Overview
11 DESCRIPTION COBENFY is a combination of xanomeline, a muscarinic agonist, and trospium chloride, a muscarinic antagonist. The chemical name of xanomeline tartrate is pyridine, 3-[4-(hexyloxy)-1,2,5-thiadiazol-3-yl]-1,2,5,6-tetrahydro-1-methyl-, (2R,3R)-2,3-dihydroxybutanedioate (1:1). Its molecular formula is C 14 H 23 N 3 OS.C 4 H 6 O 6 and its molecular weight is 431.51 g/mol.
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action The mechanism of action of xanomeline in the treatment of schizophrenia is unclear; however, its efficacy is thought to be due to its agonist activity at M1 and M4 muscarinic acetylcholine receptors in the central nervous system. Trospium chloride is a muscarinic antagonist. Trospium chloride antagonizes the muscarinic receptors primarily in the peripheral tissues. 12.2 Pharmacodynamics Xanomeline binds to muscarinic receptors M1 to M5 with comparable affinity (Ki=10, 12, 17, 7, and 22 nM for the M1, M2, M3, M4, and M5 receptors, respectively) and exhibits higher agonist activity at the M1 and M4 receptors. Trospium chloride antagonizes the muscarinic receptors primarily in peripheral tissues.
Indications
- 1 INDICATIONS AND USAGE COBENFY is indicated for the treatment of schizophrenia in adults. COBENFY is a combination of xanomeline, a muscarinic agonist, and trospium chloride, a muscarinic antagonist, indicated for the treatment of schizophrenia in adults. ( 1 )
Common Doses
- 50 mg
- 20 mg
- 100 mg
- 125 mg
Dosage
2 DOSAGE AND ADMINISTRATION • Assess liver enzymes and bilirubin prior to initiating treatment with COBENFY and as clinically indicated during treatment. ( 2.1 ) • Assess heart rate at baseline and as clinically indicated during treatment with COBENFY. ( 2.1 ) • Recommended starting dosage of COBENFY is 50 mg/20 mg orally twice daily for at least two days, then increase the dosage to 100 mg/20 mg twice daily for at least five days. ( 2.2 ) • Dosage may be increased to 125 mg/30 mg orally twice daily based on patient tolerability and response. ( 2.
Contraindications
- 4 CONTRAINDICATIONS COBENFY is contraindicated in patients with: • urinary retention [see Warnings and Precautions (5.1) ] . • moderate (Child-Pugh Class B) or severe (Child-Pugh Class C) hepatic impairment [see Warnings and Precautions (5.2) ] . • gastric retention [see Warnings and Precautions (5.4) ] . • history of hypersensitivity to COBENFY or trospium chloride. Angioedema has been reported with COBENFY and trospium chloride [see Warnings and Precautions (5.5) ] . • untreated narrow-angle glaucoma [see Warnings and Precautions (5.6) ] .
Side Effects
- 6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: • Risk of Urinary Retention [see Warnings and Precautions (5.1) ] • Risk of Use in Patients with Hepatic Impairment [see Warnings and Precautions (5.2) ] • Risk of Use in Patients with Biliary Disease [see Warnings and Precautions (5.3) ] • Decreased Gastrointestinal Motility [see Warnings and Precautions (5.4) ] • Risk of Angioedema [see Warnings and Precautions (5.5) ] • Risk of Use in Patients with Narrow-angle Glaucoma [see Warnings and Precautions (5.
Interactions
- 7 DRUG INTERACTIONS • Drugs Eliminated by Active Tubular Secretion: Monitor for increased frequency and/or severity of adverse reactions related to COBENFY and to drugs eliminated by active tubular secretion. ( 7.1 ) • Strong CYP2D6 Inhibitors: Monitor for increased frequency and/or severity of COBENFY-related adverse reactions. ( 7.1 ) • Sensitive Substrates of CYP3A4 or P-glycoprotein: Monitor for increased frequency and/or severity of adverse reactions from these substrates. ( 7.1 ) • Antimuscarinic Drugs: Monitor for increased frequency or severity of anticholinergic adverse reactions.