Amisulpride

1 INDICATIONS AND USAGE BARHEMSYS ® is indicated in adults for: prevention of postoperative nausea and vomiting (PONV), either alone or in combination with an antiemetic of a different class. treatment of PONV in patients who have received antiemetic prophylaxis with an agent of a different class or have not received prophylaxis. BARHEMSYS is a dopamine-2 (D 2 ) antagonist indicated in adults for: Prevention of postoperative nausea and vomiting (PONV), either alone or in combination with an antiemetic of a different class. ( 1 ) Treatment of PONV in patients who have received antiemetic prophylaxis with an agent of a different class or have not received prophylaxis. ( 1 )

2 DOSAGE AND ADMINISTRATION The recommended dosage of BARHEMSYS: Prevention of PONV, either alone or in combination with another antiemetic : 5 mg as a single intravenous dose infused over 1 to 2 minutes at the time of induction of anesthesia. ( 2.1 ) Treatment of PONV : 10 mg as a single intravenous dose infused over 1 to 2 minutes in the event of nausea and/or vomiting after a surgical procedure. ( 2.1 ) See full prescribing information for preparation and administration instructions . ( 2.2 ) 2.1 Recommended Dosage The recommended adult dosage of BARHEMSYS and infusion rate by indication is shown in the table below: Indication Adult Dosage Regimen Prevention of PONV 5 mg as a single intravenous injection infused over 1 to 2 minutes at the time of induction of anesthesia [see Dosage and Administration (2.2) ] . Treatment of PONV 10 mg as a single intravenous injection infused over 1 to 2 minutes in the event of nausea and/or vomiting after a surgical procedure [see Dosage and Administration (2.2) ] . 2.2 Preparation and Administration Dilution of BARHEMSYS is not required before administration. BARHEMSYS is chemically and physically compatible with Water for Injection, 5% Dextrose Injection, 0.9% Sodium Chloride Injection, and Lactated Ringer's Solution (also known as Ringer's Lactate Solution, Compound Sodium Lactate Solution, and Hartmann's Solution), any of which may be used to flush an intravenous line before or after administration of BARHEMSYS. Protect from light. BARHEMSYS is subject to photodegradation. Administer BARHEMSYS within 12 hours of removal of the vial from the protective carton. Prior to administration, inspect the BARHEMSYS solution visually for particulate matter and discoloration. Discard if particulate matter or discoloration is observed.

6 ADVERSE REACTIONS Most common adverse reactions (≥ 2%) are: Prevention of PONV : increased blood prolactin concentrations, chills, hypokalemia, procedural hypotension, and abdominal distension. ( 6.1 ) Treatment of PONV : infusion site pain. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Acacia Pharma at 1-877-357-9237 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 data described below reflect exposure to BARHEMSYS in 1,166 patients treated in placebo-controlled trials. 748 of these patients received a dose of 5 mg for prevention of PONV (of whom 572 received another antiemetic concomitantly) and 418 patients received 10 mg for treatment of PONV [see Clinical Studies (14.1 , 14.2) ] . The mean age of the population was 49 years (range 18 to 91 years), 87% female, 80% White/Caucasian, 9% Black, and 1% Asian. Prevention of PONV Common adverse reactions reported in at least 2% of adult patients who received BARHEMSYS 5 mg and at a higher rate than placebo in Studies 1 and 2 for the prevention of PONV are shown in Table 1. Table 1. Common Adverse Reactions Reported in at least 2% of patients treated with BARHEMSYS and at a higher rate than placebo in Adult Patients in Studies 1 and 2 of BARHEMSYS for Prevention of PONV BARHEMSYS 5 mg Placebo N=748 N=741 Chills 4% 3% Hypokalemia 4% 2% Procedural hypotension 3% 2% Abdominal distension 2% 1% Serum prolactin concentrations were measured in Study 1 where 5% (9/176) of BARHEMSYS-treated patients vs 1% (1/166) of placebo-treated patients had increased blood prolactin reported as an adverse reaction. Serum prolactin concentrations increased from a mean of 10 ng/mL at baseline to 32 ng/mL after BARHEMSYS treatment in 112 females (upper limit of normal 29 ng/mL) and from 10 ng/mL to 19 ng/mL in 61 males (upper limit of normal 18 ng/mL). No clinical consequences due to elevated prolactin levels were reported. Treatment of PONV The most common adverse reaction, reported in at least 2% of adult patients who received BARHEMSYS 10 mg (N=418) and at a higher rate than placebo (N=416), in clinical trials for the treatment of PONV (Studies 3 and 4) was infusion site pain (BARHEMSYS 6%; placebo 4%). 6.2 Postmarketing Experience The following adverse reactions have been identified during post-approval chronic oral use of amisulpride outside of the United States (BARHEMSYS is not approved for oral dosing or chronic use). Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Blood and lymphatic system disorders : agranulocytosis Cardiac disorders : bradycardia, torsades de pointes, ventricular tachycardia, prolonged QT by electrocardiogram General disorders : neuroleptic malignant syndrome Immune system disorders : angioedema, hypersensitivity, urticaria Hepatic disorders : increased hepatic enzymes Nervous system disorders : agitation, anxiety, dystonia, extrapyramidal disorder, seizure Psychiatric disorders : confusional state, insomnia, somnolence Vascular disorders : hypotension

12.3 Pharmacokinetics After an intravenous infusion, the peak plasma concentration of amisulpride is achieved at the end of the infusion period and the plasma concentration decreases to about 50% of the peak value within approximately 15 minutes. The AUC (0-∞) increases dose-proportionally in the dose range from 5 mg to 40 mg (4-times the maximum recommended dose). The following mean pharmacokinetic parameters of amisulpride were observed following a single 5 or 10 mg intravenous dose in adult healthy subjects and surgical patients. Table 2. Summary of Key Pharmacokinetic Parameters of Amisulpride from Clinical Studies Single Dose Infusion Duration (minutes) Number of Subjects Mean (SD) Peak Plasma Concentration (ng/mL) AUC (0-∞) (ng∙h/mL) Healthy Subjects 5 mg 2 39 200 (139) 154 (30) Healthy Subjects 10 mg 1 29 451 (230) 136 (28) AUC (0-2 hr) Patients 5 mg 1 to 2 26 Patients in a clinical trial for prophylaxis of PONV 161 (58) 260 (65) 27 Patients in clinical trials for treatment of PONV 127 (64) 204 (94) Patients 10 mg 1 to 2 31 285 (446) 401 (149) Distribution Following intravenous infusion, the mean volume of distribution of amisulpride is estimated to be 127 to 144 L in surgical patients and 171 L in healthy subjects. Amisulpride distributes into erythrocytes. Plasma protein binding is 25% to 30% in the concentration range from 37 to 1850 ng/mL. Elimination The mean elimination half-life is approximately 4 to 5 hours and similar between healthy subjects and surgical patients. Population pharmacokinetic analysis estimated that the plasma clearance of amisulpride is 20.6 L/h in surgical patients and 24.1 L/h in healthy subjects. Metabolism In a mass balance study, no metabolites were detectable in plasma while four metabolites were identified in urine and feces. Each metabolite accounts for less than 7% of the dose. In vitro amisulpride is not metabolized by major cytochrome P450 enzymes. Excretion After intravenous administration of amisulpride, 74% and 23% of the administered dose was recovered in urine and feces, respectively. 58% and 20% of the dose was excreted as unchanged amisulpride in urine and feces, respectively. Renal clearance was estimated to be 20.5 L/hr (342 mL/min) in healthy subjects suggesting that amisulpride undergoes active renal secretion. Specific Populations Age, Sex, and Racial Groups No clinically significant effect on the pharmacokinetics of amisulpride was observed based on age (18 to 90 years), sex, or race. Patients with Renal Impairment In subjects with severe renal impairment (eGFR < 30 mL/min/1.73 m 2 ) and no requirement for dialysis, the C max of amisulpride after a single 10 mg intravenous dose was not greater than that in healthy subjects with normal renal function, and the AUC (0-∞) was approximately twice as high. In surgical patients with mild or moderate renal impairment (eGFR 30 to 89 mL/min/1.73 m 2 ), the C max of amisulpride following a single 5 mg or 10 mg intravenous dose was not significantly different and the AUC (0-∞) of amisulpride increased about 1.3-fold compared to patients with normal renal function. The changes in the pharmacokinetics of amisulpride following a single 5 mg or 10 mg intravenous dose in subjects or patients with mild, moderate, or severe renal impairment compared to subjects or patients with normal renal function are not considered to be clinically meaningful. Drug Interaction Studies No clinical drug interaction trials have been conducted with BARHEMSYS. In Vitro Studies Cytochrome P450-Related Metabolism In vitro , amisulpride did not inhibit CYP1A2, CYP2A6, CYP2B6, CYP2C9, CYP2C19, CYP2D6, or CYP3A4, or induce CYP1A2, CYP2C9, CYP2C19, or CYP3A4. In vitro , amisulpride was not a substrate of CYP1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1 and CYP3A4. Transporters Amisulpride inhibits MATE1 and MATE2-K transporters. Amisulpride does not inhibit P-gp, BCRP, OCT1, OCT2, OAT1, OAT3, OATP1B1, OATP1B3 at therapeutic concentrations. Amisulpride is a substrate for P-gp, BCRP, OCT1, MATE1 and MATE2-K, but not a substrate for OATP1B1, OATP1B3, OAT1, OAT3 and OCT2.