Rolapitant

1 INDICATIONS AND USAGE VARUBI ® is indicated in combination with other antiemetic agents in adults for the prevention of delayed nausea and vomiting associated with initial and repeat courses of emetogenic cancer chemotherapy, including, but not limited to, highly emetogenic chemotherapy. VARUBI is a substance P/neurokinin 1 (NK1) receptor antagonist indicated in combination with other antiemetic agents in adults for the prevention of delayed nausea and vomiting associated with initial and repeat courses of emetogenic cancer chemotherapy, including, but not limited to, highly emetogenic chemotherapy. ( 1 )

2 DOSAGE AND ADMINISTRATION The recommended dosage of VARUBI in adults in combination with a 5-HT 3 receptor antagonist and dexamethasone for the prevention of nausea and vomiting with emetogenic cancer chemotherapy is shown in Table 1 . There is no drug interaction between rolapitant and dexamethasone, so no dosage adjustment for dexamethasone is required. Administer a dexamethasone dose of 20 mg on Day 1 [see Clinical Pharmacology (12.3) ] . Administer VARUBI prior to the initiation of each chemotherapy cycle, but at no less than 2 week intervals. Administer VARUBI without regards to meals. Table 1: Recommended Dosing Regimen of VARUBI Day 1 Day 2 Day 3 Day 4 Prevention of Nausea and Vomiting Associated with Cisplatin-Based Highly Emetogenic Cancer Chemotherapy VARUBI 180 mg as a single dose orally within 2 hours prior to initiation of chemotherapy None Dexamethasone 20 mg; 30 min prior to initiation of chemotherapy 8 mg twice daily 8 mg twice daily 8 mg twice daily 5-HT 3 receptor antagonist See the prescribing information for the co-administered 5-HT 3 receptor antagonist for appropriate dosing information. None Prevention of Nausea and Vomiting Associated with Moderately Emetogenic Cancer Chemotherapy and Combinations of Anthracycline and Cyclophosphamide VARUBI 180 mg as a single dose orally within 2 hours prior to initiation of chemotherapy None Dexamethasone 20 mg; 30 min prior to initiation of chemotherapy None 5-HT 3 receptor antagonist See the prescribing information for the co-administered 5-HT 3 receptor antagonist for appropriate dosing information. See the prescribing information for the co-administered 5-HT 3 receptor antagonist for appropriate dosing information. Administer in combination with dexamethasone and a 5-HT 3 receptor antagonist; see full prescribing information for dosing information. ( 2 ) No dosage adjustment for dexamethasone is required. ( 2 ) The recommended dosage of VARUBI is 180 mg as a single dose orally within 2 hours prior to the initiation of chemotherapy on Day 1. ( 2 ) Administer VARUBI prior to the initiation of each chemotherapy cycle, but at no less than 2 week intervals. ( 2 ) Administer VARUBI without regards to meals. ( 2 )

6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the labeling: Interaction with CYP2D6 Substrates [see Contraindications (4) , Warnings and Precautions (5.1) ] Most common adverse reactions (≥3%) are: Cisplatin Based Highly Emetogenic Chemotherapy: neutropenia, hiccups and abdominal pain. ( 6.1 ) Moderately Emetogenic Chemotherapy and Combinations of Anthracycline and Cyclophosphamide: decreased appetite, neutropenia, dizziness, dyspepsia, urinary tract infection, stomatitis and anemia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact TerSera Therapeutics at 1-844-334-4035 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 clinical practice. In 4 controlled clinical trials in patients receiving emetogenic cancer chemotherapy, VARUBI was given in combination with a 5-HT 3 receptor antagonist and dexamethasone. On Day 1 of Cycle 1 of chemotherapy, 1567 patients were treated with VARUBI and 1198 of these patients continued into the optional multiple cycle extension for up to 6 cycles of chemotherapy. The median number of cycles administered 180 mg of VARUBI was four. VARUBI 180 mg was administered to 1294 patients. In Cycle 1 adverse reactions were reported in approximately 7% of patients treated with VARUBI compared with approximately 6% of patients treated with control therapy. The most common adverse reactions reported with an incidence of ≥3% and greater than control are listed in Table 2 and Table 3 . Table 2: Most Common Adverse Reactions in Patients Receiving Cisplatin-Based Highly Emetogenic Chemotherapy (Cycle 1)* * all reactions occurring at ≥3% in the VARUBI group and for which the rate for VARUBI exceeds the rate for control VARUBI Regimen (VARUBI, Dexamethasone, and 5-HT 3 Receptor Antagonist) N = 624 Control (Placebo, Dexamethasone, and 5-HT 3 Receptor Antagonist) N = 627 Neutropenia 9% 8% Hiccups 5% 4% Abdominal Pain 3% 2% Table 3: Most Common Adverse Reactions in Patients Receiving Moderately Emetogenic Chemotherapy and Combinations of Anthracycline and Cyclophosphamide (Cycle 1)* *all reactions occurring at ≥3% in the VARUBI group and for which the rate for VARUBI exceeds the rate for control. VARUBI Regimen (VARUBI, Dexamethasone, and 5-HT 3 Receptor Antagonist) N = 670 Control (Placebo, Dexamethasone, and 5-HT 3 Receptor Antagonist) N = 674 Decreased appetite 9% 7% Neutropenia 7% 6% Dizziness 6% 4% Dyspepsia 4% 2% Urinary tract infection 4% 3% Stomatitis 4% 2% Anemia 3% 2% Adverse reactions in the multiple-cycle extensions of highly and moderately emetogenic chemotherapy studies for up to 6 cycles of chemotherapy were generally similar to that observed in Cycle 1.

12.3 Pharmacokinetics Absorption Following a single oral dose administration of 180 mg VARUBI under fasting conditions to healthy subjects, rolapitant was measurable in plasma within 30 minutes and the peak plasma concentration (C max ) for rolapitant which was reached in about 4 hours and mean C max was 968 ng/mL (%CV:28%). Following multiple oral doses of 9 to 45 mg once daily of rolapitant (5% to 25% of the recommended dose) for 10 days, accumulation of rolapitant (ratio of AUC 0-24hr ) ranged from 5.0 to 5.3 fold. The systemic exposures (C max and AUC) to rolapitant increased in a dose-proportional manner when single oral doses of rolapitant increased from 4.5 mg to 180 mg. With 4 times the recommended clinical oral dose of 180 mg, the C max and AUC of rolapitant increased 3.1 fold and 3.7 fold, respectively. Concomitant administration of a high-fat meal did not significantly affect the pharmacokinetics of rolapitant after administration of 180 mg VARUBI [see Dosage and Administration (2) ] . Distribution Rolapitant was highly protein bound to human plasma (99.8%). The apparent volume of distribution (Vd/F) following a single oral dose of 180 mg rolapitant was 460 L in healthy subjects. The large Vd indicated an extensive tissue distribution of rolapitant. In a population pharmacokinetic analysis of oral rolapitant, the Vd/F was 387 L in cancer patients. Elimination Following single oral doses (4.5 to 180 mg) of rolapitant, the mean terminal half-life (t 1/2 ) of rolapitant ranged from 169 to 183 hours (approximately 7 days), and was independent of dose. In a population pharmacokinetic analysis, the apparent total clearance (CL/F) of oral rolapitant was 0.96 L/hour in cancer patients. Metabolism Rolapitant is metabolized primarily by CYP3A4 to form a major active metabolite, M19 (C4-pyrrolidine-hydroxylated rolapitant). In a mass balance study, the metabolite M19 was determined to be the major circulating metabolite. The rate of formation of M19 was relatively slow, resulting in the delayed median T max of 120 hours (range: 24 to 168 hours) with C max of 183 ng/mL. The mean half-life of M19 was 158 hours. The exposure ratio of M19 to rolapitant was approximately 50% in plasma. Excretion Rolapitant is eliminated primarily through the hepato/biliary route. Following administration of a single oral 180-mg dose of [ 14 C]-rolapitant, on average 14.2% (range 9% to 20%) and 73% (range 52% to 89%) of the dose was recovered in the urine and feces, respectively over 6 weeks. In pooled samples collected over 2 weeks, 8.3% of the dose was recovered in the urine primarily as metabolites and 37.8% of the dose was recovered in the feces primarily as unchanged rolapitant. Unchanged rolapitant or M19 was not found in pooled urine sample. Specific Populations Age, Male and Female Patients and Racial or Ethnic Groups Population pharmacokinetic analyses indicated that age, sex and race had no significant impact on the pharmacokinetics of rolapitant. Patients with Hepatic Impairment Following administration of a single oral dose of 180 mg rolapitant to patients with mild hepatic impairment (Child-Pugh Class A), the pharmacokinetics of rolapitant were comparable with those of healthy subjects. In patients with moderate hepatic impairment (Child-Pugh Class B), the mean C max was 25% lower while mean AUC of rolapitant was similar compared to those of healthy subjects. The median T max for M19 was delayed to 204 hours in patients with mild or moderate hepatic impairment compared to 168 hours in healthy subjects. The pharmacokinetics of rolapitant were not studied in patients with severe hepatic impairment (Child-Pugh Class C) [see Use in Specific Populations (8.6) ] . Patients with Renal Impairment In population pharmacokinetic analyses, rolapitant pharmacokinetics in cancer patients with mild (CLcr: 60 to 90 mL/min) or moderate (CLcr: 30 to 60 mL/min) renal impairment was comparable to cancer patients with normal kidney function. Information is insufficient for the effect of severe renal impairment. The pharmacokinetics of rolapitant was not studied in patients with end-stage renal disease requiring hemodialysis. Drug Interaction Studies Effect of Other Drugs on Rolapitant Rolapitant is a substrate for CYP3A4. CYP3A4 inducers When 600 mg rifampin was administered once daily for 7 days before and 7 days after administration of a single oral dose of 180 mg rolapitant, the mean C max of rolapitant was reduced by 30% and the mean AUC was reduced by 85% compared to administration of rolapitant alone. The mean half-life of rolapitant decreased from 176 hours without rifampin to 41 hours with concurrent rifampin [see Drug Interactions (7) ] . CYP3A4 inhibitors Concurrent administration of 400 mg ketoconazole, a strong CYP3A4 inhibitor, once daily for 21 days following a single 90 mg oral dose of rolapitant, did not affect the C max of rolapitant while the AUC increased by 21%. These pharmacokinetic differences are not clinically significant. Effect of Rolapitant on Other Drugs The effect of VARUBI on CYP450 enzymes and transporters is summarized below. CYP3A4 substrates Rolapitant is neither an inhibitor nor an inducer of CYP3A4. Midazolam: A single oral dose of 180 mg rolapitant had no significant effects on the pharmacokinetics of midazolam when oral midazolam 3 mg was co-administered on Day 1 and administered alone on Days 6 and 9. Ondansetron: Rolapitant had no significant effects on the pharmacokinetics of intravenous ondansetron when concomitantly administered with a single 180 mg oral dose of rolapitant on the same day. Dexamethasone: Rolapitant had no significant effects on the pharmacokinetics of dexamethasone when oral dexamethasone was administered on Days 1 to 3 after a single 180 mg oral dose of rolapitant was co-administered on Day 1 [see Dosage and Administration (2) ] . CYP2D6 substrates Rolapitant is a moderate inhibitor of CYP2D6 [see Contraindications (4) , Warnings and Precautions (5.1) , and Drug Interactions (7) ] . Following a single dose of oral rolapitant, the AUC of dextromethorphan (CYP2D6 substrate) increased 2.6-fold on Day 1 and 3.3-fold on Day 8 and was similar to that following a single dose of intravenous rolapitant (VARUBI is not approved for intravenous use). Following intravenous rolapitant, inhibition of CYP2D6 continued with approximately a 3-fold increase in the AUC of dextromethorphan on Days 15 and 22 and attenuated to a 2.3-fold increase from Day 22 to Day 28, the last time point measured. See Table 6 for the summary of effects of oral and intravenous rolapitant on dextromethorphan. Table 6: Effect of Oral and Intravenous Rolapitant on the Systemic Exposure of Co-Administered CYP2D6 Substrate (Dextromethorphan) a A single oral dose of 180 mg rolapitant was administered on Day 1; the interacting drug (dextromethorphan 30 mg) was administered orally on Day 1 with rolapitant and alone on Day 8. b A single intravenous dose of 166.5 mg rolapitant was administered on Day 1; the interacting drug (dextromethorphan 30 mg) was administered orally on Day 1 with rolapitant and alone on Days 8, 15, 22, and 29. VARUBI is not approved for intravenous use. The AUC of rolapitant following single intravenous dose of 166.5 mg is similar to that following single oral dose of VARUBI 180 mg. ↑ Denotes a mean increase in exposure by the percentage indicated. N/A: not applicable Rolapitant Dose (route of administration) % Change for Dextromethorphan Day 1 with Rolapitant Day 8 without Rolapitant Day 15 without Rolapitant Day 22 without Rolapitant Day 29 without Rolapitant Change in C max Change in AUC Change in C max Change in AUC Change in C max Change in AUC Change in C max Change in AUC Change in C max Change in AUC 180 mg a (Oral) 120% ↑ 160% ↑ 180% ↑ 230% ↑ N/A 166.5 mg b (Intavenous) 75% ↑ 110% ↑ 140% ↑ 220% ↑ 170% ↑ 220% ↑ 120% ↑ 180% ↑ 96% ↑ 130% ↑ BCRP Transporter In vitro , rolapitant is a BCRP transporter inhibitor. When sulfasalazine (BCRP substrate) was administered with a single oral dose of 180 mg rolapitant on Day 1 and without rolapitant on Day 8, a 140% increase in C max and a 130% increase in AUC of sulfasalazine 500 mg was observed on Day 1, a 17% increase in C max and a 32% increase in AUC was observed on Day 8 [see Drug Interactions (7) ] . P-glycoprotein substrates In vitro , rolapitant is a P-gp inhibitor. When digoxin (P-gp substrate) was administered with a single oral dose of 180 mg rolapitant, a 70% increase in C max and a 30% increase in AUC of digoxin 0.5 mg were observed [see Drug Interactions (7) ] . Warfarin When warfarin was administered with a single intravenous dose of 166.5 mg rolapitant, 3% and 18% increases in C max and AUC of S-warfarin were observed on Day 1, respectively. On Day 8, the increases were 3% for C max and 21% for AUC. The effect on INR or prothrombin time was not measured. Of note, C max was greater with intravenous rolapitant when compared to oral VARUBI [see Drug Interactions (7) ] . Substrates for other CYP enzymes In vitro studies suggest that rolapitant is not an inhibitor of CYP1A2 and CYP2E1. In vitro studies suggest that rolapitant inhibits CYP2A6; however, a clinically meaningful drug interaction via an inhibition of CYP2A6 appears unlikely. No clinically significant interaction was seen on the systemic exposures of the following drugs when administered with a single oral dose of 180 mg rolapitant on Day 1: repaglinide (CYP2C8 substrate; no effect on repaglinide 0.25 mg on Day 1; on Day 8: 29% and 24% increase in C max and AUC, respectively), efavirenz (CYP2B6 substrate; 18% decrease in C max and no effect on AUC of efavirenz 600 mg on Day 1; on Day 8: no effect on C max and 28% increase in AUC), tolbutamide (CYP2C9 substrate; no effect on tolbutamide 500 mg on Day 1 and on Day 8), or omeprazole (CYP2C19 substrate; 44% increase in C max and 23% increase in AUC of omeprazole 40 mg on Day 1; on Day 8: 37% and 15% increase in C max and AUC, respectively). Substrates for other transporters In vitro studies suggest that oral rolapitant is unlikely to inhibit organic anion transporting polypeptides 1B1 and 1B3 (OATP1B1 and OATP1B3), organic anion transporters 1 and 3 (OAT1 and OAT3), organic cation transporter 2 (OCT2), and multidrug and toxin extrusion proteins 1 and 2K (MATE1 and MATE2K) in vivo .