Professional Information — Glipizide And Metformin Hydrochloride 93 7456 5

Indications and Usage

Glipizide and metformin hydrochloride tablets, USP are indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus.

Dosage and Administration

General Considerations:

Dosage of glipizide and metformin hydrochloride tablets must be individualized on the basis of both effectiveness and tolerance while not exceeding the maximum recommended daily dose of 20 mg glipizide/2,000 mg metformin. Glipizide and metformin hydrochloride tablets should be given with meals and should be initiated at a low dose, with gradual dose escalation as described below, in order to avoid hypoglycemia (largely due to glipizide), reduce GI side effects (largely due to metformin), and permit determination of the minimum effective dose for adequate control of blood glucose for the individual patient.

With initial treatment and during dose titration, appropriate blood glucose monitoring should be used to determine the therapeutic response to glipizide and metformin hydrochloride tablets and to identify the minimum effective dose for the patient. Thereafter, HbA_1c should be measured at intervals of approximately 3 months to assess the effectiveness of therapy. The therapeutic goal in all patients with type 2 diabetes is to decrease FPG, PPG, and HbA_1c to normal or as near normal as possible. Ideally, the response to therapy should be evaluated using HbA_1c, which is a better indicator of long-term glycemic control than FPG alone.

No studies have been performed specifically examining the safety and efficacy of switching to glipizide and metformin hydrochloride tablets therapy in patients taking concomitant glipizide (or other sulfonylurea) plus metformin. Changes in glycemic control may occur in such patients, with either hyperglycemia or hypoglycemia possible. Any change in therapy of type 2 diabetes should be undertaken with care and appropriate monitoring.

When colesevelam is coadministered with glipizide ER, maximum plasma concentration and total exposure to glipizide is reduced. Therefore, glipizide and metformin hydrochloride tablets should be administered at least 4 hours prior to colesevelam.

Glipizide and Metformin Hydrochloride Tablets in Patients with Inadequate Glycemic Control on Diet and Exercise Alone

For patients with type 2 diabetes whose hyperglycemia cannot be satisfactorily managed with diet and exercise alone, the recommended starting dose of glipizide and metformin hydrochloride tablets is 2.5 mg/250 mg once a day with a meal. For patients whose FPG is 280 mg/dL to 320 mg/dL a starting dose of glipizide and metformin hydrochloride tablets 2.5 mg/500 mg twice daily should be considered. The efficacy of glipizide and metformin hydrochloride tablets in patients whose FPG exceeds 320 mg/dL has not been established. Dosage increases to achieve adequate glycemic control should be made in increments of 1 tablet per day every 2 weeks up to maximum of 10 mg/1,000 mg or 10 mg/2,000 mg glipizide and metformin hydrochloride tablets per day given in divided doses. In clinical trials of glipizide and metformin hydrochloride tablets as initial therapy, there was no experience with total daily doses ˃10 mg/2,000 mg per day.

Glipizide and Metformin Hydrochloride Tablets in Patients with Inadequate Glycemic Control on a Sulfonylurea and/or Metformin

For patients not adequately controlled on either glipizide (or another sulfonylurea) or metformin alone, the recommended starting dose of glipizide and metformin hydrochloride tablets is 2.5 mg/500 mg or 5 mg/500 mg twice daily with the morning and evening meals. In order to avoid hypoglycemia, the starting dose of glipizide and metformin hydrochloride tablets should not exceed the daily doses of glipizide or metformin already being taken. The daily dose should be titrated in increments of no more than 5 mg/500 mg up to the minimum effective dose to achieve adequate control of blood glucose or to a maximum dose of 20 mg/2,000 mg per day.

Patients previously treated with combination therapy of glipizide (or another sulfonylurea) plus metformin may be switched to glipizide and metformin hydrochloride tablets 2.5 mg/500 mg or 5 mg/500 mg; the starting dose should not exceed the daily dose of glipizide (or equivalent dose of another sulfonylurea) and metformin already being taken. The decision to switch to the nearest equivalent dose or to titrate should be based on clinical judgment. Patients should be monitored closely for signs and symptoms of hypoglycemia following such a switch and the dose of glipizide and metformin hydrochloride tablets should be titrated as described above to achieve adequate control of blood glucose.

Recommendations for Use in Renal Impairment

Assess renal function prior to initiation of glipizide and metformin hydrochloride and periodically thereafter.

Glipizide and metformin hydrochloride is contraindicated in patients with an estimated glomerular filtration rate (eGFR) below 30 mL/minute/1.73 m².

Initiation of glipizide and metformin hydrochloride in patients with an eGFR between 30 mL/minute/1.73 m² to 45 mL/minute/1.73 m² is not recommended.

In patients taking glipizide and metformin hydrochloride whose eGFR later falls below 45 mL/min/1.73 m², assess the benefit risk of continuing therapy.

Discontinue glipizide and metformin hydrochloride if the patient's eGFR later falls below 30 mL/minute/1.73 m². (See WARNINGS.)

Discontinuation for Iodinated Contrast Imaging Procedures

Discontinue glipizide and metformin hydrochloride at the time of, or prior to, an iodinated contrast imaging procedure in patients with an eGFR between 30 mL/min/1.73 m²and 60 mL/min/1.73 m²; 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 glipizide and metformin hydrochloride if renal function is stable.

Specific Patient Populations:

Glipizide and metformin hydrochloride tablets are not recommended for use during pregnancy or for use in pediatric patients. The initial and maintenance dosing of glipizide and metformin hydrochloride tablets should be conservative in patients with advanced age, due to the potential for decreased renal function in this population. Any dosage adjustment requires a careful assessment of renal function. Generally, elderly, debilitated, and malnourished patients should not be titrated to the maximum dose of glipizide and metformin hydrochloride tablets to avoid the risk of hypoglycemia. Monitoring of renal function is necessary to aid in prevention of metformin-associated lactic acidosis, particularly in the elderly (see WARNINGS and PRECAUTIONS).

Contraindications

Glipizide and metformin hydrochloride tablets are contraindicated in patients with:

1. Severe renal impairment (eGFR below 30 mlL/min/1.73 m²) (see WARNINGS and PRECAUTIONS ).
2. Known hypersensitivity to glipizide or metformin hydrochloride.
3. Acute or chronic metabolic acidosis, including diabetic ketoacidosis, with or without coma. Diabetic ketoacidosis should be treated with insulin.

SPECIAL WARNING ON INCREASED RISK OF CARDIOVASCULAR MORTALITY

The administration of oral hypoglycemic drugs has been reported to be associated with increased cardiovascular mortality as compared to treatment with diet alone or diet plus insulin. This warning is based on the study conducted by the University Group Diabetes Program (UGDP), a long-term prospective clinical trial designed to evaluate the effectiveness of glucose-lowering drugs in preventing or delaying vascular complications in patients with non-insulin-dependent diabetes. The study involved 823 patients who were randomly assigned to 1 of 4 treatment groups (Diabetes 19 (Suppl. 2):747-830, 1970).

UGDP reported that patients treated for 5 years to 8 years with diet plus a fixed dose of tolbutamide (1.5 grams per day) had a rate of cardiovascular mortality approximately 2½ times that of patients treated with diet alone. A significant increase in total mortality was not observed, but the use of tolbutamide was discontinued based on the increase in cardiovascular mortality, thus limiting the opportunity for the study to show an increase in overall mortality. Despite controversy regarding the interpretation of these results, the findings of the UGDP study provide an adequate basis for this warning. The patient should be informed of the potential risks and benefits of glipizide and of alternative modes of therapy.

Although only 1 drug in the sulfonylurea class (tolbutamide) was included in this study, it is prudent from a safety standpoint to consider that this warning may also apply to other hypoglycemic drugs in this class, in view of their close similarities in mode of action and chemical structure.

Adverse Reactions

Glipizide and Metformin Hydrochloride Tablets:

In a double-blind 24 week clinical trial involving glipizide and metformin hydrochloride tablets as initial therapy, a total of 172 patients received glipizide and metformin hydrochloride tablets, 2.5 mg/250 mg, 173 received glipizide and metformin hydrochloride tablets, 2.5 mg/500 mg, 170 received glipizide, and 177 received metformin. The most common clinical adverse events in these treatment groups are listed in Table 4.

In a double-blind 18 week clinical trial involving glipizide and metformin hydrochloride tablets as second-line therapy, a total of 87 patients received glipizide and metformin hydrochloride tablets, 84 received glipizide, and 75 received metformin. The most common clinical adverse events in this clinical trial are listed in Table 5.

Hypoglycemia:

In a controlled initial therapy trial of glipizide and metformin hydrochloride tablets, 2.5 mg/250 mg and 2.5 mg/500 mg the numbers of patients with hypoglycemia documented by symptoms (such as dizziness, shakiness, sweating, and hunger) and a fingerstick blood glucose measurement ≤50 mg/dL were 5 (2.9%) for glipizide, 0 (0%) for metformin, 13 (7.6%) for glipizide and metformin hydrochloride tablets, 2.5 mg/250 mg, and 16 (9.3%) for glipizide and metformin hydrochloride tablets, 2.5 mg/500 mg. Among patients taking either glipizide and metformin hydrochloride tablets, 2.5 mg/250 mg or glipizide and metformin hydrochloride tablets, 2.5 mg/500 mg, 9 (2.6%) patients discontinued glipizide and metformin hydrochloride tablets due to hypoglycemic symptoms and 1 required medical intervention due to hypoglycemia. In a controlled second-line therapy trial of glipizide and metformin hydrochloride tablets, 5 mg/500 mg, the numbers of patients with hypoglycemia documented by symptoms and a fingerstick blood glucose measurement ≤50 mg/dL were 0 (0%) for glipizide, 1 (1.3%) for metformin, and 11 (12.6%) for glipizide and metformin hydrochloride tablets. One (1.1%) patient discontinued glipizide and metformin hydrochloride tablets therapy due to hypoglycemic symptoms and none required medical intervention due to hypoglycemia (see PRECAUTIONS ).

Gastrointestinal Reactions:

Among the most common clinical adverse events in the initial therapy trial were diarrhea and nausea/vomiting; the incidences of these events were lower with both glipizide and metformin hydrochloride tablets dosage strengths than with metformin therapy. There were 4 (1.2%) patients in the initial therapy trial who discontinued glipizide and metformin hydrochloride tablets therapy due to gastrointestinal (GI) adverse events. Gastrointestinal symptoms of diarrhea, nausea/vomiting, and abdominal pain were comparable among glipizide and metformin hydrochloride tablets, glipizide and metformin in the second-line therapy trial. There were 4 (4.6%) patients in the second-line therapy trial who discontinued glipizide and metformin hydrochloride tablets therapy due to GI adverse events.

Glipizide

Gastrointestinal Reactions

Cholestatic and hepatocellular forms of liver injury accompanied by jaundice have been reported rarely in association with glipizide; glipizide and metformin hydrochloride tablets should be discontinued if this occurs.

Drug Interactions

Overdosage

Glipizide:

Overdosage of sulfonylureas, including glipizide, can produce hypoglycemia. Mild hypoglycemic symptoms, without loss of consciousness or neurological findings, should be treated aggressively with oral glucose and adjustments in drug dosage and/or meal patterns. Close monitoring should continue until the physician is assured that the patient is out of danger. Severe hypoglycemic reactions with coma, seizure, or other neurological impairment occur infrequently, but constitute medical emergencies requiring immediate hospitalization. If hypoglycemic coma is diagnosed or suspected, the patient should be given a rapid intravenous injection of concentrated (50%) glucose solution. This should be followed by a continuous infusion of a more dilute (10%) glucose solution at a rate that will maintain the blood glucose at a level above 100 mg/dL. Patients should be closely monitored for a minimum of 24 hours to 48 hours, since hypoglycemia may recur after apparent clinical recovery. Clearance of glipizide from plasma would be prolonged in persons with liver disease. Because of the extensive protein binding of glipizide, dialysis is unlikely to be of benefit.

Metformin Hydrochloride:

Overdose of metformin hydrochloride has occurred, including ingestion of amounts ˃50 g. Hypoglycemia was reported in approximately 10% of cases, but no causal association with metformin hydrochloride has been established. Lactic acidosis has been reported in approximately 32% of metformin overdose cases (see WARNINGS ). Metformin is dialyzable with a clearance of up to 170 mL/min under good hemodynamic conditions. Therefore, hemodialysis may be useful for removal of accumulated drug from patients in whom metformin overdosage is suspected.

Description

Glipizide and metformin hydrochloride tablets, USP contain 2 oral antihyperglycemic drugs used in the management of type 2 diabetes, glipizide and metformin hydrochloride.

Glipizide is an oral antihyperglycemic drug of the sulfonylurea class. The chemical name for glipizide is 1-cyclohexyl-3-[[p-[2-(5-methylpyrazinecarboxamido)ethyl]phenyl] sulfonyl]urea. Glipizide, USP white to almost white; crystalline powder with a molecular formula of C₂₁H₂₇N₅O₄S, a molecular weight of 445.55 and a pK_a of 5.9. The structural formula is represented below.

Metformin hydrochloride, USP is an oral antihyperglycemic drug used in the management of type 2 diabetes. Metformin hydrochloride (N,N-dimethylimidodicarbonimidic diamide monohydrochloride) is not chemically or pharmacologically related to sulfonylureas, thiazolidinediones, or α-glucosidase inhibitors. It is a white to off-white crystalline compound with a molecular formula of C₄H₁₂ClN₅ (monohydrochloride) and a molecular weight of 165.63. Metformin hydrochloride is freely soluble in water, slightly soluble in alcohol, practically insoluble in acetone and in methylene chloride. The pK_a of metformin is 12.4. The pH of a 1% aqueous solution of metformin hydrochloride is 6.68. The structural formula is as shown:

Each glipizide and metformin hydrochloride tablet intended for oral administration contains 2.5 mg glipizide with 250 mg metformin hydrochloride, 2.5 mg glipizide with 500 mg metformin hydrochloride, and 5 mg glipizide with 500 mg metformin hydrochloride. In addition, each tablet contains the following inactive ingredients: croscarmellose sodium, hydroxypropyl methylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, povidone and titanium dioxide. Additionally each 2.5 mg/250 mg and 5 mg/500 mg tablet contains iron oxide red and each 2.5 mg/500 mg tablet contains polysorbate 80.

Clinical Pharmacology

Mechanism of Action:

Glipizide and metformin hydrochloride tablet combines glipizide and metformin hydrochloride, 2 antihyperglycemic agents with complementary mechanisms of action, to improve glycemic control in patients with type 2 diabetes.

Glipizide appears to lower blood glucose acutely by stimulating the release of insulin from the pancreas, an effect dependent upon functioning beta cells in the pancreatic islets. Extrapancreatic effects may play a part in the mechanism of action of oral sulfonylurea hypoglycemic drugs. The mechanism by which glipizide lowers blood glucose during long-term administration has not been clearly established. In man, stimulation of insulin secretion by glipizide in response to a meal is undoubtedly of major importance. Fasting insulin levels are not elevated even on long-term glipizide administration, but the postprandial insulin response continues to be enhanced after at least 6 months of treatment.

Metformin hydrochloride is an antihyperglycemic agent that improves glucose tolerance in patients with type 2 diabetes, lowering both basal and postprandial plasma glucose. Metformin hydrochloride decreases hepatic glucose production, decreases intestinal absorption of glucose, and improves insulin sensitivity by increasing peripheral glucose uptake and utilization.

Pharmacokinetics:

Absorption and Bioavailability:

Glipizide and Metformin Hydrochloride Tablets:

In a single-dose study in healthy subjects, the glipizide and metformin components of glipizide and metformin hydrochloride tablets 5 mg/500 mg were bioequivalent to co-administered glipizide and metformin hydrochloride. Following administration of a single glipizide and metformin hydrochloride 5 mg/500 mg tablet in healthy subjects with either a 20% glucose solution or a 20% glucose solution with food, there was a small effect of food on peak plasma concentration (C_max) and no effect of food on area under the curve (AUC) of the glipizide component. Time to peak plasma concentration (T_max) for the glipizide component was delayed 1 hour with food relative to the same tablet strength administered fasting with a 20% glucose solution. C_max for the metformin component was reduced approximately 14% by food whereas AUC was not affected. T_max for the metformin component was delayed 1 hour after food.

Glipizide:

Gastrointestinal absorption of glipizide is uniform, rapid, and essentially complete. Peak plasma concentrations occur 1 hour to 3 hours after a single oral dose. Glipizide does not accumulate in plasma on repeated oral administration. Total absorption and disposition of an oral dose was unaffected by food in normal volunteers, but absorption was delayed by about 40 minutes.

Metformin Hydrochloride:

The absolute bioavailability of a 500 mg metformin hydrochloride tablet given under fasting conditions is approximately 50% to 60%. Studies using single oral doses of metformin tablets of 500 mg and 1500 mg, and 850 mg to 2550 mg, indicate that there is a lack of dose proportionality with increasing doses, which is due to decreased absorption rather than an alteration in elimination. Food decreases the extent of and slightly delays the absorption of metformin, as shown by approximately a 40% lower peak concentration and a 25% lower AUC in plasma and a 35-minute prolongation of time to peak plasma concentration following administration of a single 850 mg tablet of metformin with food, compared to the same tablet strength administered fasting. The clinical relevance of these decreases is unknown.

Distribution:

Glipizide:

Protein binding was studied in serum from volunteers who received either oral or intravenous glipizide and found to be 98% to 99% 1 hour after either route of administration. The apparent volume of distribution of glipizide after intravenous administration was 11 liters, indicative of localization within the extracellular fluid compartment. In mice, no glipizide or metabolites were detectable autoradiographically in the brain or spinal cord of males or females, nor in the fetuses of pregnant females. In another study, however, very small amounts of radioactivity were detected in the fetuses of rats given labeled drug.

Metformin Hydrochloride:

The apparent volume of distribution (V/F) of metformin following single oral doses of 850 mg averaged 654±358 L. Metformin is negligibly bound to plasma proteins. Metformin partitions into erythrocytes, most likely as a function of time. At usual clinical doses and dosing schedules of metformin, steady state plasma concentrations of metformin are reached within 24 hours to 48 hours and are generally <1 µg/mL. During controlled clinical trials, maximum metformin plasma levels did not exceed 5 µg/mL, even at maximum doses.

Metabolism and Elimination:

Glipizide:

The metabolism of glipizide is extensive and occurs mainly in the liver. The primary metabolites are inactive hydroxylation products and polar conjugates, and are excreted mainly in the urine. Less than 10% unchanged glipizide is found in the urine. The half-life of elimination ranges from 2 hours to 4 hours in normal subjects, whether given intravenously or orally. The metabolic and excretory patterns are similar with the 2 routes of administration, indicating that first-pass metabolism is not significant.

Metformin Hydrochloride:

Intravenous single-dose studies in normal subjects demonstrate that metformin is excreted unchanged in the urine and does not undergo hepatic metabolism (no metabolites have been identified in humans) nor biliary excretion. Renal clearance (see Table 1) is approximately 3.5 times greater than creatinine clearance, which indicates that tubular secretion is the major route of metformin elimination. Following oral administration, approximately 90% of the absorbed drug is eliminated via the renal route within the first 24 hours, with a plasma elimination half-life of approximately 6.2 hours. In blood, the elimination half-life is approximately 17.6 hours, suggesting that the erythrocyte mass may be a compartment of distribution.

Specific Populations:

Patients with Type 2 Diabetes:

In the presence of normal renal function, there are no differences between single- or multiple-dose pharmacokinetics of metformin between patients with type 2 diabetes and normal subjects (see Table 1 ), nor is there any accumulation of metformin in either group at usual clinical doses.

Renal Impairment

The metabolism and excretion of glipizide may be slowed in patients with impaired renal

function (see CONTRAINDICATIONS, WARNINGS, PRECAUTIONS, and DOSAGE AND ADMINISTRATION).

In patients with decreased renal function, the plasma and blood half-life of metformin is prolonged and the renal clearance is decreased (see Table 1; also, see WARNINGS).

Hepatic Impairment

The metabolism and excretion of glipizide may be slowed in patients with impaired hepatic function (see PRECAUTIONS ).

No pharmacokinetic studies have been conducted in patients with hepatic insufficiency for metformin.

Geriatrics:

There is no information on the pharmacokinetics of glipizide in elderly patients.

Limited data from controlled pharmacokinetic studies of metformin in healthy elderly subjects suggest that total plasma clearance is decreased, the half-life is prolonged, and C_max is increased, when compared to healthy young subjects. From these data, it appears that the change in metformin pharmacokinetics with aging is primarily accounted for by a change in renal function (see Table 1 ).

Pediatrics:

No data from pharmacokinetic studies in pediatric subjects are available for glipizide. After administration of a single oral metformin hydrochloride 500 mg tablet with food, geometric mean metformin C_max and AUC differed ˂5% between pediatric type 2 diabetic patients (12 years to 16 years of age) and gender- and weight-matched healthy adults (20 years to 45 years of age), all with normal renal function.

Gender:

There is no information on the effect of gender on the pharmacokinetics of glipizide.

Metformin pharmacokinetic parameters did not differ significantly in subjects with or without type 2 diabetes when analyzed according to gender (males=19, females=16). Similarly, in controlled clinical studies in patients with type 2 diabetes, the antihyperglycemic effect of metformin was comparable in males and females.

Race:

No information is available on race differences in the pharmacokinetics of glipizide.

No studies of metformin pharmacokinetic parameters according to race have been performed. In controlled clinical studies of metformin in patients with type 2 diabetes, the antihyperglycemic effect was comparable in whites (n=249), blacks (n=51), and Hispanics (n=24).

Clinical Studies:

Patients with Inadequate Glycemic Control on Diet and Exercise Alone:

In a 24-week, double-blind, active-controlled, multicenter international clinical trial, patients with type 2 diabetes, whose hyperglycemia was not adequately controlled with diet and exercise alone (hemoglobin A_1c [HbA_1c]>7.5% and ≤12%, and fasting plasma glucose [FPG]<300 mg/dL) were randomized to receive initial therapy with glipizide       5 mg, metformin 500 mg, glipizide and metformin hydrochloride tablets 2.5 mg/250 mg, or glipizide and metformin hydrochloride tablets 2.5 mg/500 mg. After 2 weeks, the dose was progressively increased (up to the 12-week visit) to a maximum of 4 tablets daily in divided doses as needed to reach a target mean daily glucose (MDG) of ≤130 mg/dL. Trial data at 24 weeks are summarized in Table 2.

After 24 weeks, treatment with glipizide and metformin hydrochloride tablets 2.5 mg/250 mg and 2.5 mg/500 mg resulted in significantly greater reduction in HbA_1c compared to glipizide and metformin therapy. Also, glipizide and metformin hydrochloride tablets 2.5 mg/250 mg therapy resulted in significant reductions in FPG versus metformin therapy.

Increases above fasting glucose and insulin levels were determined at baseline and final study visits by measurement of plasma glucose and insulin for 3 hours following a standard mixed liquid meal. Treatment with glipizide and metformin hydrochloride tablets lowered the 3-hour postprandial glucose AUC, compared to baseline, to a significantly greater extent than did the glipizide and the metformin therapies. Compared to baseline, glipizide and metformin hydrochloride tablets enhanced the postprandial insulin response, but did not significantly affect fasting insulin levels.

There were no clinically meaningful differences in changes from baseline for all lipid parameters between glipizide and metformin hydrochloride tablets therapy and either metformin therapy or glipizide therapy. The adjusted mean changes from baseline in body weight were: glipizide and metformin hydrochloride tablets 2.5 mg/250 mg, 0.4 kg; glipizide and metformin hydrochloride tablets 2.5 mg/500 mg, 0.5 kg; glipizide, 0.2 kg; and metformin, 1.9 kg. Weight loss was greater with metformin than with glipizide and metformin hydrochloride tablets.

Patients with Inadequate Glycemic Control on Sulfonylurea Monotherapy:

In an 18-week, double-blind, active-controlled U.S. clinical trial, a total of 247 patients with type 2 diabetes not adequately controlled (HbA_1c ≥ 7.5% and ≤ 12%, and FPG < 300 mg/dL) while being treated with at least one-half the maximum labeled dose of a sulfonylurea (e.g., glyburide 10 mg, glipizide 20 mg) were randomized to receive glipizide (fixed dose, 30 mg), metformin (500 mg), or glipizide and metformin hydrochloride tablets 5 mg/500 mg. The doses of metformin and glipizide and metformin hydrochloride tablets were titrated (up to the 8-week visit) to a maximum of 4 tablets daily as needed to achieve MDG ≤ 130 mg/dL. Trial data at 18 weeks are summarized in Table 3.

After 18 weeks, treatment with glipizide and metformin hydrochloride tablets at doses up to 20 mg/2,000 mg per day resulted in significantly lower mean final HbA_1c and significantly greater mean reductions in FPG compared to glipizide and metformin therapy. Treatment with glipizide and metformin hydrochloride tablets lowered the 3-hour postprandial glucose AUC, compared to baseline, to a significantly greater extent than did the glipizide and the metformin therapies. Glipizide and metformin hydrochloride tablets did not significantly affect fasting insulin levels.

There were no clinically meaningful differences in changes from baseline for all lipid parameters between glipizide and metformin hydrochloride tablets therapy and either metformin therapy or glipizide therapy. The adjusted mean changes from baseline in body weight were: glipizide and metformin hydrochloride tablets 5 mg/500 mg, 0.3 kg; glipizide, 0.4 kg; and metformin, 2.7 kg. Weight loss was greater with metformin than with glipizide and metformin hydrochloride tablets.

How Supplied / Storage and Handling

Glipizide and Metformin Hydrochloride Tablets USP, 2.5 mg/250 mg are pink-colored, biconvex, modified capsule-shaped, film-coated tablet, debossed with "ZE68" on one side and plain on other side and are supplied as follows:

NDC 68382-184-16 in bottle of 90 tablets with child-resistant closure

NDC 68382-184-01 in bottle of 100 tablets

NDC 68382-184-10 in bottle of 1000 tablets

NDC 68382-184-77 in unit-dose blister cartons of 100 (10 x 10) unit-dose tablets

Glipizide and Metformin Hydrochloride Tablets USP, 2.5 mg/500 mg are white-colored, biconvex, modified capsule-shaped, film-coated tablet, debossed with "ZE67" on one side and plain on other side and are supplied as follows:

NDC 68382-185-16 in bottle of 90 tablets with child-resistant closure

NDC 68382-185-01 in bottle of 100 tablets

NDC 68382-185-10 in bottle of 1000 tablets

NDC 68382-185-77 in unit-dose blister cartons of 100 (10 x 10) unit-dose tablets

Glipizide and Metformin Hydrochloride Tablets USP, 5 mg/500 mg are pink-colored, biconvex, modified capsule-shaped, film-coated tablet, debossed with "ZE66" on one side and plain on other side and are supplied as follows:

NDC 68382-186-16 in bottle of 90 tablets with child-resistant closure

NDC 68382-186-01 in bottle of 100 tablets

NDC 68382-186-10 in bottle of 1000 tablets

NDC 68382-186-77 in unit-dose blister cartons of 100 (10 x 10) unit-dose tablets