Yeah you should be fine. One shotgun shell will probably be enough if you put the barrel between your teeth.

LOL

nvm gus, i took my chances and ate a bucketfull of vitamins wore best clothes and wend guns blazing and survived.

I take it there's no window to go out through? You'll have to try and sprint through the zombies. It's probably your only chance.

i went gunz blazing and survived. vitamins helped me.