I've been so bad about keeping up with my meds but I want to get back on track. a couple weeks ago I started taking 500mg of metformin a day. my doctor wanted me to slowly go up to 2000mg a day. I missed about a week of doses which would've put me at 1500mg starting this week. has anyone had any side effects from taking such a large dose without slowly getting up to it or should I just start where I left off and start at 500 a day again?