Comparative Pharmacology
Head-to-head clinical analysis: PROMETHAZINE versus ZUPLENZ.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PROMETHAZINE versus ZUPLENZ.
PROMETHAZINE vs ZUPLENZ
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
Competitive serotonin 5-HT3 receptor antagonist; acts centrally on the chemoreceptor trigger zone and peripherally on GI vagal nerve terminals to inhibit emesis.
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.
8 mg administered intraorally as a single dose 1 hour before chemotherapy; may repeat once if vomiting occurs within 30 minutes after initial dose.
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
moderateTerminal elimination half-life 9-16 hours; may be prolonged in hepatic impairment.
Terminal elimination half-life 3.5 hours; in hepatic impairment increases to 7-9 hours
Renal (70-80% as metabolites, <1% unchanged); biliary/fecal minor.
Renal 70% unchanged, fecal 20% (including biliary metabolites), 10% metabolized
Category A/B
Category C
Antihistamine / Antiemetic
Antiemetic
Promethazine + Clotrimazole
"The metabolism of Clotrimazole can be decreased when combined with Promethazine."