VILAZODONE HYDROCHLORIDE
Brand names: vilazodone hydrochloride, Vilazodone Hydrochloride, VILAZODONE HYDROCHLORIDE, VIIBRYD, Vilazodone hydrochloride
Boxed warning
WARNING: SUICIDAL THOUGHTS AND BEHAVIORS Antidepressants increased the risk of suicidal thoughts and behaviors in pediatric and young adult patients in short-term studies. Closely monitor all antidepressant-treated patients for clinical worsening and for emergence of suicidal thoughts and behaviors [see Warnings and Precautions ( 5.1 )] . Vilazodone hydrochloride tablets are not approved for use in pediatric patients [see Use in Specific Populations ( 8.4) ] . WARNING: SUICIDAL THOUGHTS AND BEHAVIORS See full prescribing information for complete boxed warning. Antidepressants increase the risk of suicidal thoughts and behaviors in pediatric and young adult patients. ( 5.1 ) Closely monitor all antidepressant-treated patients for clinical worsening and emergence of suicidal thoughts and behaviors. ( 5.1 ) Vilazodone hydrochloride tablets are not approved for use in pediatric patients. ( 8.4 )
Warnings
Contraindications
4 CONTRAINDICATIONS Vilazodone hydrochloride tablets are contraindicated in: Patients taking, or within 14 days of stopping, monoamine oxidase inhibitors (MAOIs), including MAOIs such as linezolid or intravenous methylene blue, because of an increased risk of serotonin syndrome [see Warnings and Precautions ( 5.2 ), Drug Interactions ( 7 )] . Concomitant use of monoamine oxidase inhibitors (MAOIs), or use within 14 days of stopping MAOIs. ( 4 )
Overdose
10 OVERDOSAGE There is limited clinical trial experience regarding human overdose with vilazodone hydrochloride. The adverse reactions associated with overdose of vilazodone hydrochloride at doses of 200 mg to 280 mg (5 to 7 times the recommended dosage) as observed in clinical trials included serotonin syndrome, lethargy, restlessness, hallucinations, and disorientation. For current information on the management of poisoning or overdose, contact a poison control center at 1-800-222-1222. No specific antidotes for vilazodone are known. Removal of vilazodone by dialysis has not been studied; however, the high volume of distribution of vilazodone suggests that dialysis will not be effective in reducing vilazodone plasma concentrations.
Drug interactions
7 DRUG INTERACTIONS CYP3A4 Inhibitors: The vilazodone hydrochloride tablets dose should not exceed 20 mg once daily when coadministered with strong CYP3A4 inhibitors. ( 2.4 , 7 ) CYP3A4 Inducers: Consider increasing vilazodone hydrochloride tablets dosage by 2-fold, up to 80 mg once-daily over 1 to 2 weeks when used concomitantly with strong CYP3A4 inducers for greater than 14 days. ( 2.4 , 7 ) 7.1 Drugs Having Clinically Important Interactions with Vilazodone Hydrochloride Table 4: Clinically Important Drug Interactions with Vilazodone Hydrochloride Concomitant Drug Name or Drug Class Clinical Rationale Clinical Recommendation Monoamine Oxidase Inhibitors (MAOIs) The concomitant use of MAOIs and serotonergic drugs including vilazodone hydrochloride increases the risk of serotonin syndrome. Vilazodone hydrochloride is contraindicated in patients taking MAOIs, including MAOIs such as linezolid or intravenous methylene blue [see Contraindications ( 4 ), Dosage and Administration ( 2.3 ), and Warnings and Precautions ( 5.2 )] . Other Serotonergic Drugs Concomitant use of vilazodone hydrochloride with other serotonergic drugs (including other SSRIs, SNRIs, triptans, tricyclic antidepressants, opioids, lithium, buspirone, amphetamines, tryptophan, and St. John’s Wort) increases the risk of serotonin syndrome. Monitor patients for signs and symptoms of serotonin syndrome, particularly during vilazodone hydrochloride initiation. If serotonin syndrome occurs, consider discontinuation of vilazodone hydrochloride and/or concomitant serotonergic drugs [see Warnings and Precautions ( 5.2 )] . Antiplatelet Agents and Anticoagulants Serotonin release by platelets plays an important role in hemostasis. The concurrent use of an antiplatelet agent or anticoagulant with vilazodone hydrochloride may potentiate the risk of bleeding. Inform patients of the increased risk of bleeding with the concomitant use of vilazodone hydrochloride and antiplatelet agents and anticoagulants. For patients taking warfarin, carefully monitor the international normalized ratio (INR) when initiating, titrating, or discontinuing vilazodone hydrochloride [see Warnings and Precautions ( 5.3 )] . Strong CYP3A4 Inhibitors (e.g., itraconazole, clarithromycin, voriconazole) The concomitant use of vilazodone hydrochloride and strong CYP3A4 inhibitors increased the exposure of vilazodone compared to the use of vilazodone hydrochloride alone [see Clinical Pharmacology ( 12.3 )] . The vilazodone hydrochloride dose should not exceed 20 mg once daily with the concomitant use of a strong CYP3A4 inhibitor [see Dosage and Administration ( 2.4 ), Clinical Pharmacology ( 12.3 )] . Strong CYP3A4 Inducers (e.g., carbamazepine, phenytoin, rifampin) The concomitant use of vilazodone hydrochloride and strong CYP3A4 inducers decreased the exposure of vilazodone compared to the use of vilazodone hydrochloride alone [see Clinical Pharmacology ( 12.3 )] . Based on clinical response, consider increasing the dosage of vilazodone hydrochloride, over 1 to 2 weeks in patients taking strong CYP3A4 inducers for greater than 14 days [see Dosage and Administration ( 2.4 ), Clinical Pharmacology ( 12.3 )] . Digoxin Digoxin is a narrow therapeutic index drug. Concomitant use of vilazodone hydrochloride increased digoxin concentrations [see Clinical Pharmacology ( 12.3 )] . Measure serum digoxin concentrations before initiating concomitant use of vilazodone hydrochloride. Continue monitoring and reduce digoxin dose as necessary. 7.2 Drugs Having No Clinically Important Interactions with Vilazodone Hydrochloride Based on pharmacokinetic studies, no dosage adjustment is required for drugs that are substrates of CYP1A2, CYP2B6, CYP2C9, CYP2C19, CYP2D6, CYP3A4, and/or P-glycoprotein (except narrow therapeutic index drugs, e.g., digoxin), when vilazodone hydrochloride is administered concomitantly [see Drug Interactions ( 7.1 ), Clinical Pharmacology ( 12.3 )] .
Uses
1 INDICATIONS AND USAGE Vilazodone hydrochloride tablets are indicated for the treatment of major depressive disorder (MDD) in adults [see Clinical Studies (14) ]. Vilazodone hydrochloride tablets are indicated for the treatment of major depressive disorder (MDD) in adults ( 1 ).
Dosage forms & strengths
2 DOSAGE AND ADMINISTRATION Recommended target dosage: 20 mg to 40 mg once daily with food. ( 2.1 , 12.3 ) To titrate: start with initial dosage of 10 mg once daily for 7 days, followed by 20 mg once daily. The dose may be increased up to 40 mg once daily after a minimum of 7 days between dosage increases. ( 2.1 ) Prior to initiating vilazodone hydrochloride tablets, screen for bipolar disorder. ( 2.2 , 5.4 ) When discontinuing vilazodone hydrochloride tablets, reduce dosage gradually. ( 2.4 , 5.5 ) 2.1 Dosage for Treatment of Major Depressive Disorder The recommended target dosage for vilazodone hydrochloride tablets is 20 mg to 40 mg orally once daily with food [see Clinical Pharmacology ( 12.3 ), Clinical Studies ( 14 )] . To achieve the target dosage, titrate vilazodone hydrochloride tablets as follows: Start with an initial dosage of 10 mg once daily with food for 7 days, Then increase to 20 mg once daily with food. The dose may be increased up to 40 mg once daily with food after a minimum of 7 days between dosage increases. If a dose is missed, it should be taken as soon as the patient remembers. If it is almost time for the next dose, the patient should skip the missed dose and take the next dose at the regular time. Two doses should not be taken at the same time. 2.2 Screen for Bipolar Disorder Prior to Starting Vilazodone Hydrochloride Tablets Prior to initiating treatment with vilazodone hydrochloride tablets or another antidepressant, screen patients for a personal or family history of bipolar disorder, mania, or hypomania [see Warnings and Precautions ( 5.4 )] . 2.3 Switching to or from a Monoamine Oxidase Inhibitor Antidepressant At least 14 days must elapse between discontinuation of a monoamine oxidase inhibitor (MAOI) antidepressant and initiation of vilazodone hydrochloride tablets. In addition, at least 14 days must elapse after stopping vilazodone hydrochloride tablets before starting an MAOI antidepressant [see Contraindications ( 4 ), Warnings and Precautions ( 5.2 )] . 2.4 Dosage Adjustments with CYP3A4 Inhibitors or Inducers Patients receiving concomitant CYP3A4 inhibitors : During concomitant use of a strong CYP3A4 inhibitor (e.g., itraconazole, clarithromycin, voriconazole), the vilazodone hydrochloride tablets dose should not exceed 20 mg once daily. The original vilazodone hydrochloride tablet dose level, can be resumed when the CYP3A4 inhibitor is discontinued [see Drug Interactions ( 7 )] . Patients receiving concomitant CYP3A4 inducers : Based on clinical response, consider increasing the dosage of vilazodone hydrochloride tablets by 2-fold, up to a maximum 80 mg once daily, over 1 to 2 weeks in patients taking strong CYP3A4 inducers (e.g., carbamazepine, phenytoin, rifampin) for greater than 14 days. If CYP3A4 inducers are discontinued, gradually reduce the vilazodone hydrochloride tablets dosage to its original level over 1 to 2 weeks [see Drug Interactions ( 7 )] . 2.5 Discontinuing Treatment with Vilazodone Hydrochloride Tablets Adverse reactions may occur upon discontinuation of vilazodone hydrochloride tablets [see Warnings and Precautions ( 5.5 )] . A gradual reduction in dosage rather than abrupt cessation is recommended whenever possible. Vilazodone hydrochloride tablets should be down tapered from the 40 mg once daily dose to 20 mg once daily for 4 days, followed by 10 mg once daily for 3 days. Patients taking vilazodone hydrochloride tablets 20 mg once daily should be tapered to 10 mg once daily for 7 days.