Sitagliptin 50mg Tablets

Manufacturer ZYDUS PHARMACEUTICALS (USA) Active Ingredient Sitagliptin Tablets(sit a GLIP tin) Pronunciation sit a GLIP tin
It is used to help control blood sugar in people with type 2 diabetes.
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Drug Class
Antidiabetic
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Pharmacologic Class
Dipeptidyl Peptidase-4 (DPP-4) Inhibitor
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Pregnancy Category
Category B
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FDA Approved
Oct 2006
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Sitagliptin is a medication used to help control blood sugar levels in adults with type 2 diabetes. It works by helping your body make more insulin when your blood sugar is high and by reducing the amount of sugar your liver makes. It's usually taken once a day.
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How to Use This Medicine

Taking Your Medication

To use this medication correctly, follow your doctor's instructions and read all the information provided. Take your medication with or without food, as directed. It's essential to continue taking this medication as prescribed by your doctor or healthcare provider, even if you're feeling well.

Storing and Disposing of Your Medication

For all tablet products, store them at room temperature in a dry place, avoiding the bathroom. Specifically for Zituvio:

Missing 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.
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Lifestyle & Tips

  • Sitagliptin works best when combined with a healthy diet and regular exercise.
  • Follow your healthcare provider's recommendations for diet and physical activity.
  • Monitor your blood sugar levels regularly as instructed by your doctor.
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Available Forms & Alternatives

Dosing & Administration

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Adult Dosing

Standard Dose: 100 mg orally once daily
Dose Range: 25 - 100 mg

Condition-Specific Dosing:

monotherapy: 100 mg once daily
combination_therapy: 100 mg once daily
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Pediatric Dosing

Neonatal: Not established
Infant: Not established
Child: Not established
Adolescent: Not established (Safety and effectiveness not established in pediatric patients under 18 years of age)
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Dose Adjustments

Renal Impairment:

Mild: No dose adjustment (eGFR β‰₯ 45 mL/min/1.73 mΒ²)
Moderate: 50 mg orally once daily (eGFR β‰₯ 30 to < 45 mL/min/1.73 mΒ²)
Severe: 25 mg orally once daily (eGFR < 30 mL/min/1.73 mΒ²)
Dialysis: 25 mg orally once daily (regardless of dialysis type); may be administered without regard to timing of dialysis

Hepatic Impairment:

Mild: No dose adjustment
Moderate: No dose adjustment
Severe: No dose adjustment (based on pharmacokinetic studies, no dose adjustment is necessary)

Pharmacology

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Mechanism of Action

Sitagliptin is a dipeptidyl peptidase-4 (DPP-4) inhibitor. It works by inhibiting the inactivation of incretin hormones, such as glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP). By increasing the levels of active incretin hormones, sitagliptin enhances glucose-dependent insulin release from pancreatic beta cells and decreases glucagon secretion from pancreatic alpha cells, leading to improved glycemic control in patients with type 2 diabetes.
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Pharmacokinetics

Absorption:

Bioavailability: Approximately 87%
Tmax: 1 to 4 hours
FoodEffect: No clinically meaningful effect of food on sitagliptin pharmacokinetics

Distribution:

Vd: Approximately 198 liters
ProteinBinding: Approximately 79%
CnssPenetration: Limited

Elimination:

HalfLife: Approximately 12.4 hours
Clearance: Approximately 350 mL/min (renal clearance ~250 mL/min)
ExcretionRoute: Renal (primary), Fecal
Unchanged: Approximately 79% (renal)
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Pharmacodynamics

OnsetOfAction: Rapid (within hours)
PeakEffect: Within 1-4 hours (corresponding to Tmax)
DurationOfAction: 24 hours (allows for once-daily dosing)

Safety & Warnings

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Side Effects

Urgent Side Effects: Seek Medical Help Right Away

Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor or seek medical attention immediately:

Allergic Reaction: 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, or swelling of the mouth, face, lips, tongue, or throat.
Severe Skin Reaction (Stevens-Johnson Syndrome): Red, swollen, blistered, or peeling skin (with or without fever), red or irritated eyes, or sores in the mouth, throat, nose, or eyes.
Kidney Problems: Inability to pass urine, changes in urine output, blood in the urine, or sudden weight gain.
Heart Failure: If you have a history of heart failure or kidney problems, inform your doctor. Seek medical help right away if you experience extreme fatigue, shortness of breath, sudden weight gain, or swelling in the arms or legs.
Low Blood Sugar: Dizziness, headache, feeling sleepy or weak, shaking, fast heartbeat, confusion, hunger, or sweating. If you experience any of these symptoms, contact your doctor immediately and follow their instructions for managing low blood sugar, which may include taking glucose tablets, liquid glucose, or consuming certain fruit juices.
Pancreas Problems (Pancreatitis): Severe stomach pain, severe back pain, or severe nausea and vomiting. Seek medical help right away if you experience any of these symptoms.
Skin Reaction (Bullous Pemphigoid): Blisters or skin breakdown. Contact your doctor immediately if you notice any of these symptoms.
Joint Pain: Severe and disabling joint pain. Seek medical help right away if you experience persistent or severe joint pain.

Other Possible Side Effects

While many people may not experience side effects or may only have mild side effects, it's essential to be aware of the following:

Headache
Common cold symptoms
* Nose or throat irritation

If you experience any of these side effects or any other symptoms that bother you or do not go away, contact your doctor for guidance. 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:

  • Severe, persistent stomach pain (with or without vomiting) – could be a sign of pancreatitis. Seek immediate medical attention.
  • Severe and disabling joint pain – report to your doctor.
  • Blisters or erosions on the skin – could be a sign of bullous pemphigoid. Report to your doctor.
  • Shortness of breath, swelling in legs or feet, rapid weight gain – could be signs of heart failure. Seek medical attention.
  • Symptoms of a serious allergic reaction (e.g., rash, hives, swelling of face/lips/tongue/throat, difficulty breathing or swallowing) – seek immediate medical attention.
  • Symptoms of low blood sugar (hypoglycemia) such as sweating, shaking, dizziness, confusion, hunger, fast heartbeat (especially if taking with insulin or sulfonylurea). Know how to treat low blood sugar.
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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, including any symptoms that occurred.
If you have type 1 diabetes, as this medication is not intended to treat this condition.

This medication may interact with other medications or health conditions. Therefore, it is crucial to provide your doctor and pharmacist with a comprehensive list of:

All prescription and over-the-counter (OTC) medications you are taking
Any natural products or vitamins you are using
* Your health problems, including any medical conditions or diseases

Before starting, stopping, or changing the dose of any medication, including this one, you must consult with your doctor to ensure your safety. It is your responsibility to verify that it is safe to take this medication with all your other medications and health conditions.
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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.

If you experience low blood sugar, do not operate a vehicle, as this increases your risk of being involved in an accident.

Monitor your blood sugar levels as directed by your doctor. Additionally, have your blood work checked as instructed by your doctor and discuss the results with them.

Before consuming alcohol, consult with your doctor to ensure safe consumption.

Adhere to the diet and exercise plan recommended by your doctor to maintain optimal blood sugar control. Be aware that stress, such as fever, infection, injury, or surgery, can affect blood sugar levels. Changes in physical activity, exercise, or diet can also impact blood sugar control.

Kidney problems, which may require hospitalization or dialysis, have been associated with this medication.

If you are 65 years or older, use this medication with caution, as you may be more susceptible to side effects.

If you are pregnant, plan to become pregnant, or are breastfeeding, inform your doctor. It is crucial to discuss the potential benefits and risks of this medication to both you and your baby.
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Overdose Information

Overdose Symptoms:

  • Hypoglycemia (if co-administered with sulfonylurea or insulin)
  • Gastrointestinal upset
  • Renal impairment (theoretical)

What to Do:

In the event of an overdose, it is reasonable to employ the usual supportive measures (e.g., remove unabsorbed material from the GI tract, employ clinical monitoring, and institute supportive treatment as dictated by the patient’s clinical status). Sitagliptin is modestly dialyzable. Call 1-800-222-1222 (Poison Control Center) or seek emergency medical attention.

Drug Interactions

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Moderate Interactions

  • Digoxin (Sitagliptin may cause a slight increase in digoxin concentrations; monitor digoxin levels if co-administered)
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Minor Interactions

  • Cyclosporine (Cyclosporine may slightly increase sitagliptin exposure, but no dose adjustment is needed)

Monitoring

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Baseline Monitoring

HbA1c

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

Timing: Prior to initiation of therapy

Renal function (eGFR)

Rationale: To determine appropriate starting dose and identify need for dose adjustment.

Timing: Prior to initiation of therapy

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Routine Monitoring

HbA1c

Frequency: Every 3-6 months

Target: Individualized, typically <7% for most adults

Action Threshold: If target not met, consider dose adjustment or addition/change of therapy

Renal function (eGFR)

Frequency: At least annually, or more frequently in patients with known renal impairment or risk factors for renal decline

Target: Not applicable (monitor for decline)

Action Threshold: If eGFR falls below 45 mL/min/1.73 mΒ², adjust sitagliptin dose accordingly

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Symptom Monitoring

  • Symptoms of pancreatitis (e.g., severe, persistent abdominal pain, radiating to the back, with or without vomiting)
  • Symptoms of severe arthralgia (e.g., severe and disabling joint pain)
  • Symptoms of bullous pemphigoid (e.g., blisters or erosions on the skin)
  • Symptoms of heart failure (e.g., increasing shortness of breath, rapid weight gain, swelling in the legs/feet)
  • Symptoms of hypoglycemia (especially when used with sulfonylurea or insulin)
  • Symptoms of hypersensitivity reactions (e.g., rash, urticaria, angioedema)

Special Patient Groups

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Pregnancy

Sitagliptin is Pregnancy Category B. Animal studies have shown no evidence of harm to the fetus. However, there are no adequate and well-controlled studies in pregnant women. Use during pregnancy only if clearly needed and the potential benefit justifies the potential risk to the fetus.

Trimester-Specific Risks:

First Trimester: Limited human data; animal studies show no teratogenicity.
Second Trimester: Limited human data.
Third Trimester: Limited human data.
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Lactation

Sitagliptin is excreted in the milk of lactating rats. It is not known whether sitagliptin is excreted in human milk. Due to the potential for serious adverse reactions in a breastfed infant, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother. Lactation Risk Category L3 (Limited data – possible risk).

Infant Risk: Potential for unknown adverse effects; monitor infant for signs of hypoglycemia or other adverse reactions.
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Pediatric Use

Safety and effectiveness have not been established in pediatric patients under 18 years of age. Not recommended for use in this population.

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Geriatric Use

No dose adjustment is necessary based on age alone. However, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy. Renal function should be assessed prior to initiation and periodically thereafter.

Clinical Information

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Clinical Pearls

  • Sitagliptin is generally well-tolerated and has a low risk of hypoglycemia when used as monotherapy or in combination with metformin or thiazolidinediones.
  • Increased risk of hypoglycemia when combined with sulfonylureas or insulin; a dose reduction of the sulfonylurea or insulin may be required.
  • Postmarketing reports of acute pancreatitis, sometimes fatal, have been observed. Patients should be informed of the characteristic symptom of acute pancreatitis: persistent, severe abdominal pain.
  • Cases of severe and disabling arthralgia (joint pain) have been reported. Consider discontinuing the drug if severe joint pain develops.
  • Postmarketing reports of bullous pemphigoid have been observed. If bullous pemphigoid is suspected, sitagliptin should be discontinued.
  • Heart failure has been reported with some DPP-4 inhibitors; monitor patients for signs and symptoms of heart failure.
  • Not indicated for patients with type 1 diabetes or for the treatment of diabetic ketoacidosis.
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Alternative Therapies

  • Other DPP-4 inhibitors (e.g., Saxagliptin, Linagliptin, Alogliptin)
  • GLP-1 Receptor Agonists (e.g., Liraglutide, Semaglutide)
  • SGLT2 Inhibitors (e.g., Canagliflozin, Dapagliflozin, Empagliflozin)
  • Sulfonylureas (e.g., Glipizide, Glyburide, Glimepiride)
  • Metformin
  • Thiazolidinediones (e.g., Pioglitazone, Rosiglitazone)
  • Insulin
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Cost & Coverage

Average Cost: Varies, typically $400-$600 per 30 tablets (100mg)
Generic Available: Yes
Insurance Coverage: Tier 2 or Tier 3 (preferred brand or 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 use, never share your medication with others or take someone else's medication. This medication is accompanied by a Medication Guide, which provides crucial information for patients. Please read this guide carefully and review it again whenever you receive a refill of this medication. If you have any questions or concerns about this medication, consult your doctor, pharmacist, or other healthcare provider for guidance. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When reporting the incident, be prepared to provide details about the medication taken, the quantity, and the time it occurred.