Diabetes, Type 2
"Been on Invokana for about two months, and while it lowered my insulin use (I&#039;m on a pump and was using about 250 units a day) it&#039;s had some unpleasant side effects too.  There is some pain in the penis during sex, and after the act the penis has turned bright red and sore on some occasions.  It usually goes away in a day or two, but I&#039;m thinking about going off of it.  I&#039;ve also had stomach upset, lightheaded and dizzyness (especially on getting up)."