Mila Kunis -- Rushes to Save a Man's Life

Mila Kunis just pulled a Patrick Dempsey and may have saved a man's life ... TMZ has learned.

Sources tell TMZ ... a 50-year-old man -- who works in Mila's house -- collapsed Saturday in her L.A. home. He suffered a violent seizure ... choking, coughing up blood and vomiting. He had bitten through his tongue.

A person on scene tells us ... Mila came running, had her friend call 911, then rushed to the man's side.

We're told the 28-year-old actress grabbed the man's head ... turned it to the side so he wouldn't choke ... while another person stuffed a wallet in his mouth so he wouldn't swallow his tongue.

Law enforcement sources tell us ... paramedics arrived on scene, rushed the man to the hospital, and he's since made a full recovery. We're told Mila volunteered to ride in the ambulance, but it wasn't necessary.