STEGLUJAN

1 INDICATIONS AND USAGE STEGLUJAN ® is indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus. Limitations of Use Not recommended for use to improve glycemic control in patients with type 1 diabetes mellitus [see Warnings and Precautions (5.1) ]. Has not been studied in patients with a history of pancreatitis. It is unknown whether patients with a history of pancreatitis are at increased risk for the development of pancreatitis while using STEGLUJAN [see Warnings and Precautions (5.2) ] . STEGLUJAN is a combination of ertugliflozin, a sodium glucose co-transporter 2 (SGLT2) inhibitor, and sitagliptin, a dipeptidyl peptidase-4 (DPP-4) inhibitor, is indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus. Limitations of Use: Not recommended for use to improve glycemic control in patients with type 1 diabetes mellitus. ( 1 ) Has not been studied in patients with a history of pancreatitis. ( 1 , 5.2 )

2 DOSAGE AND ADMINISTRATION Assess renal function before initiating and as clinically indicated. ( 2.1 ) Correct volume depletion before initiating. ( 2.1 ) Recommended starting dosage is 5 mg ertugliflozin/100 mg sitagliptin orally once daily, taken in the morning, with or without food. ( 2.2 ) Increase dosage to 15 mg ertugliflozin/100 mg sitagliptin orally once daily in those tolerating STEGLUJAN and needing additional glycemic control. ( 2.2 ) Use is not recommended in patients with an estimated glomerular filtration rate (eGFR) less than 45 mL/min/1.73 m 2 . ( 2.2 ) Withhold STEGLUJAN for at least 4 days, if possible, prior to surgery or procedures associated with prolonged fasting. ( 2.3 ) 2.1 Prior to Initiation of STEGLUJAN Assess renal function before initiating STEGLUJAN and as clinically indicated [see Warnings and Precautions (5.4) ] . Assess volume status. In patients with volume depletion, correct this condition before initiating STEGLUJAN [see Warnings and Precautions (5.5) and Use in Specific Populations (8.5 , 8.6) ]. 2.2 Recommended Dosage The recommended starting dosage of STEGLUJAN is 5 mg ertugliflozin/100 mg sitagliptin orally once daily, taken in the morning, with or without food. For patients treated with ertugliflozin who are being switched to STEGLUJAN, the dosage of ertugliflozin can be maintained. For additional glycemic control, the dosage may be increased to 15 mg ertugliflozin/100 mg sitagliptin orally once daily in patients tolerating STEGLUJAN. Use is not recommended in patients with an estimated glomerular filtration rate (eGFR) less than 45 mL/min/1.73 m 2 . Use of STEGLUJAN is contraindicated in patients with severe renal impairment (eGFR less than 30 mL/min/1.73 m 2 ), end-stage renal disease (ESRD) or on dialysis [see Contraindications (4) ] . 2.3 Temporary Interruption for Surgery Withhold STEGLUJAN for at least 4 days, if possible, prior to surgery or procedures associated with prolonged fasting. Resume STEGLUJAN when the patient is clinically stable and has resumed oral intake [see Warnings and Precautions (5.1) and Clinical Pharmacology (12.2) ].

5 WARNINGS AND PRECAUTIONS Diabetic Ketoacidosis in Patients with Type 1 Diabetes Mellitus and Other Ketoacidosis: Consider ketone monitoring in patients at risk for ketoacidosis, as indicated. Assess for ketoacidosis regardless of presenting blood glucose levels and discontinue STEGLUJAN if ketoacidosis is suspected. Monitor patients for resolution of ketoacidosis before restarting. ( 5.1 ) Pancreatitis: There have been postmarketing reports of acute pancreatitis in patients taking sitagliptin, including fatal and non-fatal hemorrhagic or necrotizing pancreatitis. If pancreatitis is suspected, promptly discontinue. ( 5.2 ) Lower Limb Amputation: Monitor patients for infections or ulcers of lower limbs, and discontinue if these occur. ( 5.3 ) Acute Renal Failure: There have been postmarketing reports of acute renal failure in patients taking sitagliptin, sometimes requiring dialysis. Monitor renal function. ( 5.4 ) Volume Depletion: May result in acute kidney injury. Before initiating, assess and correct volume status in patients with renal impairment, or low systolic blood pressure elderly patients, or patients on diuretics. Monitor for signs and symptoms during therapy. ( 5.5 ) Urosepsis and Pyelonephritis: Evaluate patients for signs and symptoms of urinary tract infections and treat promptly, if indicated. ( 5.6 ) Heart Failure: Heart failure has been observed with two other members of the DPP-4 inhibitor class. Consider risks and benefits in patients who have known risk factors for heart failure. Monitor patients for signs and symptoms. ( 5.7 ) Hypoglycemia: Consider a lower dose of insulin or insulin secretagogue to reduce risk of hypoglycemia when used in combination. ( 5.8 ) Necrotizing Fasciitis of the Perineum (Fournier’s Gangrene): Serious, life-threatening cases have occurred in both females and males. Assess patients presenting with pain or tenderness, erythema, or swelling in the genital or perineal area, along with fever or malaise. If suspected, institute prompt treatment. ( 5.9 ) Genital Mycotic Infections: Monitor and treat if indicated. ( 5.10 ) Hypersensitivity: There have been postmarketing reports of serious allergic and hypersensitivity reactions in patients treated with sitagliptin such as anaphylaxis, angioedema, and exfoliative skin conditions including Stevens-Johnson syndrome. In such cases, promptly discontinue, assess for other potential causes, institute appropriate monitoring and treatment, and initiate alternative treatment for diabetes. ( 5.11 ) Severe and Disabling Arthralgia: Severe and disabling arthralgia has been reported in patients taking DPP-4 inhibitors. Consider as a possible cause for severe joint pain and discontinue if appropriate. ( 5.12 ) Pemphigoid: There have been postmarketing reports of bullous pemphigoid requiring hospitalization in patients taking DPP-4 inhibitors. Tell patients to report development of blisters or erosions. If bullous pemphigoid is suspected, discontinue. ( 5.13 ) 5.1 Diabetic Ketoacidosis in Patients with Type 1 Diabetes Mellitus and Other Ketoacidosis In patients with type 1 diabetes mellitus, STEGLUJAN significantly increases the risk of diabetic ketoacidosis, a life-threatening event, beyond the background rate. In placebo-controlled trials of patients with type 1 diabetes mellitus, the risk of ketoacidosis was markedly increased in patients who received sodium glucose transporter 2 (SGLT2) inhibitors compared to patients who received placebo; this risk may be greater with higher doses. STEGLUJAN is not indicated for glycemic control in patients with type 1 diabetes mellitus. Type 2 diabetes mellitus and pancreatic disorders (e.g., history of pancreatitis or pancreatic surgery) are also risk factors for ketoacidosis. There have been postmarketing reports of fatal events of ketoacidosis in patients with type 2 diabetes mellitus using SGLT2 inhibitors. Precipitating conditions for diabetic ketoacidosis or other ketoacidosis include under-insulinization …

4 CONTRAINDICATIONS STEGLUJAN is contraindicated in patients with: Severe renal impairment (eGFR less than 30 mL/min/1.73 m 2 ), end-stage renal disease (ESRD), or on dialysis [see Warnings and Precautions (5.4) and Use in Specific Populations (8.6) ] . Hypersensitivity to sitagliptin, ertugliflozin, or any excipient, in STEGLUJAN. Reactions such as anaphylaxis or angioedema have occurred [see Warnings and Precautions (5.11) and Adverse Reactions (6.2) ]. Severe renal impairment (eGFR less than 30 mL/min/1.73 m 2 ), end-stage renal disease, or dialysis. ( 4 ) Hypersensitivity to sitagliptin, ertugliflozin, or any excipient in STEGLUJAN. ( 4 , 5.11 , 6.2 )

7 DRUG INTERACTIONS Table 3: Clinically Significant Drug Interactions with STEGLUJAN Insulin or Insulin Secretagogues Clinical Impact: The risk of hypoglycemia is increased when STEGLUJAN is used in combination with insulin or an insulin secretagogue. Intervention: A lower dose of insulin or insulin secretagogue may be required to minimize the risk of hypoglycemia when used in combination with STEGLUJAN. Lithium Clinical Impact: Concomitant use of an SGLT2 inhibitor with lithium may decrease serum lithium concentrations. Intervention: Monitor serum lithium concentration more frequently during STEGLUJAN initiation and dosage changes. Positive Urine Glucose Test Clinical Impact: SGLT2 inhibitors increase urinary glucose excretion and will lead to positive urine glucose tests. Intervention: Monitoring glycemic control with urine glucose tests is not recommended in patients taking SGLT2 inhibitors. Use alternative methods to monitor glycemic control. Interference with 1,5-anhydroglucitol (1,5-AG) Assay Clinical Impact: Measurements of 1,5-AG are unreliable in assessing glycemic control in patients taking SGLT2 inhibitors. Intervention: Monitoring glycemic control with 1,5-AG assay is not recommended. Use alternative methods to monitor glycemic control. See full prescribing information for information on drug interactions and interference of STEGLUJAN with laboratory tests. ( 7 )

8.1 Pregnancy Risk Summary Based on animal data showing adverse renal effects, from ertugliflozin, STEGLUJAN is not recommended during the second and third trimesters of pregnancy. The limited available data with ertugliflozin and sitagliptin use during pregnancy are not sufficient to determine a drug associated risk of adverse developmental outcomes. There are risks to the mother and fetus associated with poorly controlled diabetes in pregnancy (see Clinical Considerations ) . In animal studies, adverse renal changes were observed in rats when ertugliflozin was administered during a period of renal development corresponding to the late second and third trimesters of human pregnancy. Doses approximately 13 times the maximum clinical dose caused renal pelvic and tubule dilatations and renal mineralization that were not fully reversible. There was no evidence of fetal harm in rats or rabbits at exposures of ertugliflozin approximately 300 times higher than the maximal clinical dose of 15 mg/day when administered during organogenesis (see Data ) . In rats and rabbits, sitagliptin doses of 250 and 125 mg/kg, respectively (approximately 30 and 20 times the human exposure at the maximum recommended human dose) did not adversely affect development outcomes of either species. The estimated background risk of major birth defects is 6-10% in women with pre-gestational diabetes with a HbA1c >7 and has been reported to be as high as 20-25% in women with HbA1c >10. The estimated background risk of miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively.

6 ADVERSE REACTIONS The following important adverse reactions are described elsewhere in the labeling: Diabetic Ketoacidosis in Patients with Type 1 Diabetes and Other Ketoacidosis [see Warnings and Precautions (5.1) ] Pancreatitis [see Warnings and Precautions (5.2) ] Lower Limb Amputation [see Warnings and Precautions (5.3) ] Acute Renal Failure [see Warnings and Precautions (5.4) ] Volume Depletion [see Warnings and Precautions (5.5) ] Urosepsis and Pyelonephritis [see Warnings and Precautions (5.6) ] Heart Failure [see Warnings and Precautions (5.7) ] Hypoglycemia with Concomitant Use with Insulin or Insulin Secretagogues [see Warnings and Precautions (5.8) ] Necrotizing Fasciitis of the Perineum (Fournier's Gangrene) [see Warnings and Precautions (5.9) ] Genital Mycotic Infections [see Warnings and Precautions (5.10) ] Hypersensitivity Reactions [see Warnings and Precautions (5.11) ] Severe and Disabling Arthralgia [see Warnings and Precautions (5.12) ] Bullous Pemphigoid [see Warnings and Precautions (5.13) ] Most common adverse reactions associated with ertugliflozin (incidence ≥5%): female genital mycotic infections. ( 6.1 ) Most common adverse reactions associated with sitagliptin (incidence ≥5%): upper respiratory tract infection, nasopharyngitis and headache. In the add-on to sulfonylurea and add-on to insulin studies, hypoglycemia was also more commonly reported in patients treated with sitagliptin compared to placebo. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Merck Sharp & Dohme LLC at 1-877-888-4231 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. Ertugliflozin and Sitagliptin The safety of concomitantly administered ertugliflozin and sitagliptin has been evaluated in 990 patients with type 2 diabetes mellitus treated for 26 weeks in three studies; a factorial study of ertugliflozin 5 mg or 15 mg in combination with sitagliptin 100 mg once daily compared to the individual components, a placebo-controlled study of ertugliflozin 5 mg or 15 mg as add-on therapy to sitagliptin 100 mg and metformin HCl once daily, and a placebo-controlled study of initial therapy with ertugliflozin 5 mg or 15 mg once daily in combination with sitagliptin 100 mg once daily [see Clinical Studies (14) ] . The incidence and type of adverse reactions in these three studies were similar to the adverse reactions seen with ertugliflozin and described below in Table 1 . Ertugliflozin Pool of Placebo-Controlled Trials The data in Table 1 are derived from a pool of three 26-week, placebo-controlled trials. Ertugliflozin was used as monotherapy in one trial and as add-on therapy in two trials [see Clinical Studies (14) ] . These data reflect exposure of 1,029 patients to ertugliflozin with a mean exposure duration of approximately 25 weeks. Patients received ertugliflozin 5 mg (N=519), ertugliflozin 15 mg (N=510), or placebo (N=515) once daily. The mean age of the population was 57 years and 2% were older than 75 years of age. Fifty-three percent (53%) of the population was male and 73% were White, 15% were Asian, and 7% were Black or African American. At baseline the population had diabetes for an average of 7.5 years, had a mean HbA1c of 8.1%, and 19.4% had established microvascular complications of diabetes. Baseline renal function (mean eGFR 88.9 mL/min/1.73 m 2 ) was normal or mildly impaired in 97% of patients and moderately impaired in 3% of patients. Table 1 shows common adverse reactions associated with the use of ertugliflozin. These adverse reactions were not present at baseline, occurred more commonly on ertugliflozin than on placebo, and occurred in at least 2% of patients treated with either ertugliflozin 5 mg or ertugliflozin 1…