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Pharmacotherapy of Type 2
Diabetes Mellitus
Dr. Prerna Singh
Junior resident
Department of Pharmacology
JNMCH, AMU
Introduction
 Diabetes mellitus refers to a group of metabolic disorders
that share a common phenotype of hyperglycemia
-Harrison’s Principles of internal medicine
 4types-
 Type 1- IDDM
 Type 2 -NIDDM
 Type 3- Other specific types
 Type 4 – Gestational DM
Pathogenesis
 Genetic
 Insulin resistance
 High fasting blood glucose
 High insulin
 High pro insulin
 Number of beta cell less
 Excess glucagon
Diagnostic criteria
Blood glucose Fasting (mg/dl) 2hour PP (mg/dl)
Normal <100 <140
Impaired fasting glucose 100-125 <140
Impaired glucose tolerance <100 140- 199
Diabetes Mellitus ≧ 126 ≧ 200
Random blood glucose of ≧ 200 along with signs and symptoms
of DM
OR HbA1c > 6.5 is also diagnostic
Plasma glucose and HbA1c targets
Plasma glucose Good Acceptable
Fasting <100 120-140
Post prandial <140 140-180
HbA1c <6 6-7.5
Treatment components
 Patient education
 Diet and exercise
 Pharmacological therapy
 Treat comorbidities
 Screen for complications
Pharmacological therapy
Classification of antidiabetics
• First generation: Tolbutamide, Chlorpropamide
• Second generation: Glibenclamide, Glipizide, Gliclazide, Glimerpiride
Sulfonylureas:
Meglitinides: Repaglinide, Nateglinide
Biguanides: Metformin
Thiazolidinediones:Pioglitazone
Alpha glucosidase inhibitors: Acarbose, Miglitol, Voglibose
Incretin mimetics: Exenatide, Liraglutide, Albiglutide, Dulaglutide
DPP-IV inhibitors: Sitagliptin, Vildagliptin, Saxagliptin, Linagliptin, Alogliptin
Amylin mimetics: Pramlinitide
SGLT 2 inhibitors: Dapagliflozin, Canagliflozin, Empagliflozin
Sulfonylureas
Tolbutamide, Chlorpropamide, Glibenclamide, Glipizide (5-40mg/day), Glyburide (1.25- 20mg/day),
Glimerpiride (1-8mg)
Sulfonylureas
 Taken before food, OD
Side effect:
 Hypoglycemia
 Weight gain
 Can cross placenta
 Disulfiram like reaction with alcohol
Caution in renal and hepatic failure patients
Meglitinides
Repaglinide (0.5-16mg/day), Nateglinide (180-360mg/day)
 Same mechanism as sulfonylureas
 Short acting – to be taken just before meals (1- 10 minutes)
 Act on beta cells to increase insulin release
 Hypoglycemia risk
 Can cause weight gain
Biguanides
Metformin (500mg-1g BD)
 Act on mitochondrial respiration: ↓ATP & ↑ AMP ➝ Activation of AMPK
 Stimulation of fatty acid oxidation
 Non oxidative glucose metabolism
 Increase glucose uptake by muscle
 Inhibit gluconeogenesis
 Suppress lipogenesis
 Slows absorption of glucose form GIT
 Promote binding of insulin to its receptor
Side effect
 Nausea
 Anorexia
 Metallic taste
 Diarrhea
 Lactic acidosis
 Vitamin B12 deficiency
CAUTION: GFR<30ml/min/1.73m2
Biguanides
 First line in T2DM
 Preferred in obese patient
 Cost effective
 No risk of hypoglycemia
 Assess renal function before starting, monitor annually
Biguanides
Thiazolidinediones
Pioglitazone (15- 45 mg/ day OD)
 PPAR  agonist- this increases insulin sensitivity and
decrease resistance to insulin (insulin sensitizers)
 Decrease gluconeogenesis
 Increase GLUT-4 transporter
 Onset is slow:1- 3 months to achieve euglycemia
 Increase HDL
 Decrease Triglycerides
 Weight gain and edema (fluid retention)
 Anemia due to hemodilution
 Hepatotoxic
 High incidence of heart failure
 Pioglitazone is associated with bladder cancer
 Avoid in osteoporosis
Thiazolidinediones
Alpha glucosidase inhibitors
Acarbose (25- 100mg), Miglitol (25- 100mg), Voglibose
 Inhibit Alpha glucosidase enzyme which is responsible for digestion
of complex starch and hence prevents absorption of glucose
 Increase release of GLP-1
 Prevent post prandial hyperglycemia- Before meal dosing
Side effect
 Diarrhea
 Flatulence
 Pain abdomen
Incretin mimetics
Exenatide (5-10mcg BD), Liraglutide (0.6-1.8mg OD), Albiglutide (30-50 mg weekly),
Dulaglutide
 Increase glucose dependent insulin secretion
 Control PP
Side effect
Nausea
Anorexia – weight loss
Pancreatitis
 Only injectables –SC
 No risk of hypoglycemia
DPP IV inhibitors
Sitagliptin, Vildagliptin (50 mg OD/BD), Saxagliptin (100mg/day), Linagliptin (5mg/day),
Alogliptin (25mg/day)
 Inhibit metabolism of incretins (GLP1, GIP)
 DPP IV enzyme is responsible for metabolism of incretins
which increase insulin release.
 No effect on weight
 Increase risk of heart failure with saxagliptin
Amylin mimetics
Pramlintide ( 60-120 mcg/day)
 Act on amylin receptor in hind brain
 Inhibit glucagon secretion
 Delay gastric emptying
 Decrease appetite
 Subcutaneously before meals
 Added to decrease insulin requirement
 Should not be mixed in same syringe - different pH
 Risk of hypoglycemia with insulin
SGLT 2 inhibitors
Dapagliflozin (8-10mg/day), Canagliflozin (100-300mg/day), Empagliflozin (10-25mg/day)
 Inhibit glucose reabsorption thereby increasing glucose
excretion
 Urinary tract infection
 Sodium loss in urine
 Low risk of hypoglycaemia
 Increase risk of fracture – affect PTH, vitamin D
Insulin in Type 2 DM
 Newly diagnosed HbA1c >10 or FBS> 260
 Onset before 30 years age
 Long standing diabetes
 Complications
 Pregnancy
 Surgical procedures
 Failure following oral therapy
Insulin side effects
 Hypoglycemia
 Allergy
 Lipodystrophy
 Obesity
 Neuropathy
Available insulin
Short acting
Regular
Ultra short acting
Lispro
Aspart
Glulisine
Intermediate
acting
NPH
Long acting
Glargine
Detemir
Onset of action 30- 60 minutes 5-15 minutes 2-4 hours 2-4 hours
Duration of
action
8-10 hours 2- 5 hours 18- 24 hours Glargine – 24
hours
Detemir - 12 hour
Route SC/IV/IM SC/IV/IM SC SC
Dosing 30- 45 min
before meal
15 min before meal OD at bedtime OD
Dose: 0.6-0.7 IU/kg – 40% basal, rest premeal insulin
• Combination
therapy (2) ±
insulin
• 3 drugs
therapy ±
insulin
• Monotherapy or
Low dose
combination Or
insulin
• Diet and
exercise
Initial
treatment
HbA1c 6.5-
7.5
HbA1c 7.5- 9
HbA1c >9
Asymptomatic
patient
If poor response even after 3 drugs
HbA1c >9 symptomatic patient
Complications
Insulin
Individualize therapy
To reduce PP hyperglycemia DPP IV inhibitor
Alpha glucosidase inhibitors
Meglitinides
Liraglutide
Renal failure Repaglinide
DPP 4 inhibitors
Glitazones
Metformin( if GFR <30 ml/min),
Sulfonylurea contraindicated
Hepatic disease Avoid metformin , Glitazones and
DPP-4 inhibitors
CAD GLP-1 agonist preferred
Avoid – Glitazones
Basal insulin
 Single dose long acting insulin like NPH Glargine, degludec,
detemir before breakfast (hepatic glucose production) with
Oral drug (PP hyperglycemia)
Basal bolus regimen
• Increase 2-5 units every 3 day
till pre dinner sugar normal
•Regular insulin is added to long
acting insulin
•Day profiling is done
• 5-10 units regular insulin added
to morning dose
If pre lunch high
• Regular insulin given before
dinner
If hyperglycemia at bedtime
• Add NPH at bedtimeNext morning hyperglycemia
Day profiling
 Fasting
 Before lunch
 Before dinner
 Bed time
Premixed insulin
 Mixture of regular and NPH
 30:70 BBF and before dinner
 BETTER COMPLIANCE
THANK YOU 🙂

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Type 2 diabetes

  • 1. Pharmacotherapy of Type 2 Diabetes Mellitus Dr. Prerna Singh Junior resident Department of Pharmacology JNMCH, AMU
  • 2. Introduction  Diabetes mellitus refers to a group of metabolic disorders that share a common phenotype of hyperglycemia -Harrison’s Principles of internal medicine  4types-  Type 1- IDDM  Type 2 -NIDDM  Type 3- Other specific types  Type 4 – Gestational DM
  • 3. Pathogenesis  Genetic  Insulin resistance  High fasting blood glucose  High insulin  High pro insulin  Number of beta cell less  Excess glucagon
  • 4.
  • 5. Diagnostic criteria Blood glucose Fasting (mg/dl) 2hour PP (mg/dl) Normal <100 <140 Impaired fasting glucose 100-125 <140 Impaired glucose tolerance <100 140- 199 Diabetes Mellitus ≧ 126 ≧ 200 Random blood glucose of ≧ 200 along with signs and symptoms of DM OR HbA1c > 6.5 is also diagnostic
  • 6. Plasma glucose and HbA1c targets Plasma glucose Good Acceptable Fasting <100 120-140 Post prandial <140 140-180 HbA1c <6 6-7.5
  • 7. Treatment components  Patient education  Diet and exercise  Pharmacological therapy  Treat comorbidities  Screen for complications
  • 9. Classification of antidiabetics • First generation: Tolbutamide, Chlorpropamide • Second generation: Glibenclamide, Glipizide, Gliclazide, Glimerpiride Sulfonylureas: Meglitinides: Repaglinide, Nateglinide Biguanides: Metformin Thiazolidinediones:Pioglitazone Alpha glucosidase inhibitors: Acarbose, Miglitol, Voglibose Incretin mimetics: Exenatide, Liraglutide, Albiglutide, Dulaglutide DPP-IV inhibitors: Sitagliptin, Vildagliptin, Saxagliptin, Linagliptin, Alogliptin Amylin mimetics: Pramlinitide SGLT 2 inhibitors: Dapagliflozin, Canagliflozin, Empagliflozin
  • 10. Sulfonylureas Tolbutamide, Chlorpropamide, Glibenclamide, Glipizide (5-40mg/day), Glyburide (1.25- 20mg/day), Glimerpiride (1-8mg)
  • 11. Sulfonylureas  Taken before food, OD Side effect:  Hypoglycemia  Weight gain  Can cross placenta  Disulfiram like reaction with alcohol Caution in renal and hepatic failure patients
  • 12. Meglitinides Repaglinide (0.5-16mg/day), Nateglinide (180-360mg/day)  Same mechanism as sulfonylureas  Short acting – to be taken just before meals (1- 10 minutes)  Act on beta cells to increase insulin release  Hypoglycemia risk  Can cause weight gain
  • 13. Biguanides Metformin (500mg-1g BD)  Act on mitochondrial respiration: ↓ATP & ↑ AMP ➝ Activation of AMPK  Stimulation of fatty acid oxidation  Non oxidative glucose metabolism  Increase glucose uptake by muscle  Inhibit gluconeogenesis  Suppress lipogenesis  Slows absorption of glucose form GIT  Promote binding of insulin to its receptor
  • 14. Side effect  Nausea  Anorexia  Metallic taste  Diarrhea  Lactic acidosis  Vitamin B12 deficiency CAUTION: GFR<30ml/min/1.73m2 Biguanides
  • 15.  First line in T2DM  Preferred in obese patient  Cost effective  No risk of hypoglycemia  Assess renal function before starting, monitor annually Biguanides
  • 16. Thiazolidinediones Pioglitazone (15- 45 mg/ day OD)  PPAR  agonist- this increases insulin sensitivity and decrease resistance to insulin (insulin sensitizers)  Decrease gluconeogenesis  Increase GLUT-4 transporter  Onset is slow:1- 3 months to achieve euglycemia
  • 17.  Increase HDL  Decrease Triglycerides  Weight gain and edema (fluid retention)  Anemia due to hemodilution  Hepatotoxic  High incidence of heart failure  Pioglitazone is associated with bladder cancer  Avoid in osteoporosis Thiazolidinediones
  • 18. Alpha glucosidase inhibitors Acarbose (25- 100mg), Miglitol (25- 100mg), Voglibose  Inhibit Alpha glucosidase enzyme which is responsible for digestion of complex starch and hence prevents absorption of glucose  Increase release of GLP-1  Prevent post prandial hyperglycemia- Before meal dosing Side effect  Diarrhea  Flatulence  Pain abdomen
  • 19. Incretin mimetics Exenatide (5-10mcg BD), Liraglutide (0.6-1.8mg OD), Albiglutide (30-50 mg weekly), Dulaglutide  Increase glucose dependent insulin secretion  Control PP Side effect Nausea Anorexia – weight loss Pancreatitis  Only injectables –SC  No risk of hypoglycemia
  • 20. DPP IV inhibitors Sitagliptin, Vildagliptin (50 mg OD/BD), Saxagliptin (100mg/day), Linagliptin (5mg/day), Alogliptin (25mg/day)  Inhibit metabolism of incretins (GLP1, GIP)  DPP IV enzyme is responsible for metabolism of incretins which increase insulin release.  No effect on weight  Increase risk of heart failure with saxagliptin
  • 21. Amylin mimetics Pramlintide ( 60-120 mcg/day)  Act on amylin receptor in hind brain  Inhibit glucagon secretion  Delay gastric emptying  Decrease appetite  Subcutaneously before meals  Added to decrease insulin requirement  Should not be mixed in same syringe - different pH  Risk of hypoglycemia with insulin
  • 22. SGLT 2 inhibitors Dapagliflozin (8-10mg/day), Canagliflozin (100-300mg/day), Empagliflozin (10-25mg/day)  Inhibit glucose reabsorption thereby increasing glucose excretion  Urinary tract infection  Sodium loss in urine  Low risk of hypoglycaemia  Increase risk of fracture – affect PTH, vitamin D
  • 23. Insulin in Type 2 DM  Newly diagnosed HbA1c >10 or FBS> 260  Onset before 30 years age  Long standing diabetes  Complications  Pregnancy  Surgical procedures  Failure following oral therapy
  • 24.
  • 25. Insulin side effects  Hypoglycemia  Allergy  Lipodystrophy  Obesity  Neuropathy
  • 26. Available insulin Short acting Regular Ultra short acting Lispro Aspart Glulisine Intermediate acting NPH Long acting Glargine Detemir Onset of action 30- 60 minutes 5-15 minutes 2-4 hours 2-4 hours Duration of action 8-10 hours 2- 5 hours 18- 24 hours Glargine – 24 hours Detemir - 12 hour Route SC/IV/IM SC/IV/IM SC SC Dosing 30- 45 min before meal 15 min before meal OD at bedtime OD Dose: 0.6-0.7 IU/kg – 40% basal, rest premeal insulin
  • 27. • Combination therapy (2) ± insulin • 3 drugs therapy ± insulin • Monotherapy or Low dose combination Or insulin • Diet and exercise Initial treatment HbA1c 6.5- 7.5 HbA1c 7.5- 9 HbA1c >9 Asymptomatic patient If poor response even after 3 drugs HbA1c >9 symptomatic patient Complications Insulin
  • 28. Individualize therapy To reduce PP hyperglycemia DPP IV inhibitor Alpha glucosidase inhibitors Meglitinides Liraglutide Renal failure Repaglinide DPP 4 inhibitors Glitazones Metformin( if GFR <30 ml/min), Sulfonylurea contraindicated Hepatic disease Avoid metformin , Glitazones and DPP-4 inhibitors CAD GLP-1 agonist preferred Avoid – Glitazones
  • 29. Basal insulin  Single dose long acting insulin like NPH Glargine, degludec, detemir before breakfast (hepatic glucose production) with Oral drug (PP hyperglycemia)
  • 30. Basal bolus regimen • Increase 2-5 units every 3 day till pre dinner sugar normal •Regular insulin is added to long acting insulin •Day profiling is done • 5-10 units regular insulin added to morning dose If pre lunch high • Regular insulin given before dinner If hyperglycemia at bedtime • Add NPH at bedtimeNext morning hyperglycemia Day profiling  Fasting  Before lunch  Before dinner  Bed time
  • 31. Premixed insulin  Mixture of regular and NPH  30:70 BBF and before dinner  BETTER COMPLIANCE
  • 32.