Metformin + Glipizide Pharmacology

Metformin + Glipizide

About Metformin + Glipizide
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Mechanism of Action of Metformin + Glipizide
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Pharmacokinets of Metformin + Glipizide
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Onset of Action for Metformin + Glipizide
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Duration of Action for Metformin + Glipizide
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Half Life of Metformin + Glipizide
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Side Effects of Metformin + Glipizide
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Contra-indications of Metformin + Glipizide
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Special Precautions while taking Metformin + Glipizide
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Pregnancy Related Information
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Old Age Related Information
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Breast Feeding Related Information
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Children Related Information
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Indications for Metformin + Glipizide
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Interactions for Metformin + Glipizide
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Typical Dosage for Metformin + Glipizide
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Schedule of Metformin + Glipizide
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Storage Requirements for Metformin + Glipizide
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Effects of Missed Dosage of Metformin + Glipizide
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Effects of Overdose of Metformin + Glipizide
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Metformin

About Metformin
Biguanide derivative, Oral anti-diabetic.
Mechanism of Action of Metformin
It is a biguanide which exerts antidiabetic action. The drug suppresses gluconeogenesis in liver and thus suppresses hepatic glucose output. It enhance insulin mediated glucose disposal in muscle and adipose tissue. It enhance GLUT1 (glucose transporter-1) transport from intracellular site to plasma membrane. It also interferes with respiratory chain in mitochondria and promotes peripheral glucose utilization by increasing anaerobic glycolysis. It inhibits intestinal absorption of glucose, other hexose sugars, amino acids and vitamin B12. It also improves lipid profile in type-2 diabetics.
Pharmacokinets of Metformin
Absorption: Absorbed orally and bioavailability is about 50% to60%. Distribution: It is distributed in to erythrocytes, Metabolism: Not metabolized in the body, Excretion: Excreted mainly through urine.
Onset of Action for Metformin
N/A
Duration of Action for Metformin
6 to 8 hours
Half Life of Metformin
1.5 to 3hours
Side Effects of Metformin
1. Abdominal pain
2. Nausea
3. Vomiting
4. Anorexia
5. Metalic taste
6. Mild diarrhea
7. Tiredness
8. Small increase in blood lactate
9. Lactic acidosis (rare)
10. Vitamin B12 deficiency
11. Megaloblastic anaemia
12. Diarrhoea
13. Flatulence
14. Dermatitis
15. Rashes.
Contra-indications of Metformin
1. Hypersensitivity to the drug
2. Renal impairment
3. Hepatic impairment
4. Diabetic ketoacidosis
5. Cardiovascular collapse
6. Hypotensive states
7. Respiratory disease
8. Alcoholics.
Special Precautions while taking Metformin
1. Alcohol intake can precipitate severe lactic acidosis
2. Vitamin B12deficiency
3. In malnourished and deliberate individuals
4. Adrenal insufficiency
5. Pituitary insufficiency.
Pregnancy Related Information
Contraindicated
Old Age Related Information
Use with caution
Breast Feeding Related Information
Contraindicated
Children Related Information
Contraindicated
Indications for Metformin
Non-insulin dependent diabetes mellitus (as adjunct to diet and exercise).
Interactions for Metformin
N/A
Typical Dosage for Metformin
Adults: Initial dose: 250mg twice or thrice daily with meals. Increase gradually at 2 week intervals, if required to a maximum of 3g daily.
Children: Not applicable.
Schedule of Metformin
G
Storage Requirements for Metformin
Store at room temperature at a range of 15 to 30 degree C. in a well closed container.Keep out of reach of children.
Effects of Missed Dosage of Metformin
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose
Effects of Overdose of Metformin
Provide supportive measures and symptomatic treatment. Remove accumulated drug from the body by haemodialysis.

Glipizide

About Glipizide
Second generation sulfonylurea, Pyrazine derivative, Medium-to-long acting Oral Antidiabetic Agent.
Mechanism of Action of Glipizide
It is a potent antidiabetic drug which exerts it`s action by increasing insulin release from the pancreas and by improving glucose tolerance. It acts on the "sulfonylurea receptors" on pancreatic ?-cell membrane and reduces conductance of ATP sensitive K+ channels and thus causes depolarization. This enhances Ca2+ influx and degranultion and thus increases insulin secretion rate at any glucose concentration. It primarily increases 2nd phase insulin secretion and has little effect on 1st phase. It also slows hepatic degradation of insulin and minor action of reducing glucagon release and increasing Somatostatin release. It also exerts extrapancreatic action; by sensitizing the target tissues such as liver to insulin action. It increases the number of insulin receptors and through a post receptor action improving translation of receptor activation.
Pharmacokinets of Glipizide
Absorption: Well absorbed orally.
Distribution: Distributed in a protein bound form.
Metabolism: Completely metabolized in to inactive metabolites in liver.
Excretion: Excreted mainly through urine and also through faeces as metabolites.
Onset of Action for Glipizide
60 to 90 minutes
Duration of Action for Glipizide
12 to 18 hours
Half Life of Glipizide
3 to 5 hours
Side Effects of Glipizide
1. Hypoglycemia
2. Nausea
3. Vomiting
4. Diarrhoea
5. Constipation
6. Headache
7. Paresthesia
8. Hypersensitivity reactions
9. Rashes
10. Photosensitivity
11. Purpura
12. Transient leucopenia
13. Agranulocytosis
Contra-indications of Glipizide
1. Hypersensitivity to the drug
2. Diabetic ketoacidosis
3. Diabetic coma
4. Renal impairment
5. Hepatic impairment
6. Juvenile diabetes mellitus
7. Stress
Special Precautions while taking Glipizide
1. Malnourished and deliberate individuals
2. Strenous exercise and irregular meals may leads to hypoglycemia
3. Hepatic diseases
4. Renal diseases
Pregnancy Related Information
Contraindicated
Old Age Related Information
Use with caution
Breast Feeding Related Information
Contraindicated
Children Related Information
Contraindicated
Indications for Glipizide
1. Non insulin dependent diabetes mellitus.
Interactions for Glipizide
Hypoglycaemic effect of glipizide is enhanced by: Anticoagulants, Androgens, Chloramphenicol, Clofibrate, Fenfluramine, Fluconazole, Gemfibrozil, Histamine H2 antagonists, Magnesium Salts, Methyldopa, MAOIs, Phenylbutazone, Probenecid, Salicylates, Sulfinpyrazone, Sulfonamides, TCAs, & Urinary acidifiers.
Hypoglycemic effect of glipizide inhibited by the following drugs: Beta-blockers, Cholestyramine, Diazoxide, Hydantoins, Rifampicin, Thiazide diuretics & Urinary alkalisers.
Charcoal: Reduces the absorption of glipizide thus reducing its efficacy or toxicity.
Digitalis glycosides: Coadministration results in increased digitalis serum levels.

Typical Dosage for Glipizide
Oral: Starts with 2.5 to 5mg daily; 30 minutes prior to breakfast. Adjust the dosage by increments of 2.5 to 5mg at weekly intervals up to 15mg/day as required.
Schedule of Glipizide
N/A
Storage Requirements for Glipizide
Store at room temperature at a range of 15 to 30 degree C. in a well closed container. Protect from excess heat and moisture. Keep out of reach of children.
Effects of Missed Dosage of Glipizide
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose.
Effects of Overdose of Glipizide
Mild hypoglycemia can be treated with oral glucose and dosage adjustment. It there is loss of consciousness or neurological findings the patient should receive rapid injection of dextrose 50%; followed by continuous infusion of dextrose 10% at a rate to maintain blood glucose levels greater than 100mg/dl. Monitor patient for 24 to 48 hours.

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Metformin + Glipizide is a generic medicine name and there are several brands available for it. Some of the brands for metformin + glipizide might be better known than metformin + glipizide itself. If the pharmacy that's willing to deliver medicines to your home doesn't have metformin + glipizide in stock, you can ask for one of the branded alternatives for metformin + glipizide.