Zispin

1 INDICATIONS AND USAGE Mirtazapine tablets are indicated for the treatment of major depressive disorder (MDD) in adults [see Clinical Studies (14) ]. Mirtazapine tablets are indicated for the treatment of major depressive disorder (MDD) in adults. ( 1 )

2 DOSAGE AND ADMINISTRATION • Starting dose: 15 mg once daily; may increase up to maximum recommended dose of 45 mg once daily. ( 2.1 ) • Administer orally once daily, preferably in the evening prior to sleep. ( 2.1 ) • Reduce dose gradually when discontinuing mirtazapine tablets. ( 2.6 , 5.13 ) 2.1 Recommended Dosage The recommended starting dose of mirtazapine tablets is 15 mg once daily, administered orally, preferably in the evening prior to sleep. If patients do not have an adequate response to the initial 15 mg dose, increase the dose up to a maximum of 45 mg per day. Dose changes should not be made in intervals of less than 1 to 2 weeks to allow sufficient time for evaluation of response to a given dose [see Clinical Pharmacology (12.3) ]. 2.3 Screen for Bipolar Disorder Prior to Starting Mirtazapine Tablets Prior to initiating treatment with mirtazapine tablets or another antidepressant, screen patients for a personal or family history of bipolar disorder, mania, or hypomania [see Warnings and Precautions (5.8) ]. 2.4 Switching Patients 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 mirtazapine tablets. In addition, at least 14 days must elapse after stopping mirtazapine tablets before starting an MAOI antidepressant [see Contraindications (4) and Warnings and Precautions (5.3) ]. 2.5 Dosage Modifications Due to Drug Interactions Strong CYP3A Inducers An increase in dosage of mirtazapine tablets may be needed with concomitant strong CYP3A inducer (e.g., carbamazepine, phenytoin, rifampin) use. Conversely, a decrease in dosage of mirtazapine tablets may be needed if the CYP3A inducer is discontinued [see Drug Interactions (7) ]. Strong CYP3A Inhibitors A decrease in dosage of mirtazapine tablets may be needed with concomitant use of strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin). Conversely, an increase in…

12.2 Pharmacodynamics In preclinical studies, mirtazapine acts as an antagonist at α 2 -adrenergic inhibitory autoreceptors and heteroreceptors and as an antagonist at serotonin 5-HT 2 and 5-HT 3 receptors. Mirtazapine has no significant affinity for the 5-HT 1A and 5-HT 1B receptors. Mirtazapine also acts as an antagonist of histamine (H 1 ) receptors, peripheral α 1 -adrenergic receptors, and muscarinic receptors. Actions at these receptors may explain some of the other clinical effects of mirtazapine (e.g., its prominent somnolent effects and orthostatic hypotension may be explained by its inhibition of histamine (H 1 ) receptors and peripheral α 1 -adrenergic receptors, respectively). Cardiac Electrophysiology The effect of mirtazapine on QTc interval was assessed in healthy subjects. At a dose of 75 mg (1.67 times the maximum recommended dosage), mirtazapine does not prolong the QTc interval to a clinically meaningful extent.

6 ADVERSE REACTIONS The following adverse reactions are described in more detail in other sections of the prescribing information: • Hypersensitivity [see Contraindications (4) ] • Suicidal Thoughts and Behaviors [see Warnings and Precautions (5.1) ] • Agranulocytosis [see Warnings and Precautions (5.2) ] • Serotonin Syndrome [see Contraindications (4) , Warnings and Precautions (5.3) , Drug Interactions (7) ] • Angle-Closure Glaucoma [see Warnings and Precautions (5.4) ] • QT Prolongation and Torsades de Pointes [see Warnings and Precautions (5.5) ] • Increased Appetite and Weight Gain [see Warnings and Precautions (5.6) ] • Somnolence [see Warnings and Precautions (5.7) ] • Activation of Mania or Hypomania [see Warnings and Precautions (5.8) ] • Seizures [see Warnings and Precautions (5.9) ] • Elevated Cholesterol and Triglycerides [see Warnings and Precautions (5.10) ] • Hyponatremia [see Warnings and Precautions (5.11) ] • Transaminase Elevations [see Warnings and Precautions (5.12) ] • Discontinuation Syndrome [see Warnings and Precautions (5.13) ] • Use in Patients with Concomitant Illness [see Warnings and Precautions (5.14) ] Most common adverse reactions (≥5% or greater and twice placebo) were somnolence, increased appetite, weight gain, and dizziness. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Rising Health, LLC at 1-833-395-6928 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trial Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The data described below are from clinical trials in which mirtazapine was administered to 2796 patients in phase 2 and 3 clinical studies. The trials consisted of double-blind controlled and open-label studies, inpatient and outpatient studies, fixed dose, and titration studies.…

4 CONTRAINDICATIONS Mirtazapine tablets are contraindicated in patients: • Taking, or within 14 days of stopping, MAOIs (including the MAOIs linezolid and intravenous methylene blue) because of an increased risk of serotonin syndrome [see Warnings and Precautions (5.3) , Drug Interactions (7) ]. • With a known hypersensitivity to mirtazapine or to any of the excipients in mirtazapine tablets. Severe skin reactions, including Stevens-Johnson syndrome, bullous dermatitis, erythema multiforme and toxic epidermal necrolysis have been reported following the use of mirtazapine tablets [see Adverse Reactions 6.2 ]. • Concomitant use of monoamine oxidase inhibitors (MAOIs) or use within 14 days of stopping MAOIs. ( 2.4 , 4 , 7 ) • Known hypersensitivity to mirtazapine or any of the excipients in mirtazapine tablets. ( 4 )

5 WARNINGS AND PRECAUTIONS • Agranulocytosis: If sore throat, fever, stomatitis or signs of infection occur, along with a low white blood cell count, treatment with mirtazapine should be discontinued and the patient should be closely monitored. ( 5.2 ) • Serotonin Syndrome: Increased risk when co-administered with other serotonergic drugs (e.g., SSRI, SNRI, triptans), but also when taken alone. If it occurs, discontinue mirtazapine and initiate supportive treatment. ( 2.4 , 4 , 5.3 , 7 ) • Angle-Closure Glaucoma: Angle closure glaucoma has occurred in patients with untreated anatomically narrow angles treated with antidepressants. ( 5.4 ) • QTc Prolongation: Use mirtazapine with caution in patients with risk factors for QTc prolongation. ( 5.5 , 7 ) • Increased Appetite/Weight Gain: mirtazapine has been associated with increased appetite and weight gain. ( 5.6 ) • Somnolence: May impair judgment, thinking and/or motor skills. Use with caution when engaging in activities requiring alertness, such as driving or operating machinery. ( 5.7 , 7 ) • Activation of Mania/Hypomania: Screen patients for bipolar disorder prior to initiating treatment. ( 2.3 , 5.8 ) • Seizures: Use with caution in patients with a seizure disorder. ( 5.9 ) • Elevated Cholesterol/Triglycerides: Has been reported with mirtazapine use. ( 5.10 ) • Hyponatremia: May occur as a result of treatment with serotonergic antidepressants, including mirtazapine. ( 5.11 ) • Transaminase Elevations: Clinically significant elevations have occurred. Use with caution in patients with impaired hepatic function. ( 5.12 ) 5.1 Suicidal Thoughts and Behaviors in Adolescents and Young Adults In pooled analyses of placebo-controlled trials of antidepressant drugs (SSRIs and other antidepressant classes) that included approximately 77,000 adult patients and 4,500 pediatric patients, the incidence of suicidal thoughts and behaviors in antidepressant-treated patients age 24 years and younger was greater than in…

7 DRUG INTERACTIONS Table 5 includes clinically important drug interactions with mirtazapine [see Clinical Pharmacology (12.3) ]. Table 5: Clinically Important Drug Interactions with Mirtazapine Monoamine Oxidase Inhibitors (MAOIs) Clinical Impact The concomitant use of serotonergic drugs, including mirtazapine, and MAOIs increases the risk of serotonin syndrome. Intervention Mirtazapine is contraindicated in patients taking MAOIs, including MAOIs such as linezolid or intravenous methylene blue [see Dosage and Administration (2.4) , Contraindications (4) , Warnings and Precautions (5.3) ]. Examples selegiline, tranylcypromine, isocarboxazid, phenelzine, linezolid, methylene blue Other Serotonergic Drugs Clinical Impact The concomitant use of serotonergic drugs with mirtazapine increases the risk of serotonin syndrome. Intervention Monitor patients for signs and symptoms of serotonin syndrome, particularly during treatment initiation and dosage increases. If serotonin syndrome occurs, consider discontinuation of mirtazapine and/or concomitant serotonergic drugs [see Warnings and Precautions (5.3) ]. Examples SSRIs, SNRIs, triptans, tricyclic antidepressants, fentanyl, lithium, amphetamines, St. John’s Wort, tramadol, tryptophan, buspirone Strong CYP3A Inducers Clinical Impact The concomitant use of strong CYP3A inducers with mirtazapine decreases the plasma concentration of mirtazapine [see Clinical Pharmacology (12.3) ]. Intervention Increase the dose of mirtazapine if needed with concomitant CYP3A inducer use. Conversely, a decrease in dosage of mirtazapine may be needed if the CYP3A inducer is discontinued [see Dosage and Administration (2.5) ]. Examples phenytoin, carbamazepine, rifampin Strong CYP3A Inhibitors Clinical Impact The concomitant use of strong CYP3A inhibitors with mirtazapine may increase the plasma concentration of mirtazapine [see Clinical Pharmacology (12.3) ]. Intervention Decrease the dose of mirtazapine if needed with concomitant strong CYP3A…