You should wait for 3 - 4 days or until your dentist checks you again (whichever comes first.) Having any tooth pulled (wisdom teeth are difficult at best) tears the gums and your dentist has probably packed the gum down by the bone and stitched each one. If you are on pain killers DON'T DRINK! Alcohol will make you bleed more. If you haven't got much pain and you aren't on pain killers then 2 days after the pullings you can drink. Give the gums a little time to heal. Alcohol (I hate to tell you this) is actually a disinfectant.