Comparative Pharmacology
Head-to-head clinical analysis: MELLARIL versus PROMAZINE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MELLARIL versus PROMAZINE HYDROCHLORIDE.
MELLARIL vs PROMAZINE HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Thioridazine is a phenothiazine antipsychotic that blocks postsynaptic mesolimbic dopaminergic D1 and D2 receptors, and also blocks alpha-adrenergic receptors, histamine H1 receptors, and muscarinic M1 receptors.
Promazine hydrochloride is a phenothiazine antipsychotic that blocks postsynaptic dopamine D2 receptors in the mesolimbic system, as well as histamine H1, alpha-1 adrenergic, and muscarinic cholinergic receptors. It also has moderate serotonin and weak serotonin-dopamine antagonist effects.
Typical adult dose: 10-25 mg orally 3 times daily. Maximum dose: 200 mg/day.
25-50 mg intramuscularly every 4-6 hours as needed. Maximum 150 mg/day.
None Documented
None Documented
Terminal elimination half-life 21-24 hours; steady-state achieved within 5-7 days
Terminal elimination half-life: 12-18 hours; in elderly or hepatic impairment may extend to 30 hours
Primarily renal (70-80% as metabolites, <1% unchanged); biliary/fecal (20-30%)
Primarily renal (approx. 70-80% as metabolites, <1% unchanged); minor biliary/fecal (approx. 15-20%)
Category C
Category C
Antipsychotic
Antipsychotic