Paper II
2025 August (Supplementary) (2010 Scheme)

Question

A 68year old female patient, complains of easy fatigability for past 6 months. Routine checkup showed her fasting blood glucose level to be 168 mg/dL, glycosylated hemoglobin (HbA1

  • (a) Classify Oral anti diabetic drugs with two examples each 3 mark(s)
  • (b) Briefly describe Metformin 3 mark(s)
Q26 marksEssays

Answer

a) Classification of oral antidiabetic drugs, two examples each

ClassExamples
SulfonylureasGlibenclamide, Glimepiride
BiguanidesMetformin
ThiazolidinedionesPioglitazone, Rosiglitazone
Alpha-glucosidase inhibitorsAcarbose, Miglitol
DPP-4 inhibitorsSitagliptin, Vildagliptin
SGLT2 inhibitorsDapagliflozin, Empagliflozin

b) Metformin MOA: activates AMP-activated protein kinase (AMPK) in hepatocytes, suppressing hepatic gluconeogenesis (its dominant mechanism) and modestly increasing peripheral insulin sensitivity/glucose uptake. Does not stimulate insulin release, so carries essentially no hypoglycemia risk as monotherapy — the reason it remains first-line therapy for newly diagnosed type 2 diabetes, as in this patient. Adverse effects: GI upset (nausea, diarrhea), lactic acidosis (rare but serious, risk amplified by renal impairment — contraindicated/dose-adjusted in significant renal impairment).

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