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12.1 Mechanism of Action The mechanism of action of quetiapine in the listed indications is unclear. However, the efficacy of quetiapine in these indications could be mediated through a combination of dopamine type 2 (D 2 ) and serotonin type 2 (5HT 2 ) antagonism. The active metabolite, N-desalkyl quetiapine (norquetiapine), has similar activity at D 2 , but greater activity at 5HT2A receptors, than the parent drug (quetiapine).

1 INDICATIONS & USAGE Quetiapine is an atypical antipsychotic indicated for the treatment of: Schizophrenia ( 1.1 ) Bipolar I disorder manic episodes ( 1.2 ) Bipolar disorder, depressive episodes ( 1.2 ) 1.1 Schizophrenia Quetiapine is indicated for the treatment of schizophrenia. The efficacy of quetiapine in schizophrenia was established in three 6-week trials in adults and one 6-week trial in adolescents (13 to 17 years). The effectiveness of quetiapine for the maintenance treatment of schizophrenia has not been systematically evaluated in controlled clinical trials [ see Clinical Studies (14.1) ]. 1.2 Bipolar Disorder Quetiapine is indicated for the acute treatment of manic episodes associated with bipolar I disorder, both as monotherapy and as an adjunct to lithium or divalproex. Efficacy was established in two 12-week monotherapy trials in adults, in one 3-week adjunctive trial in adults, and in one 3-week monotherapy trial in pediatric patients (10 to 17 years) [ see Clinical Studies (14.2) ]. Quetiapine is indicated as monotherapy for the acute treatment of depressive episodes associated with bipolar disorder. Efficacy was established in two 8-week monotherapy trials in adult patients with bipolar I and bipolar II disorder [ see Clinical Studies (14.2) ]. Quetiapine is indicated for the maintenance treatment of bipolar I disorder, as an adjunct to lithium or divalproex. Efficacy was established in two maintenance trials in adults. The effectiveness of quetiapine as monotherapy for the maintenance treatment of bipolar disorder has not been systematically evaluated in controlled clinical trials [ see Clinical Studies (14.2) ]. 1.3 Special Considerations in Treating Pediatric Schizophrenia and Bipolar I Disorder Pediatric schizophrenia and bipolar I disorder are serious mental disorders, however, diagnosis can be challenging. For pediatric schizophrenia, symptom profiles can be variable, and for bipolar I disorder, patients may have variable patterns of periodicity of manic or mixed symptoms. It is recommended that medication therapy for pediatric schizophrenia and bipolar I disorder be initiated only after a thorough diagnostic evaluation has been performed and careful consideration given to the risks associated with medication treatment. Medication treatment for both pediatric schizophrenia and bipolar I disorder is indicated as part of a total treatment program that often includes psychological, educational and social interventions.

2 DOSAGE & ADMINISTRATION · Quetiapine tablets, USP can be taken with or without food ( 2.1 ) Indication Initial Dose Recommended Dose Maximum Dose Schizophrenia-Adults (2.2) 25 mg twice daily 150 to 750 mg/day 750 mg/day Schizophrenia-Adolescents (13 to 17 years) (2.2) 25 mg twice daily 400 to 800 mg/day 800 mg/day Bipolar Mania- Adults Monotherapy or as an adjunct to lithium or divalproex (2.2) 50 mg twice daily 400 to 800 mg/day 800 mg/day Bipolar Mania- Children and Adolescents (10 to 17 years), Monotherapy (2.2) 25 mg twice daily 400 to 600 mg/day 600 mg/day Bipolar Depression-Adults (2.2) 50 mg once daily at bedtime 300 mg/day 300 mg/day Geriatric Use: Consider a lower starting dose (50 mg/day), slower titration and careful monitoring during the initial dosing period in the elderly ( 2.3 , 8.5 ) Hepatic Impairment: Lower starting dose (25 mg/day) and slower titration may be needed ( 2.4 , 8.7 , 12.3 ) 2.1 Important Administration Instructions Quetiapine tablets, USP can be taken with or without food. 2.2 Recommended Dosing The recommended initial dose, titration, dose range and maximum quetiapine dose for each approved indication is displayed in Table 1. After initial dosing, adjustments can be made upwards or downwards, if necessary, depending upon the clinical response and tolerability of the patient [ see Clinical Studies ( 14.1 and 14.2 ) ]. Table 1: Recommended Dosing for quetiapine Indication Initial Dose and Titration Recommended Dose Maximum Dose Schizophrenia-Adults Day 1: 25 mg twice daily. Increase in increments of 25 mg-50 mg divided two or three times on Days 2 and 3 to range of 300 to 400 mg by Day 4. Further adjustments can be made in increments of 25 to 50 mg twice a day, in intervals of not less than 2 days. 150 to 750 mg/day 750 mg/day Schizophrenia- Adolescents (13 to 17 years) Day 1: 25 mg twice daily. Day 2: Twice daily dosing totaling 100 mg. Day 3: Twice daily dosing totaling 200 mg. Day 4: Twice daily dosing totaling 300 mg. Day 5: Twice daily dosing totaling 400 mg. Further adjustments should be in increments no greater than 100 mg/day within the recommended dose range of 400-800 mg/day. Based on response and tolerability, may be administered three times daily. 400 to 800 mg/day 800 mg/day Schizophrenia-Maintenance Not applicable. 400 to 800 mg/day 800 mg/day Bipolar Mania- Adults Monotherapy or as an adjunct to lithium or divalproex Day 1: Twice daily dosing totaling 100 mg. Day 2: Twice daily dosing totaling 200 mg....

The following are discussed in more detail in other sections of the labeling: Increased mortality in elderly patients with dementia-related psychosis [see (5.1) ] Suicidal thoughts and behaviors in adolescents and young adults [see (5.2) ] Cerebrovascular , including stroke in elderly patients with dementia-related psychosis [see (5.3 )] Neuroleptic Malignant Syndrome (NMS) [see (5.4 )] Metabolic changes (hyperglycemia, dyslipidemia, weight gain) [see (5.5 )] Tardive dyskinesia [see (5.6 )] Hypotension [see (5.7 )] Falls [ see (5.8) ] Increases in blood pressure (children and adolescents) [see ( 5.9 )] Leukopenia, neutropenia and agranulocytosis [see ( 5.10 )] Cataracts [see ( 5.11 )] QT Prolongation [see ( 5.12 )] Seizures [see ( 5.13 )] Hypothyroidism [see ( 5.14 )] Hyperprolactinemia [see ( 5.15 )] Potential for cognitive and motor impairment [see ( 5.16 )] Body temperature regulation [see ( 5.17 )] Dysphagia [see ( 5.18 )] Discontinuation Syndrome [see ( 5.19 )] Anticholinergic (antimuscarinic) Effects [see ( 5.20 )] • Most common (incidence ≥ 5% and twice placebo): Adults: somnolence, dry mouth, dizziness, constipation, asthenia, abdominal pain, postural hypotension, pharyngitis, weight gain, lethargy, ALT increased, dyspepsia ( 6.1 ) • Children and Adolescents: somnolence, dizziness, fatigue, increased appetite, nausea, vomiting, dry mouth, tachycardia, weight increased ( 6.1 ) To report SUSPECTED , contact Ascend Laboratories, LLC at 1-877-ASC-RX01 (877-272-7901) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch 6.1 Clinical Study Experience Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice. Adults: The information below is derived from a clinical trial database for quetiapine consisting of over 4,300 patients. This database includes 698 patients exposed to quetiapine for the treatment of bipolar depression, 405 patients exposed to quetiapine for the treatment of acute bipolar mania (monotherapy and adjunct therapy), 646 patients exposed to quetiapine for the maintenance treatment of bipolar I disorder as adjunct therapy, and approximately 2600 patients and/or normal subjects exposed to 1 or more doses of quetiapine for the treatment of schizophrenia....

Hypersensitivity to quetiapine or to any excipients in the quetiapine formulation. Anaphylactic reactions have been reported in patients treated with quetiapine. Known hypersensitivity to quetiapine or any components in the formulation. ( 4 )