What should I know before taking metformin?

• People with conditions that cause breathing to be ineffective - to not effectively oxygenate the blood or remove carbon dioxide from the lungs (respiratory failure). • People with kidney problems or chronic heart failure will need to be more closely monitored if taking metformin. Drinking alcohol while taking metformin can increase the risk of getting low blood sugar (hypoglycaemia) and lactic acidosis. Symptoms may include feeling faint or tired, confusion and difficulty concentrating, which may affect your ability to drive safely. Metformin may pass into breast milk in small amounts, but no adverse effects have been reported in breastfed babies. Drinking large amounts of alcohol, particularly on an empty stomach or if you have liver problems, can increase the risk of lactic acidosis. You should stop taking metformin and consult your doctor straight away if you getsymptoms oflactic acidosis; these include breathing difficulties and non-specific symptoms such as feeling weak, sick or generally unwell, vomiting, abdominal pain, or unusual musclepainsordiscomfort. Metformin only helps to control your blood sugar levels and should not be used as a substitute for eating healthily and taking regular exercise. ➡️ Your doctor will ask you to stop taking metformin temporarily if you are going to have a certain type of X-ray involving an injection of iodinated dye (contrast agent). You should not start taking metformin again until 48 hours after the X-ray, and only after your kidney function hasbeen tested and found to be normal.