The aim of this study is to determine whether fasting and post-prandial glucagon secretion is suppressed by gliclazide in patients with HNF1-/4-alpha MODY. Participants will undergo an oral glucose tolerance test (OGTT) before and after omitting their gliclazide medication for 3 days.
Age range
18 Years
Sex
ALL
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Change in plasma glucagon from baseline (0min)
Timeframe: 0min, 30min, 60min, 90min and 120min during 75g oral glucose tolerance test.