Like "You should start to see results within a few hours after the first dose. The major side effect is possible lows since it will increase your insulin production if you need it or not, so it's important not to skip meals or drastically alter your carb intake. If you want to lower your carbs then do it slowly to see what happens or talk to your doctor about the dosage if you want to cut them significantly. It's handy to have glucose tablets with you just in case, especially if you are not near a food source. Also, know the signs of hypoglycemia,"