STEGLUJAN

Dosage and Administration ( 2.4 ) 06/2026 Warnings and Precautions ( 5.6 ) 06/2026

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) ]. 2.4 Recommendations Regarding Missed Dose If a dose is missed, instruct patients to take the dose as soon as possible. Advise patients not to double up the next dose.

3 DOSAGE FORMS AND STRENGTHS STEGLUJAN 5 mg/100 mg tablets: contain ertugliflozin 5 mg and sitagliptin 100 mg and are beige, almond-shaped debossed with "554" on one side and plain on the other side. STEGLUJAN 15 mg/100 mg tablets: contain ertugliflozin 15 mg and sitagliptin 100 mg and are brown, almond-shaped debossed with "555" on one side and plain on the other side. Tablets: Ertugliflozin 5 mg and sitagliptin 100 mg ( 3 ) Ertugliflozin 15 mg and sitagliptin 100 mg ( 3 )

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 (5.9) 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 , 5.9 , 6.2 )

6 ADVERSE REACTIONS The following important adverse reactions are described elsewhere in the labeling: Diabetic Ketoacidosis in Patients with Type 1 Diabetes Mellitus 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) ] Genitourinary Infections, including Urosepsis, Pyelonephritis, Necrotizing Fasciitis of the Perineum (Fournier’s Gangrene), and Genital Mycotic Infections [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) ] Hypersensitivity Reactions [see Warnings and Precautions (5.9) ] Severe and Disabling Arthralgia [see Warnings and Precautions (5.10) ] Bullous Pemphigoid [see Warnings and Precautions (5.11) ] 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 15 mg. Table 1: Adverse Reactio …

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 USE IN SPECIFIC POPULATIONS Pregnancy: Advise females of the potential risk to a fetus especially during the second and third trimesters. ( 8.1 ) Lactation: Breastfeeding not recommended. ( 8.2 ) Geriatrics: Higher incidence of adverse reactions related to reduced intravascular volume. ( 8.5 ) Renal Impairment: Higher incidence of adverse reactions related to reduced intravascular volume and renal function. ( 8.6 ) 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. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risk Poorly controlled diabetes in pregnancy increases the maternal risk for diabetic ketoacidosis, pre-eclampsia, spontaneous abortions, preterm delivery, and delivery complications. Poorly controlled diabetes increases the fetal risk for major birth defects, stillbirth, and macrosomia related morbidity. Data Animal Data Ertugliflozin When ertugliflozin was orally administered to juvenile rats from PND 21 to PND 90, increased kidney weight, renal tubule and renal pelvis dilatation, and renal mineralization occurred at doses greater than or equal to 5 mg/kg (13-fold human exposures, based on AUC). These effects occurred with drug exposure during periods of renal development in rats that correspond to the late second and third trimester of human renal development, and did not fully reverse within a 1-month recovery period. In embryo-fetal development studies, ertugliflozin (50, 100 and 250 mg/kg/day) was administered orally to rats on gestation days 6 to 17 and to rabbits on gestation days 7 to 19. Ertugliflozin did not adversely affect developmental outcomes in rats and rabbits at maternal exposures that were approximately 300 times the human exposure at the maximum clinical dose of 15 mg/day, based on AUC. A maternally toxic dose (250 mg/kg/day) in rats (707 times the clinical dose) was associated with reduced fetal viability, and a higher incidence of a visceral malformation (membranous ventricular septal defect). In the pre- and post-natal development study in pregnant rats, ertugliflozin was administered to the dams from gestation day 6 through lactation day 21 (weaning). Decreased post-natal growth (weight gain) was observed at maternal doses ≥100 mg/kg/day (greater than or equal to 331 times the human exposure at the maximum clinical do …

12.1 Mechanism of Action STEGLUJAN STEGLUJAN combines two antihyperglycemic agents with complementary mechanisms of action to improve glycemic control in patients with type 2 diabetes mellitus: ertugliflozin, a SGLT2 inhibitor, and sitagliptin, a DPP-4 inhibitor. Ertugliflozin SGLT2 is the predominant transporter responsible for reabsorption of glucose from the glomerular filtrate back into the circulation. Ertugliflozin is an inhibitor of SGLT2. By inhibiting SGLT2, ertugliflozin reduces renal reabsorption of filtered glucose and lowers the renal threshold for glucose, and thereby increases urinary glucose excretion. Sitagliptin Sitagliptin is a DPP-4 inhibitor, which is believed to exert its actions in patients with type 2 diabetes mellitus by slowing the inactivation of incretin hormones. Concentrations of the active intact hormones are increased by sitagliptin, thereby increasing and prolonging the action of these hormones. Incretin hormones, including glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), are released by the intestine throughout the day, and levels are increased in response to a meal. These hormones are rapidly inactivated by the enzyme, DPP-4. The incretins are part of an endogenous system involved in the physiologic regulation of glucose homeostasis. When blood glucose concentrations are normal or elevated, GLP-1 and GIP increase insulin synthesis and release from pancreatic beta cells by intracellular signaling pathways involving cyclic AMP. GLP-1 also lowers glucagon secretion from pancreatic alpha cells, leading to reduced hepatic glucose production. By increasing and prolonging active incretin levels, sitagliptin increases insulin release and decreases glucagon levels in the circulation in a glucose-dependent manner. Sitagliptin demonstrates selectivity for DPP-4 and does not inhibit DPP-8 or DPP-9 activity in vitro at concentrations approximating those from therapeutic doses.

11 DESCRIPTION STEGLUJAN (ertugliflozin and sitagliptin) tablet for oral use contains ertugliflozin L-pyroglutamic acid, a SGLT2 inhibitor, and sitagliptin phosphate, a DPP-4 inhibitor. Ertugliflozin The chemical name of ertugliflozin L-pyroglutamic acid is (1 S ,2 S ,3 S ,4 R ,5 S )-5-(4-chloro-3-(4-ethoxybenzyl)phenyl)-1-(hydroxymethyl)-6,8-dioxabicyclo[3.2.1]octane-2,3,4-triol, compound with (2 S )-5-oxopyrrolidine-2-carboxylic acid. The molecular formula is C 27 H 32 ClNO 10 and the molecular weight is 566.00. The chemical structure is: Ertugliflozin L-pyroglutamic acid is a white to off-white powder that is soluble in ethyl alcohol and acetone, slightly soluble in ethyl acetate and acetonitrile and very slightly soluble in water. Sitagliptin Sitagliptin phosphate monohydrate is described chemically as 7-[(3 R )-3-amino-1-oxo-4-(2,4,5-trifluorophenyl)butyl]-5,6,7,8-tetrahydro-3-(trifluoromethyl)-1,2,4-triazolo[4,3- a ]pyrazine phosphate (1:1) monohydrate. The empirical formula is C 16 H 15 F 6 N 5 O∙H 3 PO 4 ∙H 2 O and the molecular weight is 523.32. The structural formula is: Sitagliptin phosphate monohydrate is a white to off-white, crystalline, non-hygroscopic powder. It is soluble in water and N,N-dimethyl formamide; slightly soluble in methanol; very slightly soluble in ethanol, acetone, and acetonitrile; and insoluble in isopropanol and isopropyl acetate. STEGLUJAN is available for oral use as film-coated tablets containing: 6.48 mg ertugliflozin L-pyroglutamic acid equivalent to 5 mg of ertugliflozin and 128.5 mg sitagliptin phosphate monohydrate equivalent to 100 mg sitagliptin (STEGLUJAN 5/100) 19.43 mg ertugliflozin L-pyroglutamic acid equivalent to 15 mg of ertugliflozin and 128.5 mg sitagliptin phosphate monohydrate equivalent to 100 mg sitagliptin (STEGLUJAN 15/100) Inactive ingredients are microcrystalline cellulose, dibasic calcium phosphate anhydrous, croscarmellose sodium, sodium stearyl fumarate, magnesium stearate, and propyl gallate. The film coating contains: hypromellose, hydroxypropyl cellulose, titanium dioxide, iron oxide red, iron oxide yellow, ferrosoferric oxide/black iron oxide, and carnauba wax. Chemical Structure Chemical Structure

10 OVERDOSAGE STEGLUJAN In the event of an overdose with STEGLUJAN, contact the Poison Help line (1-800-222-1222) or a medical toxicologist for additional overdosage management recommendations. Employ the usual supportive measures as dictated by the patient's clinical status. Ertugliflozin Removal of ertugliflozin by hemodialysis has not been studied. Sitagliptin In the event of an overdose, it is reasonable to employ the usual supportive measures, e.g., remove unabsorbed material from the gastrointestinal tract, employ clinical monitoring (including obtaining an electrocardiogram), and institute supportive therapy as dictated by the patient's clinical status. Sitagliptin is modestly dialyzable. In clinical studies, approximately 13.5% of the dose was removed over a 3- to 4-hour hemodialysis session. Prolonged hemodialysis may be considered if clinically appropriate. It is not known if sitagliptin is dialyzable by peritoneal dialysis.

16 HOW SUPPLIED/STORAGE AND HANDLING STEGLUJAN (ertugliflozin and sitagliptin) tablets are available in the strengths listed below: Strength Description How Supplied NDC 5 mg/100 mg tablets beige, almond-shaped, debossed with “554” on one side and plain on the other side. unit-of-use bottles of 30 0006-5367-03 unit-of-use bottles of 90 0006-5367-06 15 mg/100 mg tablets brown, almond-shaped, debossed with “555” on one side and plain on the other side. unit-of-use bottles of 30 0006-5368-03 unit-of-use bottles of 90 0006-5368-06 Store at 20°C-25°C (68°F-77°F), excursions permitted between 15°C-30°C (between 59°F-86°F) [see USP Controlled Room Temperature]. Protect from moisture. Store in a dry place.