According to some embodiments, a system may treat blood containing metformin outside the body of a patient. The system may include one or more pumps configured to pump blood in a fluid flow path at a collective rate over 4 liters per minute. The system may include one or more heat exchangers operable to heat at least a portion of the blood to a temperature of at least 42 degrees. The system may include one or more convection dialysis modules configured to perform convection dialysis on at least a portion of the blood at least after the one or more heat exchangers allow the blood to cool one or more degrees.
