PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

NDC 70771-1790-9 in bottles of 90 tablets

Sitagliptin Tablets, 25 mg

90 Tablets

Rx Only


NDC 70771-1791-9 in bottles of 90 tablets

Sitagliptin Tablets, 50 mg

90 Tablets

Rx Only


NDC 70771-1792-9 in bottles of 90 tablets

Sitagliptin Tablets, 100 mg

90 Tablets

Rx Only


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DESCRIPTION SECTION

11 DESCRIPTION

Sitagliptin Tablets contain sitagliptin free base, an orally active inhibitor of the DPP-4 enzyme.

Sitagliptin free base is described chemically as 7-[(3R)-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.

The empirical formula is C16H15F6N5O and the molecular weight is 407.31. The structural formula is:


Sitagliptin free base is a white to off-white, non-hygroscopic powder. Sitagliptin free base is soluble in methanol and slightly soluble in water.

Each film coated tablet of sitagliptin contains sitagliptin free base 25 mg, 50 mg, or 100 mg as active ingredient and the following inactive ingredients: anhydrous dibasic calcium phosphate, colloidal silicon dioxide, croscarmellose sodium, malic acid, magnesium stearate, microcrystalline cellulose, and povidone. In addition, the film coating contains the following inactive ingredients: polyethylene glycol, polyvinyl alcohol, talc, and titanium dioxide. The 50 mg tablet's film coating also contains ferrosoferric oxide and iron oxide yellow. The 100 mg tablet's film coating also contains FD&C Yellow #6 Aluminum Lake and iron oxide yellow.

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INDICATIONS & USAGE SECTION

Highlight: Sitagliptin Tablets are a dipeptidyl peptidase-4 (DPP-4) inhibitor indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus. (1)

Limitations of Use:

• Sitagliptin Tablets are not recommended in patients with type 1 diabetes mellitus. (1)
• Sitagliptin Tablets has not been studied in patients with a history of pancreatitis. (1)

1 INDICATIONS AND USAGE

Sitagliptin Tablets are indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus.

Limitations of Use

Sitagliptin Tablets is not recommended in patients with type 1 diabetes mellitus.

Sitagliptin Tablets have 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 Sitagliptin Tablets. [see Warnings and Precautions (5.1)].

DOSAGE FORMS & STRENGTHS SECTION

Highlight: Tablets: 100 mg, 50 mg, and 25 mg (3)

3 DOSAGE FORMS AND STRENGTHS

• 100 mg tablets are beige, round, biconvex, film coated tablets debossed with "12" on one side and "42" on the other side.
• 50 mg tablets are pale yellow, round, biconvex, film coated tablets debossed with "12" on one side and "41" on the other side.
• 25 mg tablets are white to off white, round, biconvex, film coated tablets debossed with "12" on one side and "40" on the other side.

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DRUG INTERACTIONS SECTION

7 DRUG INTERACTIONS

7.1 Insulin Secretagogues or Insulin

Sitagliptin lowers blood glucose in patients with type 2 diabetes mellitus. Coadministration of sitagliptin with an insulin secretagogue (e.g., sulfonylurea) or insulin may require lower doses of the insulin secretagogue or insulin to reduce the risk of hypoglycemia. [see Warnings and Precautions (5.4) ].

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USE IN SPECIFIC POPULATIONS SECTION

8 USE IN SPECIFIC POPULATIONS

8.1 Pregnancy

Risk Summary

The limited available data with sitagliptin in pregnant women are not sufficient to inform a drug-associated risk for major birth defects and miscarriage. There are risks to the mother and fetus associated with poorly controlled diabetes in pregnancy [see Clinical Considerations]. No adverse developmental effects were observed when sitagliptin was administered to pregnant rats and rabbits during organogenesis at oral doses up to 30-times and 20-times, respectively, the 100 mg clinical dose, based on AUC [see Data].

The estimated background risk of major birth defects is 6 to 10% in women with pre-gestational diabetes with a hemoglobin A1c (A1C) >7% and has been reported to be as high as 20 to 25% in women with a A1C >10%. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 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, still birth, and macrosomia related morbidity.

Data

Animal Data

In embryo-fetal development studies, sitagliptin administered to pregnant rats and rabbits during organogenesis (gestation day 6 to 20) did not adversely affect developmental outcomes at oral doses up to 250 mg/kg (30-times the 100 mg clinical dose) and 125 mg/kg (20-times the 100 mg clinical dose), respectively, based on AUC. Higher doses in rats associated with maternal toxicity increased the incidence of rib malformations in offspring at 1,000 mg/kg, or approximately 100-times the clinical dose, based on AUC. Placental transfer of sitagliptin was observed in pregnant rats and rabbits.

Sitagliptin administered to female rats from gestation day 6 to lactation day 21 caused no functional or behavioral toxicity in offspring of rats at doses up to 1,000 mg/kg.

8.2 Lactation

Risk Summary

There is no information regarding the presence of sitagliptin in human milk, the effects on the breastfed infant, or the effects on milk production. Sitagliptin is present in rat milk and therefore possibly present in human milk [see Data]. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for sitagliptin and any potential adverse effects on the breastfed infant from sitagliptin or from the underlying maternal condition.

Data

Sitagliptin is secreted in the milk of lactating rats at a milk to plasma ratio of 4:1.

8.4 Pediatric Use

The safety and effectiveness of Sitagliptin Tablets have not been established in pediatric patients.

Pediatric information describing clinical trials in which efficacy was not demonstrated is approved for Merck Sharp and Dohme's JANUVIA (sitagliptin) tablets. However, due to Merck Sharp and Dohme's marketing exclusivity rights, this drug product is not labeled with that information.

8.5 Geriatric Use

Of the total number of subjects (N=3,884) in pre-approval clinical safety and efficacy trials of sitagliptin, 725 patients were 65 years and over, while 61 patients were 75 years and over. No overall differences in safety or effectiveness of sitagliptin have been observed between patients 65 years and over and younger patients.

Because sitagliptin is substantially excreted by the kidney, and because aging can be associated with reduced renal function, renal function should be assessed more frequently in elderly patients [see Dosage and Administration (2.2), Warnings and Precautions (5.3)]

8.6 Renal Impairment

Sitagliptin is excreted by the kidney, and sitagliptin exposure is increased in patients with renal impairment. Lower dosages are recommended in patients with eGFR less than 45 mL/min/1.73 m2(moderate and severe renal impairment, as well as in ESRD patients requiring dialysis). [see Dosage and Administration (2.2); Clinical Pharmacology (12.3)].

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ADVERSE REACTIONS SECTION

Highlight: Most common adverse reactions (incidence ≥5%) are: 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 Zydus Pharmaceuticals (USA) Inc. at 1-877-993-8779 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6 ADVERSE REACTIONS

The following adverse reactions are also discussed elsewhere in the prescribing information:

• Pancreatitis [see Warnings and Precautions (5.1)]
• Heart Failure [see Warnings and Precautions (5.2)]
• Acute Renal Failure [see Warnings and Precautions (5.3)]
• Hypoglycemia with Concomitant Use with Insulin or Insulin Secretagogues [see Warnings and Precautions (5.4)]
• Hypersensitivity Reactions [see Warnings and Precautions (5.5)]
• Severe and Disabling Arthralgia [see Warnings and Precautions (5.6)]
• Bullous Pemphigoid [see Warnings and Precautions (5.7)]

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.

Common Adverse Reactions

In controlled clinical trials as both monotherapy and combination therapy with metformin, pioglitazone, or rosiglitazone and metformin, the overall incidence of adverse reactions, hypoglycemia, and discontinuation of therapy due to clinical adverse reactions with sitagliptin were similar to placebo. In combination with glimepiride, with or without metformin, the overall incidence of clinical adverse reactions with sitagliptin was higher than with placebo, in part related to a higher incidence of hypoglycemia (see Table 3); the incidence of discontinuation due to clinical adverse reactions was similar to placebo.

Two placebo-controlled monotherapy trials, one of 18- and one of 24-week duration, included patients treated with sitagliptin 100 mg daily, sitagliptin 200 mg daily, and placebo. Five placebo-controlled add-on combination therapy trials were also conducted: one with metformin; one with pioglitazone; one with metformin and rosiglitazone; one with glimepiride (with or without metformin); and one with insulin (with or without metformin). In these trials, patients with inadequate glycemic control on a stable dosage of the background therapy were randomized to add-on therapy with sitagliptin 100 mg daily or placebo. The adverse reactions, excluding hypoglycemia, reported in ≥5% of patients treated with sitagliptin 100 mg daily and more commonly than in patients treated with placebo, are shown in Table 1 for the clinical trials of at least 18 weeks duration. Incidences of hypoglycemia are shown in Table 3.

Table 1: Placebo-Controlled Clinical Trials of Sitagliptin Monotherapy or Add-on Combination Therapy with Pioglitazone, Metformin + Rosiglitazone, or Glimepiride +/-Metformin: Adverse Reactions (Excluding Hypoglycemia) Reported in ≥5% of Patients and More Commonly than in Patients Given Placebo*

In the 24-week trial of patients receiving sitagliptin as add-on combination therapy with metformin, there were no adverse reactions reported in ≥5% of patients and more commonly than in patients given placebo.

In the 24-week trial of patients receiving sitagliptin as add-on therapy to insulin (with or without metformin), there were no adverse reactions reported in ≥5% of patients and more commonly than in patients given placebo, except for hypoglycemia (see Table 3).

In the trial of sitagliptin as add-on combination therapy with metformin and rosiglitazone (Table 1), through Week 54 the adverse reactions reported in ≥5% of patients treated with sitagliptin and more commonly than in patients treated with placebo were: upper respiratory tract infection (sitagliptin, 15.5%; placebo, 6.2%), nasopharyngitis (11%, 9.3%), peripheral edema (8.3%, 5.2%), and headache (5.5%, 4.1%).

In an additional, 24-week, placebo-controlled factorial trial of initial therapy with sitagliptin in combination with metformin, the adverse reactions reported in ≥5% of patients are shown in Table 2.

Table 2: Initial Therapy with Combination of Sitagliptin and Metformin: Adverse Reactions Reported in ≥5% of Patients Receiving Combination Therapy (and Greater than in Patients Receiving Metformin alone, Sitagliptin alone, and Placebo)*

In a 24-week trial of initial therapy with sitagliptin in combination with pioglitazone, there were no adverse reactions reported in ≥5% of patients and more commonly than in patients given pioglitazone alone.

Other Adverse Reactions

Hypoglycemia

In the above trials (N=9), adverse reactions of hypoglycemia were based on all reports of symptomatic hypoglycemia. A concurrent blood glucose measurement was not required although most (74%) reports of hypoglycemia were accompanied by a blood glucose measurement ≤70 mg/dL. When sitagliptin was coadministered with a sulfonylurea or with insulin, the percentage of patients with at least one adverse reaction of hypoglycemia was higher than in the corresponding placebo group (Table 3).

Table 3: Incidence and Rate of Hypoglycemia*in Placebo-Controlled Clinical Trials when Sitagliptin was used as Add-On Therapy to Glimepiride (with or without Metformin) or Insulin (with or without Metformin)

In a pooled analysis of the two monotherapy trials, the add-on to metformin trial, and the add-on to pioglitazone trial, the overall incidence of adverse reactions of hypoglycemia was 1.2% in patients treated with sitagliptin 100 mg and 0.9% in patients treated with placebo.

In the trial of sitagliptin as add-on combination therapy with metformin and rosiglitazone, the overall incidence of hypoglycemia was 2.2% in patients given add-on sitagliptin and 0% in patients given add-on placebo through Week 18. Through Week 54, the overall incidence of hypoglycemia was 3.9% in patients given add-on sitagliptin and 1% in patients given add-on placebo.

In the 24-week, placebo-controlled factorial trial of initial therapy with sitagliptin in combination with metformin, the incidence of hypoglycemia was 0.6% in patients given placebo, 0.6% in patients given sitagliptin alone, 0.8% in patients given metformin alone, and 1.6% in patients given sitagliptin in combination with metformin.

In the trial of sitagliptin as initial therapy with pioglitazone, one patient taking sitagliptin experienced a severe episode of hypoglycemia. There were no severe hypoglycemia episodes reported in other trials except in the trial involving coadministration with insulin.

In an additional, 30-week placebo-controlled, trial of patients with type 2 diabetes mellitus inadequately controlled with metformin comparing the maintenance of sitagliptin 100 mg versus withdrawal of sitagliptin when initiating basal insulin therapy, the event rate and incidence of documented symptomatic hypoglycemia (blood glucose measurement ≤70 mg/dL) did not differ between the sitagliptin and placebo groups.

Gastrointestinal Adverse Reactions

In a pooled analysis of the two monotherapy trials, the add-on to metformin trial, and the add-on to pioglitazone trial, the incidence of selected gastrointestinal adverse reactions in patients treated with sitagliptin was as follows: abdominal pain (Sitagliptin Tablets 100 mg, 2.3%; placebo, 2.1%), nausea (1.4%, 0.6%), and diarrhea (3%, 2.3%).

Pancreatitis

In a pooled analysis of 19 double-blind clinical trials that included data from 10,246 patients randomized to receive sitagliptin 100 mg/day (N=5,429) or corresponding (active or placebo) control (N=4,817), the incidence of acute pancreatitis was 0.1 per 100 patient-years in each group (4 patients with an event in 4,708 patient-years for sitagliptin and 4 patients with an event in 3,942 patient-years for control).

Vital Sign and Electrocardiogram (EGC) Changes

No clinically meaningful changes in vital signs or in ECG (including in QTc interval) were observed in patients treated with sitagliptin

Laboratory Tests

Across clinical trials, the incidence of laboratory adverse reactions was similar in patients treated with sitagliptin 100 mg compared to patients treated with placebo. A small increase in white blood cell count (WBC) was observed due to an increase in neutrophils. This increase in WBC (of approximately 200 cells/microL vs placebo, in four pooled placebo-controlled clinical trials, with a mean baseline WBC count of approximately 6,600 cells/microL) is not considered to be clinically relevant. In a 12-week trial of 91 patients with chronic renal insufficiency, 37 patients with moderate renal insufficiency were randomized to sitagliptin 50 mg daily, while 14 patients with the same magnitude of renal impairment were randomized to placebo. Mean (SE) increases in serum creatinine were observed in patients treated with sitagliptin [0.12 mg/dL (0.04)] and in patients treated with placebo [0.07 mg/dL (0.07)]. The clinical significance of this added increase in serum creatinine relative to placebo is not known.

6.2 Postmarketing Experience

The following adverse reactions have been identified during post-approval use of sitagliptin as monotherapy and/or in combination with other antihyperglycemic agents. Because these reactions are reported voluntarily from a population of uncertain size, it is generally not possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Skin and subcutaneous tissue disorders: hypersensitivity reactions including anaphylaxis, angioedema, rash, urticaria, cutaneous vasculitis, bullous pemphigoid, and exfoliative skin conditions including Stevens-Johnson syndrome

Hepatobiliary disorders: hepatic enzyme elevations

Gastrointestinal disorders: acute pancreatitis, including fatal and non-fatal hemorrhagic and necrotizing pancreatitis, constipation; vomiting, mouth ulceration, and stomatitis

Renal and urinary disorders: worsening renal function, including acute renal failure (sometimes requiring dialysis), and tubulointerstitial nephritis

Musculoskeletal and connective tissue disorders: severe and disabling arthralgia; myalgia; pain in extremity; back pain; pruritus; rhabdomyolysis

Nervous system disorders: headache

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OVERDOSAGE SECTION

10 OVERDOSAGE

In the event of an overdose with Sitagliptin Tablets, consider contacting the Poison Help line (1-800-222-1222) or a medical toxicologist for additional overdosage management recommendations. Employ the usual supportive measures dictated by the patient's clinical status. Per clinical judgment, consider removal of unabsorbed material from the gastrointestinal tract and clinical monitoring (including obtaining an ECG).

Sitagliptin is modestly dialyzable. In clinical trials, 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.

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NONCLINICAL TOXICOLOGY SECTION

13 NONCLINICAL TOXICOLOGY

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

A two-year carcinogenicity study was conducted in male and female rats given oral doses of sitagliptin of 50, 150, and 500 mg/kg/day. There was an increased incidence of combined liver adenoma/carcinoma in males and females and of liver carcinoma in females at 500 mg/kg. This dose results in exposures approximately 60 times the human exposure at the maximum recommended daily adult human dose (MRHD) of 100 mg/day based on AUC comparisons. Liver tumors were not observed at 150 mg/kg, approximately 20 times the human exposure at the MRHD. A two-year carcinogenicity study was conducted in male and female mice given oral doses of sitagliptin of 50, 125, 250, and 500 mg/kg/day. There was no increase in the incidence of tumors in any organ up to 500 mg/kg, approximately 70 times human exposure at the MRHD. Sitagliptin was not mutagenic or clastogenic with or without metabolic activation in the Ames bacterial mutagenicity assay, a Chinese hamster ovary (CHO) chromosome aberration assay, an in vitro cytogenetics assay in CHO, an in vitro rat hepatocyte DNA alkaline elution assay, and an in vivo micronucleus assay.

In rat fertility studies with oral gavage doses of 125, 250, and 1,000 mg/kg, males were treated for 4 weeks prior to mating, during mating, up to scheduled termination (approximately 8 weeks total) and females were treated 2 weeks prior to mating through gestation day 7. No adverse effect on fertility was observed at 125 mg/kg (approximately 12 times human exposure at the MRHD of 100 mg/day based on AUC comparisons). At higher doses, non-dose-related increased resorptions in females were observed (approximately 25 and 100 times human exposure at the MRHD based on AUC comparison).

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SPL MEDGUIDE SECTION

MEDICATION GUIDE

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