Glucotrol XL 10mg Tablets

Manufacturer PFIZER Active Ingredient Glipizide Extended-Release Tablets(GLIP i zide) Pronunciation GLIP i zide
It is used to help control blood sugar in people with type 2 diabetes.
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Drug Class
Antidiabetic agent
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Pharmacologic Class
Sulfonylurea
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Pregnancy Category
Category C
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FDA Approved
Sep 1994
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Glucotrol XL is a medication used to help control high blood sugar in people with type 2 diabetes. It works by helping your body release more insulin, a hormone that lowers blood sugar. It's an extended-release tablet, meaning it releases the medicine slowly over time.
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How to Use This Medicine

Taking Your Medication Correctly

To get the most benefit from your medication, follow your doctor's instructions carefully. Read all the information provided with your prescription and follow the instructions closely. Take your medication with your first meal of the day. Swallow the tablet whole - do not chew, break, crush, or dissolve it.

If you have any changes in your eating habits, such as eating less than usual or skipping a meal, be sure to discuss this with your doctor to determine the best course of action.

Storing and Disposing of Your Medication

Store your medication at room temperature in a dry place, away from the bathroom. Keep it in its original container to maintain its effectiveness. It's essential to keep all medications in a safe place, out of the reach of children and pets, to avoid any potential harm.

What to Do If You Miss a Dose

If you miss a dose, take it as soon as you remember. However, if it's close to the time for your next scheduled dose, skip the missed dose and resume your regular dosing schedule. Do not take two doses at the same time or take extra doses to make up for the missed one.
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Lifestyle & Tips

  • Take Glucotrol XL once daily with your first main meal (usually breakfast) to help reduce the risk of low blood sugar.
  • Follow your doctor's recommendations for diet and exercise. These are crucial for managing diabetes.
  • Monitor your blood sugar regularly as instructed by your doctor.
  • Carry a source of fast-acting sugar (e.g., glucose tablets, hard candy, fruit juice) to treat low blood sugar if it occurs.
  • Limit or avoid alcohol consumption, as it can increase the risk of low blood sugar and other side effects.

Dosing & Administration

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Adult Dosing

Standard Dose: Initial: 5 mg orally once daily with breakfast. Maintenance: 5-20 mg orally once daily.
Dose Range: 5 - 20 mg

Condition-Specific Dosing:

Type 2 Diabetes Mellitus: Administer once daily with breakfast. Doses above 20 mg/day have not shown increased efficacy. If switching from immediate-release glipizide, start with the nearest equivalent total daily dose.
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Pediatric Dosing

Neonatal: Not established
Infant: Not established
Child: Not established
Adolescent: Not established
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Dose Adjustments

Renal Impairment:

Mild: No specific dose adjustment required, but monitor closely.
Moderate: Initiate with 2.5 mg once daily, titrate cautiously. Monitor for hypoglycemia.
Severe: Initiate with 2.5 mg once daily, titrate cautiously. Monitor for hypoglycemia. Use with extreme caution.
Dialysis: Not recommended for use in patients on dialysis due to risk of prolonged hypoglycemia. Insulin is generally preferred.

Hepatic Impairment:

Mild: Initiate with 2.5 mg once daily, titrate cautiously. Monitor for hypoglycemia.
Moderate: Initiate with 2.5 mg once daily, titrate cautiously. Monitor for hypoglycemia. Increased risk of hypoglycemia.
Severe: Contraindicated or use with extreme caution. Increased risk of severe, prolonged hypoglycemia. Insulin is generally preferred.

Pharmacology

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Mechanism of Action

Glipizide, a second-generation sulfonylurea, lowers blood glucose primarily by stimulating the release of insulin from the beta cells of the pancreatic islets. It binds to the sulfonylurea receptor (SUR1) on the pancreatic beta-cell membrane, leading to the closure of ATP-sensitive potassium channels. This depolarizes the cell, opening voltage-gated calcium channels, and the resulting calcium influx triggers insulin secretion. It also has some extrapancreatic effects, including increased peripheral glucose utilization and decreased hepatic glucose production.
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Pharmacokinetics

Absorption:

Bioavailability: Approximately 100%
Tmax: 6-12 hours (extended-release)
FoodEffect: Food may delay absorption but does not significantly affect the extent of absorption. Should be taken with breakfast.

Distribution:

Vd: Approximately 10-11 liters
ProteinBinding: >98% (primarily to albumin)
CnssPenetration: Limited

Elimination:

HalfLife: 3-7 hours (terminal half-life)
Clearance: Not readily available (primarily hepatic metabolism)
ExcretionRoute: Renal (approximately 80% as metabolites), Fecal (approximately 10% as metabolites)
Unchanged: <1% (renal)
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Pharmacodynamics

OnsetOfAction: 1-3 hours
PeakEffect: 6-12 hours
DurationOfAction: Up to 24 hours

Safety & Warnings

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Side Effects

Urgent Side Effects: Seek Medical Attention Immediately

While rare, some people may experience severe and potentially life-threatening side effects when taking this medication. If you notice any of the following symptoms, contact your doctor or seek medical help right away:

Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Changes in eyesight
Slurred speech
Tingling
Fever, chills, or sore throat
Unexplained bruising or bleeding
Feeling extremely tired or weak
Low blood sugar (hypoglycemia), which may be more likely when this medication is used with other diabetes medications. Symptoms of low blood sugar may include:
+ Dizziness
+ Headache
+ Feeling sleepy or weak
+ Shaking
+ Fast heartbeat
+ Confusion
+ Hunger
+ Sweating

If you experience any of these symptoms, contact your doctor immediately. To manage low blood sugar, follow your doctor's instructions, which may include taking glucose tablets, liquid glucose, or consuming certain fruit juices.

Other Possible Side Effects

Like all medications, this drug can cause side effects, although many people may not experience any or may only have mild symptoms. If you are bothered by any of the following side effects or if they do not go away, contact your doctor or seek medical help:

Dizziness
Diarrhea
Feeling nervous and excitable
Gas

This is not an exhaustive list of possible side effects. If you have questions or concerns about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
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Seek Immediate Medical Attention If You Experience:

  • Symptoms of low blood sugar (hypoglycemia): sweating, shaking, fast heartbeat, hunger, confusion, dizziness, headache, irritability, blurred vision. If these occur, treat immediately with sugar.
  • Symptoms of high blood sugar (hyperglycemia): increased thirst, frequent urination, increased hunger, fatigue, blurred vision. Report these to your doctor.
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Before Using This Medicine

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following:

Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the allergic reaction you experienced.
A known sulfa allergy.
Any narrowing of the gastrointestinal (GI) tract or a bowel blockage.
Acidic blood conditions, such as acidosis.
* If you have type 1 diabetes, as this medication is not intended to treat this condition.

This list is not exhaustive, and it is crucial to discuss all your medications, including prescription and over-the-counter (OTC) drugs, natural products, and vitamins, with your doctor and pharmacist. They will help you determine if it is safe to take this medication with your other medications and health conditions.

Remember, do not start, stop, or change the dose of any medication without first consulting your doctor to ensure your safety.
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Precautions & Cautions

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. Before engaging in activities that require alertness, such as driving, wait until you understand how this drug affects you. Monitor your blood sugar levels as instructed by your doctor.

Regular blood tests will be necessary, as directed by your doctor. Be sure to discuss any concerns or questions with your doctor during these appointments. Additionally, inform all healthcare providers and laboratory personnel that you are taking this medication, as it may impact certain lab test results.

Adhere to the diet and exercise plan recommended by your doctor. If you experience low blood sugar, avoid driving, as this can increase your risk of being involved in an accident. It is also recommended to avoid consuming alcohol while taking this medication.

If you are taking colesevelam, take it at least 4 hours after taking this drug. Be aware that stress, such as fever, infection, injury, or surgery, can affect blood sugar control. Changes in physical activity, exercise, or diet may also impact blood sugar levels.

Individuals with low levels of the enzyme G6PD should exercise caution, as they may be more prone to anemia. This enzyme deficiency is more common in patients of African, South Asian, Middle Eastern, and Mediterranean descent.

There is an increased risk of death from heart disease associated with this medication. Discuss this risk with your doctor. Low blood sugar is a potential side effect, and severe cases can lead to seizures, loss of consciousness, long-term brain damage, and even death. Consult your doctor if you have concerns about low blood sugar.

If you are 65 or older, use this medication with caution, as you may be more susceptible to side effects. Pregnant or breastfeeding women should discuss the benefits and risks of this medication with their doctor. If you are planning to become pregnant, inform your doctor, as you will need to weigh the advantages and disadvantages of taking this medication.

You may notice the tablet shell in your stool, but this is a normal occurrence and not a cause for concern. However, if you are taking this medication during pregnancy, you will need to stop taking it before your due date to minimize the risk of low blood sugar in your infant. Consult your doctor for guidance on managing this risk.
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Overdose Information

Overdose Symptoms:

  • Severe hypoglycemia (very low blood sugar)
  • Confusion
  • Slurred speech
  • Seizures
  • Loss of consciousness
  • Coma

What to Do:

Immediately consume a source of fast-acting sugar. If the person is unconscious or unable to swallow, call 911 or emergency medical services. Glucagon injection may be necessary. Call 1-800-222-1222 (Poison Control) for further guidance.

Drug Interactions

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Major Interactions

  • Bosentan (increased risk of hepatotoxicity)
  • Miconazole (oral, IV, topical) - significantly increases glipizide levels and risk of severe hypoglycemia
  • Alcohol (acute ingestion) - increased risk of hypoglycemia and disulfiram-like reaction
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Moderate Interactions

  • Beta-blockers (mask hypoglycemia symptoms, impair glucose recovery)
  • NSAIDs (enhance hypoglycemic effect)
  • Salicylates (high doses, enhance hypoglycemic effect)
  • Sulfonamides (enhance hypoglycemic effect)
  • Chloramphenicol (enhance hypoglycemic effect)
  • Fluconazole (enhance hypoglycemic effect)
  • Probenecid (enhance hypoglycemic effect)
  • Coumarin derivatives (potentiate anticoagulant effect)
  • Corticosteroids (decrease hypoglycemic effect)
  • Thiazide diuretics (decrease hypoglycemic effect)
  • Phenothiazines (decrease hypoglycemic effect)
  • Thyroid products (decrease hypoglycemic effect)
  • Estrogens/Oral Contraceptives (decrease hypoglycemic effect)
  • Phenytoin (decrease hypoglycemic effect)
  • Nicotinic acid (decrease hypoglycemic effect)
  • Sympathomimetics (decrease hypoglycemic effect)
  • Calcium channel blockers (decrease hypoglycemic effect)
  • Isoniazid (decrease hypoglycemic effect)
  • Colesevelam (decreased glipizide absorption; administer glipizide at least 4 hours before colesevelam)
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Minor Interactions

  • Not available

Monitoring

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Baseline Monitoring

HbA1c (Glycated Hemoglobin)

Rationale: To establish baseline glycemic control and guide initial dosing.

Timing: Prior to initiation of therapy.

Fasting Plasma Glucose (FPG)

Rationale: To establish baseline glycemic control and guide initial dosing.

Timing: Prior to initiation of therapy.

Renal Function (e.g., eGFR, creatinine)

Rationale: To assess kidney function, as glipizide is primarily renally excreted and dose adjustments may be needed in impairment.

Timing: Prior to initiation of therapy.

Hepatic Function (e.g., ALT, AST, bilirubin)

Rationale: To assess liver function, as glipizide is extensively metabolized by the liver and dose adjustments may be needed in impairment.

Timing: Prior to initiation of therapy.

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Routine Monitoring

HbA1c (Glycated Hemoglobin)

Frequency: Every 3-6 months

Target: <7% (individualized based on patient factors)

Action Threshold: If HbA1c remains above target, consider dose adjustment or addition/change of therapy.

Self-Monitoring Blood Glucose (SMBG)

Frequency: Daily (frequency depends on patient and treatment regimen)

Target: FPG: 80-130 mg/dL; Postprandial: <180 mg/dL (individualized)

Action Threshold: Persistent readings outside target range, or frequent hypoglycemic episodes, warrant dose adjustment or re-evaluation of therapy.

Signs and Symptoms of Hypoglycemia

Frequency: Continuously

Target: N/A

Action Threshold: Immediate intervention (e.g., consume fast-acting carbohydrates) if symptoms occur. Review medication regimen.

Renal Function (e.g., eGFR, creatinine)

Frequency: Annually or more frequently if clinically indicated (e.g., in elderly or those with comorbidities)

Target: N/A

Action Threshold: Dose adjustment may be needed if renal function declines.

Hepatic Function (e.g., ALT, AST, bilirubin)

Frequency: Annually or more frequently if clinically indicated

Target: N/A

Action Threshold: Dose adjustment or discontinuation may be needed if hepatic function declines or liver injury is suspected.

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Symptom Monitoring

  • Sweating
  • Tremor
  • Palpitations
  • Anxiety
  • Hunger
  • Confusion
  • Dizziness
  • Headache
  • Irritability
  • Blurred vision
  • Slurred speech
  • Weakness
  • Seizures
  • Loss of consciousness

Special Patient Groups

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Pregnancy

Generally not recommended during pregnancy. Insulin is the preferred treatment for diabetes during pregnancy due to better glycemic control and lower risk of fetal hypoglycemia. Glipizide may cause severe neonatal hypoglycemia.

Trimester-Specific Risks:

First Trimester: Potential for teratogenicity, though data are limited and conflicting. Insulin is preferred.
Second Trimester: Risk of neonatal hypoglycemia if used near term. Insulin is preferred.
Third Trimester: High risk of severe and prolonged neonatal hypoglycemia if used, especially near delivery. Discontinue at least one month before expected delivery and switch to insulin.
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Lactation

Not recommended during breastfeeding. Glipizide is excreted into breast milk and may cause hypoglycemia in the nursing infant. Insulin is generally preferred for managing diabetes in lactating mothers.

Infant Risk: L4 (Possibly hazardous) - Risk of hypoglycemia in the infant.
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Pediatric Use

Safety and effectiveness have not been established in pediatric patients. Use is not recommended.

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Geriatric Use

Use with caution in elderly patients due to increased risk of hypoglycemia, particularly in those with impaired renal or hepatic function. Start with a lower dose (e.g., 2.5 mg) and titrate slowly. Monitor blood glucose closely.

Clinical Information

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Clinical Pearls

  • Always instruct patients to take Glucotrol XL with their first main meal of the day (usually breakfast) to optimize absorption and reduce the risk of hypoglycemia.
  • Emphasize the importance of consistent meal times and carbohydrate intake to prevent blood sugar fluctuations.
  • Educate patients thoroughly on the signs and symptoms of hypoglycemia and how to treat it promptly.
  • Be aware of drug interactions, especially with medications that can potentiate or diminish glipizide's hypoglycemic effect (e.g., beta-blockers, NSAIDs, fluconazole, corticosteroids).
  • Consider alternative agents in patients with significant renal or hepatic impairment, or use with extreme caution and close monitoring.
  • Glipizide ER tablets are designed to be swallowed whole and should not be chewed, crushed, or divided, as this can alter the extended-release properties and lead to rapid drug release and potential hypoglycemia.
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Alternative Therapies

  • Metformin
  • Other sulfonylureas (e.g., glimepiride, glyburide)
  • DPP-4 inhibitors (e.g., sitagliptin, saxagliptin)
  • SGLT2 inhibitors (e.g., empagliflozin, dapagliflozin)
  • GLP-1 receptor agonists (e.g., liraglutide, semaglutide)
  • Thiazolidinediones (e.g., pioglitazone)
  • Insulin therapy
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Cost & Coverage

Average Cost: Varies, typically $10-$50 per 30 tablets
Generic Available: Yes
Insurance Coverage: Tier 1 or 2 (preferred generic)
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General Drug Facts

If your symptoms or health issues persist or worsen, it is essential to contact your doctor promptly. To ensure safe and effective treatment, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so it's a good idea to check with your pharmacist for more information. If you have any questions or concerns about this medication, don't hesitate to discuss them with your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When seeking help, be prepared to provide details about the medication taken, the amount, and the time it happened.