Comparative Pharmacology
Head-to-head clinical analysis: SAPHRIS versus ZYPREXA ZYDIS.
Peer-Reviewed Evidence
Head-to-head clinical analysis: SAPHRIS versus ZYPREXA ZYDIS.
SAPHRIS vs ZYPREXA ZYDIS
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Asenapine is an atypical antipsychotic with high affinity for serotonin 5-HT2A, 5-HT2C, 5-HT6, and 5-HT7 receptors; dopamine D2, D3, and D4 receptors; and alpha2-adrenergic receptors. It also has moderate affinity for histamine H1 and alpha1-adrenergic receptors, and low affinity for muscarinic M1 receptors.
Olanzapine is an atypical antipsychotic with high affinity for serotonin 5-HT2A and 5-HT2C receptors, dopamine D1-D4 receptors, muscarinic M1-M5 receptors, histamine H1 receptors, and alpha1-adrenergic receptors. Antagonism at D2 and 5-HT2A receptors is primarily responsible for its antipsychotic effects.
5 mg sublingually twice daily, may increase to 10 mg twice daily based on tolerability and efficacy.
10 mg orally once daily; range 5-20 mg once daily. Initial dose 5-10 mg, titrate by 5 mg weekly. Maximum 20 mg/day. Orally disintegrating tablet.
None Documented
None Documented
Terminal elimination half-life is 30-40 hours, supporting once-daily dosing.
Terminal elimination half-life: ~30 hours (range 21–54 hours) in healthy adults; prolonged in elderly (mean 51.8 h) and hepatic impairment.
After oral administration, approximately 50% of the dose is excreted in urine (mostly as metabolites, <1% unchanged) and 40% in feces (mostly as metabolites).
Renal: ~57% (as metabolites); Fecal: ~30% (as metabolites); Unchanged olanzapine in urine <7%.
Category C
Category C
Atypical Antipsychotic
Atypical Antipsychotic