diabetes

Understand the differences among Type 1, Type 2, Gestational diabetes, and Prediabetes.
Differentiate between regular and analog insulin forms.
Discuss the five classes of insulin (three classes and two subclasses).
Comprehend the concepts of bolus and basal insulin delivery, including appropriate insulin types.
Explore glucose monitoring techniques and insulin delivery methods.
Identify major side effects of insulin, focusing on hypoglycemia and relevant symptoms/treatment.
Review major classes of antihyperglycemic medications: biguanides, gliptins, sulfonylureas, and DDP-4 inhibitors, and understand their mechanisms.
Recognize major side effects of antihyperglycemic drugs.
Discuss patient education and important teaching points related to diabetes.

Diabetes is characterized by insufficient production or utilization of insulin, resulting in hyperglycemia (Diabetes Canada, 2024).

Type 1 Diabetes Mellitus (T1DM)
- 5-10% of diabetic Canadians develop T1DM, mainly during childhood/adolescence.
- Autoimmune condition leads to destruction of pancreatic beta cells.
- Symptoms develop rapidly, requiring exogenous insulin.
Type 2 Diabetes Mellitus (T2DM)
- Represents 90-95% of diabetic cases; onset can occur at any age.
- Symptoms less obvious, often associated with weight gain.
- Involves insulin resistance in target tissues and impaired secretion.

Occurs in 3-20% of pregnancies (Diabetes Canada, 2024).
Usually resolves after childbirth; treatment mirrors diabetes care during pregnancy.
Factors include hormones from the placenta and increased cortisol levels.

Blood sugar levels above normal but below T2DM threshold.
Associated with an increased risk for developing T2DM.
Hgb A1c levels of 6.0-6.4% indicate prediabetes, manageable through lifestyle changes.

Cardiovascular Disease: Increased atherosclerosis.
Retinopathy: Damage to retinal capillaries.
Renal Failure: Proteinuria leading to decreased GFR.
Nerve Damage: Damage to nerves due to poor capillary supply.
Gastroparesis: Stomach emptying delays due to autonomic nerve damage.
Amputation: Risks heightened by infections due to high sugar environments and neuropathy.

Regulate blood glucose levels.
Prevent long-term complications, focusing on:
- Diet and self-monitoring.
- Physical activity and insulin administration timing.
- Emphasizing safe glycemic control (prevent hypoglycemia).

Self-Monitoring: Essential for patients using insulin—ensures rapid feedback on glucose levels.
Continuous Monitoring: Advanced systems measure interstitial glucose with alarms for abnormal levels.

Produced in pancreatic islets; secretion is stimulated by nutrients and hormonal actions.
Without insulin, body utilizes glycogen, proteins, and fats for glucose (catabolism).

Insulins are categorized by duration: short-, intermediate-, and long-acting.
Delivery routes include subcutaneous, intravenous, and inhalation, depending on the insulin type.

Rapid-Acting Insulin: Examples include Lispro and Insulin Aspart, onset 15-30 mins.
Short-Acting Regular Insulin: Humulin R, onset 30 mins.
Intermediate-Acting: Neutral Protamine Hagedorn (NPH), administer 2-3x/day.
Long-Acting Insulin: Includes Detemir and Glargine, duration up to 24h.
Insulin Degludec: 24+ hour duration, requires specific pen devices.

Injection sites should be varied to prevent tissue damage (lipohypertrophy).
Insulin pens and infusion pumps offer convenient administration; user-friendly designs improve compliance.

Educate patients on recognizing hypoglycemia symptoms and appropriate responses.
Discuss medication interactions and their clinical impacts.

Be aware of drugs that cause hypoglycemia (sulfonylureas, excessive alcohol) and drugs that could lead to hyperglycemia (glucocorticoids).

First-line drug for T2DM, effectively lowers glucose and increases insulin sensitivity.
Side effects may include gastrointestinal issues and potential vitamin B12 deficiency.
Monitor kidney function due to risk of lactic acidosis.

Sulfonylureas: Stimulate insulin release but pose a risk of hypoglycemia.
DDP-4 Inhibitors: Improve incretin activity, with concerns for respiratory infections.
SGLT-2 Inhibitors: Lower blood sugar via glucose excretion, but with risks for UTIs and dehydration.

Multiple Choice Questions on Pharmacology for Diabetes Mellitus

Which of the following factors primarily contributes to the onset of Type 2 Diabetes Mellitus (T2DM)?A) Autoimmune destruction of beta cellsB) Insulin resistance in target tissuesC) Genetic mutation affecting insulin productionD) Abnormal glucose metabolism in the liverAnswer: B
In the context of insulin types, which of the following insulins has the longest duration of action?A) LisproB) NPHC) Glargine D) Regular InsulinAnswer: C
Which class of antihyperglycemic medications primarily increases insulin secretion from the pancreas?A) BiguanidesB) DDP-4 InhibitorsC) SulfonylureasD) SGLT-2 InhibitorsAnswer: C
What is the most common long-term complication associated with diabetes?A) NephropathyB) RetinopathyC) Cardiovascular DiseaseD) NeuropathyAnswer: C
Which of the following is a potential side effect associated with Metformin, a first-line medication for Type 2 Diabetes Mellitus?A) Weight gainB) Gastrointestinal upsetC) HypoglycemiaD) Kidney damageAnswer: B
Hypoglycemia can occur due to interactions between insulin and which of the following substances?A) AntidepressantsB) CorticosteroidsC) AlcoholD) AntibioticsAnswer: C
Which of the following monitoring techniques can be particularly beneficial for patients on insulin therapy to avoid episodes of hypoglycemia?A) Self-Monitoring of Blood Glucose (SMBG)B) Continuous Glucose Monitoring (CGM)C) Hgb A1c TestingD) Urine Ketone TestingAnswer: B