elimination; the remainder is metabolized hepatically and excreted in feces via bile.
Renal: negligible; primarily metabolized by the liver and reticuloendothelial system; small amount excreted unchanged in urine (<5%). Biliary/fecal: minimal.
Category C
Category A/B
Anticoagulant
Anticoagulant