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Pharmacology General 2791504d

All of the folloiwng statements about meglitinides are true, except:

A
Act by stimulating insulin release
B
Decrease postprandial hyperglycemia
C
Hypoglycemia is less common than with sulfonylureas
D
Act by decreasing insulin resistance
High-Yield Explanation
Ans is 'd' i.e. Act by decreasing insulin resistance o Though structurally unrelated to sulfonylureas, the meglitinides class of hypoglycemic drugs (Repaglinide and Nateglinide) bind to same ATP dependent K channels as do sulfonylureas and stimulate insulin secretion by closing these channels in pancreatic 13-cells-insulin secretogogue action. o The meglintinides are incapable of stimultating insulin secretion in nutrient-starved fl-cells but in the presence of glucose, they demonstrate hypoglycemic effects by augmenting the release of insulin. Consequently, meglitinides seem relatively unlikely to cause fasting hypoglycemia. o For the same reason, meglitinides effectively reduce post pradndial hyperglycemia as they demonstrate hypoglycemic effects in the presence of glucose.

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