✅ Metformin Side Effects ✅ The actions of metformin primarily occur in the liver. For example, if you fast for 12 hours and then check your blood sugar, it increases because glucose prevents glucose from entering the liver. One of the side effects of metformin is that it produces more lactic acid in the liver, which causes the person taking metformin pills to experience body pain throughout the day. #diabexy #diabetescare #dietchartfordiabetics #metforminfordiabetics #diabetesmanagement #diabete