Comparative Pharmacology
Head-to-head clinical analysis: PERPHENAZINE AND AMITRIPTYLINE HYDROCHLORIDE versus PROCHLORPERAZINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PERPHENAZINE AND AMITRIPTYLINE HYDROCHLORIDE versus PROCHLORPERAZINE.
PERPHENAZINE AND AMITRIPTYLINE HYDROCHLORIDE vs PROCHLORPERAZINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Perphenazine is a phenothiazine antipsychotic that blocks postsynaptic dopamine D2 receptors in the mesolimbic system, with additional antagonism at serotonin 5-HT2, alpha-1 adrenergic, histamine H1, and muscarinic M1 receptors. Amitriptyline is a tricyclic antidepressant that inhibits serotonin and norepinephrine reuptake, also antagonizing histamine H1, alpha-1 adrenergic, and muscarinic M1 receptors.
Prochlorperazine is a phenothiazine antipsychotic that acts as a dopamine D2 receptor antagonist in the chemoreceptor trigger zone (CTZ) and at high doses in the mesolimbic system. It also has anticholinergic and antiemetic effects.
Oral: Perphenazine 2-4 mg with amitriptyline 10-50 mg, administered 3-4 times daily. Maximum daily dose: perphenazine 24 mg, amitriptyline 150 mg.
5-10 mg IM/IV every 3-4 hours as needed; or 5-10 mg PO 3-4 times daily; or 25 mg PR twice daily. Maximum IM/IV: 40 mg/day; PO: 40 mg/day.
None Documented
None Documented
Clinical Note
moderateProchlorperazine + Fluticasone propionate
"The risk or severity of adverse effects can be increased when Prochlorperazine is combined with Fluticasone propionate."
Clinical Note
moderateProchlorperazine + Haloperidol
"The metabolism of Haloperidol can be decreased when combined with Prochlorperazine."
Clinical Note
moderateProchlorperazine + Methylphenidate
"The risk or severity of adverse effects can be increased when Prochlorperazine is combined with Methylphenidate."
Clinical Note
moderatePerphenazine: ~9-12 hours (range 8-20 h). Amitriptyline: ~15-24 hours (range 10-50 h). Clinical context: Steady-state reached in 3-10 days; amitriptyline's active metabolite nortriptyline has T½ ~18-35 h.
Terminal elimination half-life: 23-25 hours, with prolonged elimination in hepatic impairment.
Perphenazine: renal (0.5-2% unchanged), hepatic metabolism and biliary/fecal elimination (major). Amitriptyline: renal (<5% unchanged, 30-50% as metabolites), biliary/fecal (significant). Combined: ~70-80% renal (metabolites), ~20-30% fecal.
Renal: 70-80% (as metabolites), Fecal: 20-30% (unchanged and metabolites), Biliary: 10-15% of dose excreted in bile.
Category A/B
Category A/B
Typical Antipsychotic
Typical Antipsychotic / Antiemetic
Prochlorperazine + Quinagolide
"The therapeutic efficacy of Quinagolide can be decreased when used in combination with Prochlorperazine."