Replying to Inconsiderate Roommate

My roommate has been keeping me up since 12am with obnoxious coughing, and fucking with his phone/ computer.  Don't feel bad for his coughing, the asshole smokes a pack a day along with ganja, the point is it could be treated fairly easily with some cough syrup or drops.  On top of this little situation, he leaves the blinds down, and consequently i oversleep some days.  try pullin them up, but the fucker pulls them right back down.  It is 5:28am now, any ideas on how to keep my roommate awake indefinitely?