3000 mg would be enough I suppose, however (!) keeping 100 tabs of that strength down will be rather challenging. It's a fairly large amount (volume) and your body will try to get rid of the poison (throwing up).
So you would have to use a reliable antiemetic to avoid throwing up most of it.
On top of the pills, the vodka would also be considered a poison and your body will even more likely expel it fast. The amount of liquid will make it easier to bring up both, the alcohol and the dissolving pills.
Probably best to skip the vodka, drink as little liquid as possible and get a good antiemetic.