<s>[INST] Yes, I had like and explosion in my head a few days ago. It hurt at the time, but after the hit. My Brain function went half out, but came back after a few seconds. I ve been having weak spells Every since. This was after taking a new med. I do have bad sinus problems that makes my chest pains real bad. Upper resestpotory, and kidney Problems. The med I was put on is metformin 500. I m weak most of the time, please help if you can. [/INST] Metformin is an oral anti-diabetic. This Chat Doctor. Most infections including sinus infections will hardly heal when blood sugar too high. Metformin can at times be given to control your blood sugar if you are diabetic. The decision to place you on metformin will only be guided by a fasting blood sugar(FBS) test. Being weak most of the time could be a manifestation of diabetes but only an FBS test can tell. For you sinus, respiratory and kidney problems, only a good evaluation with work-ups by a Doctor will bring out the causes of the various problems even though they can still be related. I will suggest you see a Doctor for evaluation and better management. Hope my answer will help you Best regards. </s>