"sorry, but I'm not going to talk with you when you are in this state of mind"
or
"oh someone is at the door , I'll call you when i have time"

or
" I'll only talk with you when You are not drunk"

screen your calls - and if she keeps calling - turn off your ringer for awhile

eventually she will give up
sometimes you have to let old friendships slide by the wayside , esp if they are negative and stressful

I hope she doesn't drive while drunk...
if she isn't ready to stop drinking ....she is an adult & it's her choice

If she won't dry out for her family then there's nothing much anyone can do