Took 30 units Lantus at night, and hit a small vein, had blood. Sugar level started rapidly going down 15 mins later.. over 100 points within a half hour, and still dropping. It went from 280 to 125 within an hour; the urgent care said to call 911, and paramedics helped me, but, the doctor at ER wasn't 'sure' exactly how the Lantus did this.. anyone have similar experience ?