XIGDUO XR tablets contain: dapagliflozin, a SGLT2 inhibitor, and metformin HCl, a biguanide. Dapagliflozin Dapagliflozin is described chemically as D-glucitol, 1,5-anhydro-1-C-[4-chloro-3-[(4-ethoxyphenyl)methyl]phenyl]-, (1S)-, compounded with (2S)-1,2-propanediol, hydrate (1:1:1). The empirical formula is C 21 H 25 ClO 6 •C 3 H 8 O 2 •H 2 O and the formula weight is 502.98. The structural formula is: Dapagliflozin chemical structure Metformin HCl Metformin HCl (N,N-dimethylimidodicarbonimidic diamide HCl) is a white to off-white crystalline compound with a molecular formula of C 4 H 11 N 5 •HCl and a molecular weight of 165.63. Metformin HCl is freely soluble in water, slightly soluble in alcohol, and is practically insoluble in acetone, ether, and chloroform. The pK a of metformin is 12.4. The pH of a 1% aqueous solution of metformin HCl is 6.68. The structural formula is: Metformin hydrochloride chemical structure XIGDUO XR XIGDUO XR is available for oral administration as tablets containing the equivalent of 2.5 mg dapagliflozin as dapagliflozin propanediol and 1,000 mg metformin HCl which is equivalent to 779.86 mg metformin base (XIGDUO XR 2.5 mg/1,000 mg), 5 mg dapagliflozin as dapagliflozin propanediol and 500 mg metformin HCl which is equivalent to 389.9 mg metformin base (XIGDUO XR 5 mg/500 mg), the equivalent of 5 mg dapagliflozin as dapagliflozin propanediol and 1,000 mg metformin HCl which is equivalent to 779.86 mg metformin base (XIGDUO XR 5 mg/1,000 mg), the equivalent of 10 mg dapagliflozin as dapagliflozin propanediol and 500 mg metformin HCl which is equivalent to 389.9 mg metformin base (XIGDUO XR 10 mg/500 mg), or the equivalent of 10 mg dapagliflozin as dapagliflozin propanediol and 1,000 mg metformin HCl which is equivalent to 779.86 mg metformin base (XIGDUO XR 10 mg/1,000 mg). Each film-coated tablet of XIGDUO XR contains the following inactive ingredients: anhydrous lactose, carboxymethylcellulose sodium, crospovidone, hypromellose, magnesium stearate, microcrystalline cellulose, and silicon dioxide. The film coatings contain the following inactive ingredients: polyethylene glycol, polyvinyl alcohol, talc, and titanium dioxide. Additionally, the film coating for the XIGDUO XR 5 mg/500 mg tablets contains FD&C Yellow No. 6/Sunset Yellow FCF aluminum lake. The film coating for the XIGDUO XR 2.5 mg/1,000 mg, 5 mg/1,000 mg, 10 mg/500 mg, and 10 mg/1,000 mg tablets contains iron oxides.

XIGDUO XR is a combination of dapagliflozin and metformin hydrochloride (HCl) extended-release, indicated as an adjunct to diet and exercise to improve glycemic control in adults and pediatric patients aged 10 years and older with type 2 diabetes mellitus. Dapagliflozin, when used as a component of XIGDUO XR, is indicated in adults with type 2 diabetes mellitus to reduce the risk of: • Sustained eGFR decline, end‑stage kidney disease, (CV) death, and hospitalization for heart failure in patients with chronic kidney disease at risk of progression. • CV death, hospitalization for heart failure, and urgent heart failure visit in patients with heart failure. • Hospitalization for heart failure in patients with type 2 diabetes mellitus and either established CV disease or multiple CV risk factors. Limitations of Use • XIGDUO XR is not recommended for use to improve glycemic control in patients with type 1 diabetes mellitus . • Because of the metformin HCl component, the use of XIGDUO XR is limited to patients with type 2 diabetes mellitus for all indications. • XIGDUO XR is not recommended for the treatment of chronic kidney disease in patients with polycystic kidney disease or patients requiring or with a recent history of immunosuppressive therapy for kidney disease. XIGDUO XR is not expected to be effective in these populations. XIGDUO XR is a combination of dapagliflozin, a sodium-glucose cotransporter 2 (SGLT2) inhibitor, and metformin hydrochloride (HCl), a biguanide, indicated as an adjunct to diet and exercise to improve glycemic control in adults and pediatric patients aged 10 years and older with type 2 diabetes mellitus. Dapagliflozin when used as a component of XIGDUO XR, is indicated in adults with type 2 diabetes mellitus to reduce the risk of: • Sustained eGFR decline, end-stage kidney disease, cardiovascular (CV) death, and hospitalization for heart failure in patients with chronic kidney disease at risk of progression. • CV death, hospitalization for heart failure, and urgent heart failure visit in patients with heart failure. • Hospitalization for heart failure in patients with type 2 diabetes mellitus and either established CV disease or multiple CV risk factors. Limitations of use : • Not recommended for use to improve glycemic control in patients with type 1 diabetes mellitus. • Because of the metformin HCl component, the use of XIGDUO XR is limited to patients with type 2 diabetes mellitus for all indications. • Not recommended for the treatment of chronic kidney disease in patients with polycystic kidney disease or patients requiring or with a recent history of immunosuppressive therapy for the treatment of kidney disease. XIGDUO XR is not expected to be effective in these populations.

XIGDUO XR (dapagliflozin and metformin HCl) extended-release tablets are available as follows: Table 1: Dosage Forms and Strengths for XIGDUO XR Dapagliflozin Strength Metformin HCl Strength Color/Shape Tablet Markings 2.5 mg 1,000 mg light brown to brown, biconvex, oval-shaped, and film-coated tablet "1074" and "2.5/1000" debossed on one side and plain on the reverse side 5 mg 500 mg orange, biconvex, capsule-shaped, and film-coated tablet "1070" and "5/500" debossed on one side and plain on the reverse side 5 mg 1,000 mg pink to dark pink, biconvex, oval-shaped, and film-coated tablet "1071" and "5/1000" debossed on one side and plain on the reverse side 10 mg 500 mg pink, biconvex, capsule-shaped, and film-coated tablet "1072" and "10/500" debossed on one side and plain on the reverse side 10 mg 1,000 mg yellow to dark yellow, biconvex, oval-shaped, and film-coated tablet "1073" and "10/1000" debossed on one side and plain on the reverse side • 2.5 mg dapagliflozin/1,000 mg metformin HCl extended-release • 5 mg dapagliflozin/500 mg metformin HCl extended-release • 5 mg dapagliflozin/1,000 mg metformin HCl extended-release • 10 mg dapagliflozin/500 mg metformin HCl extended-release • 10 mg dapagliflozin/1,000 mg metformin HCl extended-release

• Assess renal function prior to initiating and then as clinically indicated. • Assess volume status and correct volume depletion before initiating. • Individualize the starting dosage based on the patient’s current treatment. • Administer orally once daily in the morning with food. • To improve glycemic control, for patients aged 10 years and older not already taking dapagliflozin, the recommended starting dosage for dapagliflozin is 5 mg once daily. • For indications in adults related to heart failure and chronic kidney disease the recommended dosage of dapagliflozin is 10 mg once daily. • Do not exceed a daily dosage of 10 mg dapagliflozin/2,000 mg metformin HCl extended-release. • See Full Prescribing Information for dosage recommendations in patients with renal impairment. • XIGDUO XR may need to be discontinued at time of, or prior to, iodinated contrast imaging procedures. • Withhold XIGDUO XR for at least 3 days, if possible, prior to surgery or procedures associated with prolonged fasting

Testing Prior to Initiation of XIGDUO XR • Assess renal function prior to initiating XIGDUO XR and then as clinically indicated . • Assess volume status. In patients with volume depletion, correct this condition before initiating XIGDUO XR

Recommended Administration • Take XIGDUO XR orally once daily in the morning with food. • Swallow XIGDUO XR tablets whole and never crush, cut, or chew

Recommended Dosage • Individualize the starting dosage of XIGDUO XR based upon the patient’s current regimen. Patients taking an evening dosage of metformin HCl extended‑release should skip their last dose before starting XIGDUO XR. • To improve glycemic control in adults and pediatric patients aged 10 years and older not already taking: ∘ Dapagliflozin: the recommended starting dosage of dapagliflozin in XIGDUO XR is 5 mg orally once daily. ∘ Metformin HCl extended‑release: the recommended starting dosage of metformin HCl extended‑release in XIGDUO XR is 500 mg orally once daily. • For XIGDUO XR indications in adults related to heart failure and chronic kidney disease, the recommended dosage of dapagliflozin in XIGDUO XR is 10 mg orally once daily. • For all XIGDUO XR indications, the dosage may be adjusted based on effectiveness and tolerability. The maximum recommended daily dosage of dapagliflozin is 10 mg and 2,000 mg of metformin HCl extended‑release, with gradual dosage escalation to reduce gastrointestinal adverse reactions with metformin HCl

Recommended Dosage in Patients with Renal Impairment • The recommended dosage of XIGDUO XR in patients with an estimated glomerular filtration rate (eGFR) greater than or equal to 45 mL/min/1.73 m 2 is the same as the recommended dosage in patients with normal renal function. • Initiation of XIGDUO XR is not recommended in patients with an eGFR between 30 and 45 mL/min/1.73 m 2 . Assess the benefit and risk of continuing therapy if eGFR falls persistently below this level. ∘ Dapagliflozin is likely to be ineffective to improve glycemic control in patients with eGFR less than 45 mL/min/1.73 m 2 . ∘ Metformin HCl initiation is not recommended for patients with eGFR less than 45 mL/min/1.73 m 2 . • XIGDUO XR is contraindicated in patients with an eGFR below 30 mL/min/1.73 m2 and end‑stage renal disease due to the metformin HCl component [ see Contraindications , Warnings and Precautions , and Use in Specific Populations ]

Discontinuation for Iodinated Contrast Imaging Procedures Discontinue XIGDUO XR at the time of, or prior to, an iodinated contrast imaging procedure in patients with an eGFR less than 60 mL/min/1.73 m 2 , in patients with a history of liver disease, alcoholism or heart failure; or in patients who will be administered intra-arterial iodinated contrast. Re-evaluate eGFR 48 hours after the imaging procedure; restart XIGDUO XR if renal function is stable

Temporary Interruption for Surgery Withhold XIGDUO XR for at least 3 days, if possible, prior to surgery or procedures associated with prolonged fasting. Resume XIGDUO XR when the patient is clinically stable and has resumed oral intake

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.

• Lactic Acidosis: See boxed warning. • 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 XIGDUO XR if ketoacidosis is suspected. Monitor patients for resolution of ketoacidosis before restarting. • Volume Depletion: Before initiating XIGDUO XR, assess and correct volume status in the elderly, patients with renal impairment or low systolic blood pressure, and in patients on diuretics. Monitor for signs and symptoms during therapy. • Genitourinary Infections, including Urosepsis, Pyelonephritis, Necrotizing Fasciitis of the Perineum (Fournier's Gangrene), and Genital Mycotic Infections: Monitor patients for signs and symptoms of genitourinary infections and treat promptly, if indicated. Immediately evaluate patients presenting with pain or tenderness, erythema, or swelling in the genital or perineal area, along with fever or malaise, for necrotizing fasciitis and if suspected, discontinue XIGDUO XR, and promptly institute appropriate medical and/or surgical intervention. • Hypoglycemia with Concomitant Use with Insulin or Insulin Secretagogues: Consider a lower dosage of insulin or an insulin secretagogue to reduce the risk of hypoglycemia when used concomitantly with XIGDUO XR. • Vitamin B12 Deficiency: Metformin may lower vitamin B12 levels. Measure hematological parameters annually. 5.1 Lactic Acidosis There have been post-marketing cases of metformin-associated lactic acidosis, including fatal cases. These cases had a subtle onset and were accompanied by non‑specific symptoms such as malaise, myalgias, abdominal pain, respiratory distress, or increased somnolence; however, hypothermia, hypotension and resistant bradyarrhythmias have occurred with severe acidosis. Metformin-associated lactic acidosis was characterized by elevated blood lactate concentrations (>5 mmol/L), anion gap acidosis (without evidence of ketonuria or ketonemia), and an increased lactate: pyruvate ratio; metformin plasma levels generally >5 mcg/mL. Metformin decreases liver uptake of lactate increasing lactate blood levels which may increase the risk of lactic acidosis, especially in patients at risk. If metformin-associated lactic acidosis is suspected, general supportive measures should be instituted promptly in a hospital setting, along with immediate discontinuation of XIGDUO XR. In XIGDUO XR-treated patients with a diagnosis or strong suspicion of lactic acidosis, prompt hemodialysis is recommended to correct the acidosis and remove accumulated metformin (metformin HCl is dialyzable, with a clearance of up to 170 mL/min under good hemodynamic conditions). Hemodialysis has often resulted in reversal of symptoms and recovery. Educate patients and their families about the symptoms of lactic acidosis and if these symptoms occur, instruct them to discontinue XIGDUO XR and report these symptoms to their healthcare provider. For each of the known and possible risk factors for metformin-associated lactic acidosis, recommendations to reduce the risk of and manage metformin-associated lactic acidosis are provided below: Renal Impairment : The postmarketing metformin-associated lactic acidosis cases primarily occurred in patients with significant renal impairment. The risk of metformin accumulation and metformin-associated lactic acidosis increases with the severity of renal impairment because metformin is substantially excreted by the kidney. Clinical recommendations based upon the patient’s renal function include : • Before initiating XIGDUO XR, obtain an estimated glomerular filtration rate (eGFR). • XIGDUO XR is contraindicated in patients with an eGFR less than 30 mL/min/1.73 m 2 . • Obtain an eGFR at least annually in all patients taking XIGDUO XR. In patients at increased risk for the development of renal impairment (e.g., the elderly), renal function should be assessed more frequently. Drug Interactions: The concomitant use of XIGDUO XR with specific drugs may increase the risk of metformin-associated lactic acidosis: those that impair renal function, result in significant hemodynamic change, interfere with acid-base balance or increase metformin accumulation (e.g., cationic drugs) . Therefore, consider more frequent monitoring of patients. Age 65 or Greater: The risk of metformin-associated lactic acidosis increases with the patient’s age because elderly patients have a greater likelihood of having hepatic, renal, or cardiac impairment than younger patients. Assess renal function more frequently in elderly patients . Radiological Studies with Contrast: Administration of intravascular iodinated contrast agents in metformin-treated patients has led to an acute decrease in renal function and the occurrence of lactic acidosis. Stop XIGDUO XR at the time of, or prior to, an iodinated contrast imaging procedure in patients with a history of hepatic impairment, alcoholism, or heart failure; or in patients who will be administered intra-arterial iodinated contrast. Re-evaluate eGFR 48 hours after the imaging procedure, and restart XIGDUO XR if renal function is stable. Surgery and Other Procedures: Withholding of food and fluids during surgical or other procedures may increase the risk for volume depletion, hypotension and renal impairment. XIGDUO XR should be temporarily discontinued while patients have restricted food and fluid intake. Hypoxic States: Several of the postmarketing cases of metformin-associated lactic acidosis occurred in the setting of acute congestive heart failure (particularly when accompanied by hypoperfusion and hypoxemia). CV collapse (shock), acute myocardial infarction, sepsis, and other conditions associated with hypoxemia have been associated with lactic acidosis and may also cause prerenal azotemia. When such events occur, discontinue XIGDUO XR. Excessive Alcohol Intake: Alcohol potentiates the effect of metformin on lactate metabolism and this may increase the risk of metformin-associated lactic acidosis. Warn patients against excessive alcohol intake while receiving XIGDUO XR. Hepatic Impairment: Patients with hepatic impairment have developed cases of metformin-associated lactic acidosis. This may be due to impaired lactate clearance resulting in higher lactate blood levels. Therefore, avoid use of XIGDUO XR in patients with clinical or laboratory evidence of hepatic disease. Mitochondrial Diseases: Metformin may increase the risk of lactic acidosis in patients with mitochondrial diseases such as mitochondrial encephalomyopathy with lactic acidosis, and stroke-like episodes (MELAS) syndrome and maternally inherited diabetes and deafness (MIDD). XIGDUO XR is not recommended in patients with mitochondrial diseases such as MELAS syndrome and MIDD. If a patient taking XIGDUO XR develops elevated lactic acid levels (with or without accompanying neurologic signs and symptoms), discontinue XIGDUO XR. Depending on the clinical context, consider evaluating the patient for MELAS, MIDD, or other mitochondrial disease

Diabetic Ketoacidosis in Patients with Type 1 Diabetes Mellitus and Other Ketoacidosis In patients with type 1 diabetes mellitus, dapagliflozin, a component of XIGDUO XR, 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 cotransporter 2 (SGLT2) inhibitors compared to patients who received placebo. XIGDUO XR 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, including dapagliflozin. Precipitating conditions for diabetic ketoacidosis or other ketoacidosis include under-insulinization due to insulin dose reduction or missed insulin doses, acute febrile illness, reduced caloric intake, ketogenic diet, surgery, volume depletion, and alcohol abuse. Signs and symptoms are consistent with dehydration and severe metabolic acidosis and include nausea, vomiting, abdominal pain, generalized malaise, and shortness of breath. Blood glucose levels at presentation may be below those typically expected for diabetic ketoacidosis (e.g., less than 250 mg/dL). Ketoacidosis and glucosuria may persist longer than typically expected. Urinary glucose excretion persists for 3 days after discontinuing XIGDUO XR ; however, there have been postmarketing reports of ketoacidosis and/or glucosuria lasting greater than 6 days and some up to 2 weeks after discontinuation of SGLT2 inhibitors. Consider ketone monitoring in patients at risk for ketoacidosis if indicated by the clinical situation. Assess for ketoacidosis regardless of presenting blood glucose levels in patients who present with signs and symptoms consistent with severe metabolic acidosis. If ketoacidosis is suspected, discontinue XIGDUO XR, promptly evaluate, and treat ketoacidosis, if confirmed. Monitor patients for resolution of ketoacidosis before restarting XIGDUO XR. Withhold XIGDUO XR, if possible, in temporary clinical situations that could predispose patients to ketoacidosis. Resume XIGDUO XR when the patient is clinically stable and has resumed oral intake . Educate all patients on the signs and symptoms of ketoacidosis and instruct patients to discontinue XIGDUO XR and seek medical attention immediately if signs and symptoms occur

Volume Depletion Dapagliflozin can cause intravascular volume depletion which may sometimes manifest as symptomatic hypotension or acute transient changes in creatinine. There have been post-marketing reports of acute kidney injury, some requiring hospitalization and dialysis, in patients with type 2 diabetes mellitus receiving SGLT2 inhibitors, including dapagliflozin. Patients with impaired renal function (eGFR less than 60 mL/min/1.73 m 2 ), elderly patients, or patients on loop diuretics may be at increased risk for volume depletion or hypotension. Before initiating XIGDUO XR in patients with one or more of these characteristics, assess volume status and renal function. Monitor for signs and symptoms of hypotension and renal function after initiating therapy

Genitourinary Infections, including Urosepsis, Pyelonephritis, Necrotizing Fasciitis of the Perineum (Fournier’s Gangrene), and Genital Mycotic Infections XIGDUO XR increases urinary glucose excretion and increases the risk of genitourinary infections including urinary tract infections and genital mycotic infections in both male and female patients . Serious genitourinary infections, including urosepsis, pyelonephritis, and necrotizing fasciitis of the perineum (Fournier’s gangrene, a rare life-threatening infection requiring urgent surgical intervention), have occurred in patients receiving SGLT2 inhibitors, including XIGDUO XR . Cases have required hospitalization. In patients with Fournier’s gangrene, serious outcomes have included multiple surgeries and death. Patients with a history of genitourinary infections are more likely to develop genitourinary infections when using XIGDUO XR. Monitor patients for signs and symptoms of genitourinary infections and treat promptly, if indicated. Immediately evaluate patients presenting with pain or tenderness, erythema, or swelling in the genital or perineal area, along with fever or malaise, for necrotizing fasciitis. If suspected, discontinue XIGDUO XR and promptly institute appropriate medical and/or surgical intervention

Hypoglycemia with Concomitant Use with Insulin or Insulin Secretagogues Insulin and insulin secretagogues (e.g., sulfonylureas) are known to cause hypoglycemia. XIGDUO XR may increase the risk of hypoglycemia when combined with insulin and/or an insulin secretagogue . The risk of hypoglycemia may be lowered by a reduction in the dose of sulfonylurea (or other concomitantly administered insulin secretagogues) or insulin. Inform patients using these concomitant medications of the risk of hypoglycemia and educate them on the signs and symptoms of hypoglycemia

Vitamin B12 Deficiency In controlled clinical trials of metformin of 29-week duration, a decrease to subnormal levels of previously normal serum vitamin B 12 levels, without clinical manifestations, was observed in approximately 7% of patients. Such decrease, possibly due to interference with B 12 absorption from the B 12 -intrinsic factor complex, may be associated with anemia but appears to be rapidly reversible with discontinuation of metformin or vitamin B 12 supplementation. Certain individuals (those with inadequate vitamin B 12 or calcium intake or absorption) appear to be predisposed to developing subnormal vitamin B 12 levels. Measure hematologic parameters on an annual basis and vitamin B 12 at 2- to 3-year intervals in patients on XIGDUO XR and manage any abnormalities .

Table 6: Clinically Relevant Interactions with XIGDUO XR Carbonic Anhydrase Inhibitors Clinical Impact Topiramate or other carbonic anhydrase inhibitors (e.g., zonisamide, acetazolamide or dichlorphenamide) frequently causes a decrease in serum bicarbonate and induce non-anion gap, hyperchloremic metabolic acidosis. Concomitant use of these drugs with XIGDUO XR may increase the risk for lactic acidosis. Intervention Consider more frequent monitoring of these patients. Drugs that Reduce Metformin Clearance Clinical Impact Concomitant use of drugs that interfere with common renal tubular transport systems involved in the renal elimination of metformin (e.g., organic cationic transporter-2 [OCT2]/multidrug and toxin extrusion [MATE] inhibitors, such as ranolazine, vandetanib, dolutegravir, and cimetidine) could increase systemic exposure to metformin and may increase the risk for lactic acidosis . Intervention Consider the benefits and risks of concomitant use. Alcohol Clinical Impact Alcohol is known to potentiate the effect of metformin on lactate metabolism. Intervention Warn patients against excessive alcohol intake while receiving XIGDUO XR. Insulin or Insulin Secretagogues Clinical Impact The risk of hypoglycemia may be increased when XIGDUO XR is used concomitantly with insulin or insulin secretagogues (e.g., sulfonylurea) . Intervention Concomitant use may require lower doses of insulin or the insulin secretagogue to reduce the risk of hypoglycemia. Drugs Affecting Glycemic Control Clinical Impact Certain drugs tend to produce hyperglycemia and may lead to loss of glycemic control. These medications include thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, and isoniazid. Intervention When such drugs are administered to a patient receiving XIGDUO XR, observe the patient closely for loss of blood glucose control. When such drugs are withdrawn from a patient receiving XIGDUO XR, observe the patient closely for hypoglycemia. Lithium Clinical Impact Concomitant use of an SGLT2 inhibitor with lithium may decrease serum lithium concentrations. Intervention Monitor serum lithium concentration more frequently during XIGDUO XR 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. • Carbonic anhydrase inhibitors: May increase risk of lactic acidosis. Consider more frequent monitoring. • Drugs that reduce metformin clearance: May increase risk of lactic acidosis. Consider benefits and risks of concomitant use. • See full prescribing information for additional drug interactions and information on interference of XIGDUO XR with laboratory tests.