paroxetine hydrochloride

Warnings and Precautions ( 5.2 , 5.5 ) 8/2023

1 INDICATIONS AND USAGE Paroxetine tablets are indicated in adults for the treatment of: Major depressive disorder (MDD) Obsessive compulsive disorder (OCD) Panic disorder (PD) Social anxiety disorder (SAD) Generalized anxiety disorder (GAD) Posttraumatic stress disorder (PTSD) Paroxetine is a selective serotonin reuptake inhibitor (SSRI) indicated in adults for the treatment of ( 1 ): Major Depressive Disorder (MDD) Obsessive Compulsive Disorder (OCD) Panic Disorder (PD) Social Anxiety Disorder (SAD) Generalized Anxiety Disorder (GAD) Posttraumatic Stress Disorder (PTSD)

2 DOSAGE AND ADMINISTRATION Recommended starting and maximum daily dosage for MDD, OCD, PD, and PTSD: ( 2.2 ) Indication Starting Daily Dose Maximum Daily Dose MDD 20 mg 50 mg OCD 20 mg 60 mg PD 10 mg 60 mg PTSD 20 mg 50 mg Recommended starting dosage for SAD and GAD is 20 mg daily. ( 2.3 ) Elderly patients, patients with severe renal impairment or severe hepatic impairment: Starting dosage is 10 mg daily. Maximum dosage is 40 mg daily. ( 2.4 ) When discontinuing paroxetine tablets, reduce dosage gradually. ( 2.6 , 5.7 ) 2.1 Administration Information Administer paroxetine tablets as a single daily dose in the morning, with or without food. 2.2 Recommended Dosage for MDD, OCD, PD, and PTSD The recommended starting dosages and maximum dosages of paroxetine tablets in patients with MDD, OCD, PD, and PTSD are presented in Table 1. In patients with an inadequate response, increase dosage in increments of 10 mg per day at intervals of at least 1 week, depending on tolerability. Table 1: Recommended Daily Dosage of Paroxetine Tablets in Patients with MDD, OCD, PD, and PTSD Indication Starting Dose Maximum Dose MDD 20 mg 50 mg OCD 20 mg 60 mg PD 10 mg 60 mg PTSD 20 mg 50 mg 2.3 Recommended Dosage for SAD and GAD SAD The starting and recommended dosage in patients with SAD is 20 mg daily. In clinical trials the effectiveness of paroxetine tablets was demonstrated in patients dosed in a range of 20 mg to 60 mg daily. While the safety of paroxetine tablets has been evaluated in patients with SAD at doses up to 60 mg daily, available information does not suggest any additional benefit for doses above 20 mg daily [see Clinical Studies (14.4) ]. GAD The starting and recommended dosage in patients with GAD is 20 mg daily. In clinical trials the effectiveness of paroxetine tablets in GAD was demonstrated in patients dosed in a range of 20 mg to 50 mg daily. There is not sufficient evidence to suggest a greater benefit to doses higher than 20 mg daily [see Clinical Studies (14.5) ] . In patients with an inadequate response, increase dosage in increments of 10 mg per day at intervals of at least 1 week, depending on tolerability. 2.4 Screen for Bipolar Disorder Prior to Starting Paroxetine Tablets Prior to initiating treatment with paroxetine tablets or another antidepressant, screen patients for a personal or family history of bipolar disorder, mania, or hypomania [see Warnings and Precautions (5.6) ]. 2.5 Recommended Dosage for Elderly Patients, Patients with Severe Renal Impairment, and Patients with Severe Hepatic Impairment The recommended initial dosage is 10 mg per day for elderly patients, patients with severe renal impairment, and patients with severe hepatic impairment. Dosage should not exceed 40 mg/day. 2.6 Switching Patients to or From a Monoamine Oxidase Inhibitor (MAOI) At least 14 days must elapse between discontinuation of a monoamine oxidase inhibitor (MAOI and initiation of paroxetine tablets. In addition, at least 14 days must elapse after stopping paroxetine tablets before starting an MAOI antidepressant [see Contraindications (4) , Warnings and Precautions (5.2) ] . 2.7 Discontinuation of Treatment With Paroxetine Tablets Adverse reactions may occur upon discontinuation of paroxetine tablets [see Warnings and Precautions (5.7) ]. Gradually reduce the dosage rather than stopping paroxetine tablets abruptly whenever possible.

3 DOSAGE FORMS AND STRENGTHS Paroxetine tablets, USP are available as: 10 mg yellow colored film-coated modified capsule shaped, biconvex tablets debossed with ‘C 55’ on one side and a deep breakline on the other side. 20 mg pink colored film-coated modified capsule shaped, biconvex tablets debossed with ‘56’ on one side and ‘C’ with a deep breakline on the other side. 30 mg blue colored film-coated modified capsule shaped, biconvex tablets debossed with ‘F’ on one side and ‘12’ on the other side. 40 mg pink colored film-coated modified capsule shaped, biconvex tablets debossed with ‘A 59’ on one side and plain on the other side. Tablets: 10 mg, scored; 20 mg, scored; 30 mg; and 40 mg tablets. ( 3 )

4 CONTRAINDICATIONS Paroxetine is 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 ( 5.2 ), Drug Interactions ( 7 )]. Taking thioridazine because of risk of QT prolongation [see Warnings and Precautions ( 5.3 ) and Drug Interactions ( 7 )]. T aking pimozide because of risk of QT prolongation [see Warnings and Precautions ( 5.3 ), Drug Interactions ( 7 )]. With known hypersensitivity (e.g., anaphylaxis, angioedema, Stevens-Johnson syndrome) to paroxetine or any of the inactive ingredients in paroxetine tablets, USP [see Adverse Reactions ( 6.1 ), ( 6.2 )] . Concomitant use of monoamine oxidase inhibitors (MAOIs) or use within 14 days of discontinuing a MAOI. ( 4 , 5.3 , 7 ) Concomitant use of pimozide or thioridazine. ( 4 , 5.3 , 7 ) Known hypersensitivity to paroxetine or to any of the inactive ingredients in paroxetine tablets. ( 4 )

6 ADVERSE REACTIONS The following adverse reactions are included in more detail in other sections of the prescribing information: Hypersensitivity reactions to paroxetine [see Contraindications (4) ] Suicidal Thoughts and Behaviors [see Warnings and Precautions (5.1) ] Serotonin Syndrome [see Warnings and Precautions (5.2) ] Embryofetal Toxicity [see Warnings and Precautions (5.4) ] Increased Risk of Bleeding [see Warnings and Precautions (5.5) ] Activation of Mania/Hypomania [see Warnings and Precautions (5.6) ] Discontinuation Syndrome [see Warnings and Precautions (5.7) ] Seizures [see Warnings and Precautions (5.8) ] Angle-closure Glaucoma [see Warnings and Precautions (5.9) ] Hyponatremia [see Warnings and Precautions (5.10) ] Bone Fracture [see Warnings and Precautions (5.12) ] Sexual Dysfunction [see Warnings and Precautions (5.13) ] Most common adverse reactions (≥5% and at least twice placebo) are abnormal ejaculation, asthenia, constipation, decreased appetite, diarrhea, dizziness, dry mouth, female genital disorder, impotence, infection, insomnia, libido decreased, male genital disorder, nausea, nervousness, somnolence, sweating, tremor, yawn. ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact Aurobindo Pharma USA, Inc. at 1-866-850-2876 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials 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 safety data for paroxetine are from: 6-week clinical trials in MDD patients who received paroxetine 20 mg to 50 mg once daily 12-week clinical trials in OCD patients who received paroxetine 20 mg to 60 mg once daily 10- to 12-week clinical trials in PD patients who received paroxetine 10 mg to 60 mg once daily 12-week clinical trials in SAD patients who received paroxetine 20 mg to 50 mg once daily 8-week clinical trials in GAD patients who received paroxetine 10 mg to 50 mg once daily 12-week clinical trials in PTSD patients who received paroxetine 20 mg to 50 mg once daily Adverse Reactions Leading to Discontinuation Twenty percent (1,199/6,145) of patients treated with paroxetine in clinical trials in MDD and 16.1% (84/522), 11.8% (64/542), 9.4% (44/469), 10.7% (79/735), and 11.7% (79/676) of patients treated with paroxetine in clinical trials in SAD, OCD, PD, GAD, and PTSD, respectively, discontinued treatment due to an adverse reaction. The most common adverse reactions (≥1%) associated with discontinuation (i.e., those adverse reactions associated with dropout at a rate approximately twice or greater for paroxetine compared to placebo) are presented in Table 3: Table 3: Adverse Reactions Reported as Leading to Discontinuation (≥1% of Paroxetine-Treated Patients and Greater than Placebo) in MDD, OCD, PD, SAD, GAD, and PTSD Trials Where numbers are not provided the incidence of the adverse reactions in patients treated with paroxetine was not >1% or was not greater than or equal to 2 times the incidence of placebo. a. Incidence corrected for gender. MDD OCD PD SAD GAD PTSD Paroxetine % Placebo % Paroxetine % Placebo % Paroxetine % Placebo % Paroxetine % Placebo % Paroxetine % Placebo % Paroxetine % Placebo % CNS Somnolence Insomnia Agitation Tremor Anxiety Dizziness 2.3 — 1.1 1.1 — — 0.7 — 0.5 0.3 — — — 1.7 — — — 1.5 0 0 1.9 1.3 0.3 0.3 3.4 3.1 1.7 1.1 1.9 0.3 0 0 0 0 2.0 1.0 0.2 0.2 2.8 — — 1.0 — — 0.6 — — 0.2 — — Gastrointestinal Constipation Nausea Diarrhea Dry mouth Vomiting Flatulence — 3.2 1.0 1.0 1.0 1.1 0.3 0.3 0.3 1.1 1.9 — — — 0 0 3.2 1.2 4.0 1.0 1.0 0.3 0 0.3 2.0 0.2 — 2.2 — — — — 0.6 — — — Other Asthenia Abnormal Ejaculation a Sweating Impotence a Libido Decreased 1.6 1.6 1.0 — 0.4 0 0.3 1.9 2.1 — 1.5 0.4 0 0 2.5 4.9 1.1 1.0 0.6 0.6 0 0 1.8 2.5 1.1 0.2 0.5 0.2 1.6 — — — — 0.2 — — — — Most Common Adverse Reactions The most …

7 DRUG INTERACTIONS Table 9 presents clinically significant drug interactions with paroxetine. Table 9: Clinically Significant Drug Interactions with Paroxetine Monoamine Oxidase Inhibitors (MAOIs) Clinical Impact The concomitant use of SSRIs, including paroxetine, and MAOIs increases the risk of serotonin syndrome. Intervention Paroxetine is contraindicated in patients taking MAOIs, including MAOIs such as linezolid or intravenous methylene blue [see Dosage and Administration ( 2.5 ), Contraindications ( 4 ), Warnings and Precautions ( 5.2 )] . Examples selegiline, tranylcypromine, isocarboxazid, phenelzine, linezolid, methylene blue Pimozide and Thioridazine Clinical Impact Increased plasma concentrations of pimozide and thioridazine, drugs with a narrow therapeutic index, may increase the risk of QTc prolongation and ventricular arrhythmias. Intervention Paroxetine is contraindicated in patients taking pimozide or thioridazine [see Contraindications ( 4 )]. Other Serotonergic Drugs Clinical Impact The concomitant use of serotonergic drugs with paroxetine 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 paroxetine and/or concomitant serotonergic drugs [see Warnings and Precautions ( 5.2 )] . Examples other SSRIs, SNRIs, triptans, tricyclic antidepressants, opioids, lithium, tryptophan, buspirone, amphetamines, and St. John’s Wort Drugs that Interfere with Hemostasis (antiplatelet agents and anticoagulants) Clinical Impact The concurrent use of an antiplatelet agent or anticoagulant with paroxetine may potentiate the risk of bleeding. Intervention Inform patients of the increased risk of bleeding associated with the concomitant use of paroxetine and antiplatelet agents and anticoagulants. For patients taking warfarin, carefully monitor the international normalized ratio [see Warnings and Precautions ( 5.5 )] . Examples aspirin, clopidogrel, heparin, warfarin Drugs Highly Bound to Plasma Protein Clinical Impact Paroxetine is highly bound to plasma protein. The concomitant use of paroxetine with another drug that is highly bound to plasma protein may increase free concentrations of paroxetine or other tightly-bound drugs in plasma . Intervention Monitor for adverse reactions and reduce dosage of paroxetine or other protein-bound drugs as warranted. Examples warfarin Drugs Metabolized by CYP2D6 Clinical Impact Paroxetine is a CYP2D6 inhibitor [see Clinical Pharmacology ( 12.3 )]. The concomitant use of paroxetine with a CYP2D6 substrate may increase the exposure of the CYP2D6 substrate. Intervention Decrease the dosage of a CYP2D6 substrate if needed with concomitant paroxetine use. Conversely, an increase in dosage of a CYP2D6 substrate may be needed if paroxetine is discontinued. Examples propafenone, flecainide, atomoxetine, desipramine, dextromethorphan, metoprolol, nebivolol, perphenazine, tolterodine, venlafaxine, risperidone. Tamoxifen Clinical Impact Concomitant use of tamoxifen with paroxetine may lead to reduced plasma concentrations of the active metabolite (endoxifen) and reduced efficacy of tamoxifen Intervention Consider use of an alternative antidepressant with little or no CYP2D6 inhibition [see Warnings and Precautions ( 5.11 )]. Fosamprenavir/Ritonavir Clinical Impact Co-administration of fosamprenavir/ritonavir with paroxetine significantly decreased plasma levels of paroxetine. Intervention Any dose adjustment should be guided by clinical effect (tolerability and efficacy). Drugs Highly Bound to Plasma Protein : Monitor for adverse reactions and reduce dosage of paroxetine or other protein-bound drugs (e.g., warfarin) as warranted. ( 7 ) Drugs Metabolized by CYP2D6 : Reduce dosage of drugs metabolized by CYP2D6 as warranted. ( 7 ) Concomitant use with tamoxifen : Consider use of an alternative antidepressant with little or …

8 USE IN SPECIFIC POPULATIONS Pregnancy : SSRI use, particularly later in pregnancy, may increase the risk for persistent pulmonary hypertension and symptoms of poor adaptation (respiratory distress, temperature instability, feeding difficulty, hypotonia, irritability) in the neonate. ( 8.1 ) 8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to antidepressants, including paroxetine, during pregnancy. Healthcare providers are encouraged to advise patients to register by calling the National Pregnancy Registry for Antidepressants 1-866- 961-2388 or visiting online at https://womensmentalhealth.org/clinical-and-research-programs/pregnancyregistry/antidepressants/. Risk Summary Based on data from published observational studies, exposure to SSRIs, particularly in the month before delivery, has been associated with a less than 2-fold increase in the risk of postpartum hemorrhage [see Warnings and Precautions (5.5) and Clinical Considerations]. Paroxetine is associated with a less than 2-fold increase in cardiovascular malformations when administered to a pregnant woman during the first trimester. While individual epidemiological studies on the association between paroxetine use and cardiac malformations have reported inconsistent findings, some meta-analyses of epidemiological studies have identified an increased risk of cardiovascular malformations (see Data) . There are risks of persistent pulmonary hypertension of the newborn (PPHN) (see Data) and/or poor neonatal adaptation with exposure to selective serotonin reuptake inhibitors (SSRIs), including paroxetine during pregnancy. There also are risks associated with untreated depression in pregnancy (see Clinical Considerations) . For women who intend to become pregnant or who are in their first trimester of pregnancy, paroxetine should be initiated only after consideration of the other available treatment options. No evidence of treatment related malformations was observed in animal reproduction studies, when paroxetine was administered during the period of organogenesis at doses up to 50 mg/kg/day in rats and 6 mg/kg/day in rabbits. These doses are approximately 8 (rat) and less than 2 (rabbit) times the maximum recommended human dose (MRHD – 60 mg) on an mg/m 2 basis. When paroxetine was administered to female rats during the last trimester of gestation and continued through lactation, there was an increase in the number of pup deaths during the first four days of lactation. This effect occurred at a dose of 1 mg/kg/day which is less than the MRHD on an mg/m 2 basis (See Data) . The background risks of major birth defects and miscarriage for the indicated populations are unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively. Clinical Considerations Disease-associated maternal and/or embryofetal risk Women who discontinue antidepressants during pregnancy are more likely to experience a relapse of major depression than women who continue antidepressants. This finding is from a prospective, longitudinal study of 201 pregnant women with a history of major depressive disorder who were euthymic and taking antidepressants at the beginning of pregnancy. Consider the risk of untreated depression when discontinuing or changing treatment with antidepressant medication during pregnancy and the postpartum. Maternal Adverse Reactions Use of paroxetine in the month before delivery may be associated with an increased risk of postpartum hemorrhage [see Warnings and Precautions (5.5) ] . Fetal/Neonatal adverse reactions Neonates exposed to paroxetine and other SSRIs late in the third trimester have developed complications requiring prolonged hospitalization, respiratory support, and tube feeding. Su …

12.1 Mechanism of Action The mechanism of action of paroxetine in the treatment of MDD, SAD, OCD, PD, GAD, and PTSD is unknown, but is presumed to be linked to potentiation of serotonergic activity in the central nervous system resulting from inhibition of neuronal reuptake of serotonin (5-hydroxy-tryptamine, 5-HT).

11 DESCRIPTION Paroxetine hydrochloride is an SSRI. It is the hydrochloride salt of a phenylpiperidine compound identified chemically as (-)- trans -4 R -(4'-fluorophenyl)-3 S -[(3',4'-methylenedioxyphenoxy) methyl] piperidine hydrochloride hemihydrate and has the empirical formula of C 19 H 20 FNO 3 ·HCl·1/2H 2 O. The molecular weight is 374.8 (329.4 as free base). The structural formula of paroxetine hydrochloride is: Paroxetine hydrochloride is an odorless, off-white powder, having a melting point range of 120° to 138°C and a solubility of 5.4 mg/mL in water. Paroxetine Tablets, USP Paroxetine tablets, USP are for oral administration. Each film-coated tablet contains 10 mg, 20 mg, 30 mg, or 40 mg of paroxetine equivalent to 11.1 mg, 22.2 mg, 33.3 mg or 44.4 mg of paroxetine hydrochloride, respectively. Inactive ingredients consist of dibasic calcium phosphate dihydrate, hypromellose, magnesium stearate, polydextrose, polyethylene glycols, sodium starch glycolate, titanium dioxide and triacetin. The 10 mg tablet also contains: FD&C Yellow #6/Sunset Yellow FCF Aluminum Lake. The 20 mg tablet also contains: D&C Yellow #10 Aluminum Lake, yellow iron oxide and black iron oxide. The 40 mg tablet also contains: FD&C Yellow #6/Sunset Yellow FCF Aluminum Lake, FD&C Blue #2/Indigo Carmine Aluminum Lake and black iron oxide.

10 OVERDOSAGE The following have been reported with paroxetine tablet overdosage: Seizures, which may be delayed, and altered mental status including coma. Cardiovascular toxicity, which may be delayed, including QRS and QTc interval prolongation. Hypertension most commonly seen, but rarely can see hypotension alone or with co-ingestants including alcohol. Serotonin syndrome (patients with a multiple drug overdosage with other proserotonergic drugs may have a higher risk). Gastrointestinal decontamination with activated charcoal should be considered in patients who present early after a paroxetine overdose. Consider contacting a poison center (1-800-222-1222) or a medical toxicologist for additional overdosage management recommendations.

16 HOW SUPPLIED/STORAGE AND HANDLING Paroxetine Tablets USP, 10 mg are yellow colored film-coated modified capsule shaped, biconvex tablets debossed with ‘C 55’ on one side and a deep breakline on the other side. Bottles of 30 NDC 65862-154-30 Bottles of 90 NDC 65862-154-90 Bottles of 100 NDC 65862-154-01 Bottles of 500 NDC 65862-154-05 Bottles of 1,000 NDC 65862-154-99 Paroxetine Tablets USP, 20 mg are pink colored film-coated modified capsule shaped, biconvex tablets debossed with ‘56’ on one side and ‘C’ with a deep breakline on the other side. Bottles of 30 NDC 65862-155-30 Bottles of 90 NDC 65862-155-90 Bottles of 100 NDC 65862-155-01 Bottles of 500 NDC 65862-155-05 Bottles of 1,000 NDC 65862-155-99 Paroxetine Tablets USP, 30 mg are blue colored film-coated modified capsule shaped, biconvex tablets debossed with ‘F’ on one side and ‘12’ on the other side. Bottles of 30 NDC 65862-156-30 Bottles of 90 NDC 65862-156-90 Bottles of 100 NDC 65862-156-01 Bottles of 500 NDC 65862-156-05 Bottles of 1,000 NDC 65862-156-99 Paroxetine Tablets USP, 40 mg are pink colored film-coated modified capsule shaped, biconvex tablets debossed with ‘A 59’ on one side and plain on the other side. Bottles of 30 NDC 65862-157-30 Bottles of 90 NDC 65862-157-90 Bottles of 100 NDC 65862-157-01 Bottles of 500 NDC 65862-157-05 Bottles of 1,000 NDC 65862-157-99 Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature].