Metformin - side effects? using this to counteract insulin resistance. any comments on side effects etc?

Few: Metformin is usually well tolerated. Most common se is stomach upset/diarrhea. Occasionally headache, metallic taste in the mouth or fatigue.

See below most commo: Abnormal stools Changes in taste Muscle pain Difficulty breathing Lightheadedness or dizziness Nail problems Flu-like symptoms such as muscle pain, fever, chills, and weakness Feelings of a rapidly or forcefully beating heart (heart palpitations). Flushing (a skin reddening, commonly on the face) Increased sweating Increased thirst