Comparative Pharmacology
Head-to-head clinical analysis: MAXOLON versus PROMETHAZINE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MAXOLON versus PROMETHAZINE.
MAXOLON vs PROMETHAZINE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Metoclopramide, the active ingredient in MAXOLON, is a dopamine D2 receptor antagonist and also enhances the response to acetylcholine at muscarinic receptors in the gastrointestinal tract, leading to increased gastric motility and accelerated gastric emptying. It also has antiemetic effects by blocking dopamine receptors in the chemoreceptor trigger zone (CTZ).
Promethazine is a phenothiazine derivative that acts as a potent histamine H1 receptor antagonist, thereby blocking the effects of histamine. It also has central anticholinergic, antiemetic, and sedative properties, likely mediated through antagonism at muscarinic, dopamine D2, and serotonin receptors in the brain.
10 mg orally, intramuscularly, or intravenously three to four times daily. Maximum daily dose: 30 mg or 0.5 mg/kg.
12.5-25 mg IM or IV every 4-6 hours; also 25 mg PO or PR every 6-8 hours. Maximum 100 mg/day.
None Documented
None Documented
Clinical Note
moderatePromethazine + Risedronic acid
"Promethazine can cause an increase in the absorption of Risedronic acid resulting in an increased serum concentration and potentially a worsening of adverse effects."
Clinical Note
moderatePromethazine + Methylphenidate
"Promethazine can cause an increase in the absorption of Methylphenidate resulting in an increased serum concentration and potentially a worsening of adverse effects."
Clinical Note
moderatePromethazine + Artesunate
"The serum concentration of Artesunate can be increased when it is combined with Promethazine."
Clinical Note
moderate5-6 hours in adults with normal renal function; prolonged to 15-20 hours in severe renal impairment (CrCl <10 mL/min).
Terminal elimination half-life 9-16 hours; may be prolonged in hepatic impairment.
Renal: 85-95% as unchanged drug and metabolites; biliary/fecal: <5%.
Renal (70-80% as metabolites, <1% unchanged); biliary/fecal minor.
Category C
Category A/B
Antiemetic
Antihistamine / Antiemetic
Promethazine + Clotrimazole
"The metabolism of Clotrimazole can be decreased when combined with Promethazine."