Terribly sorry i missed this on the first read but you stated you are taking Glucophage. Lactic acidosis is a condition that can be caused by metformin. If your hydration status is off, as such can happen during long intense exercise, that may worsen the situation. Seeing that you are approaching 60, your kidney function naturally declines with age and may also be a factor. We generally dose metformin on the lower end depending upon kidney function as the drug is approximately 90 % excreted in the urine. Bad kidneys or less than optimal kidney function results in drug accumulation therefore resulting in increased side effects.
Lactic acidosis is a very very rare side effect and is very serious if it actually occurred. 50% of cases being fatal. I do not know if mild excessive accumulation can cause a mild case of acidosis that may have lead to your symptoms.
Last edited by sillywabbit; 08-22-07 at 09:33 AM.