A perscription, schedule III, narcotic analgestic (pain killer) containing hydrocodone and acetaminophen (Tylenol). Hydrocodone is actually an opiate, like heroin, that gives an amazing euphoric body high but it's also very addictive (although not nearly as addictive as heroin).
Unlike basketball and football, there is no way of knowing how long a game of volleyball will be. Like the others have already said, whoever wins the first 3 out of 5 sets wins the game. How long that can take can be anywhere from 30 minutes to 2 hours. (I've played in both).
Game Intervals. The time between each game is called an interval. All game intervals must be three minutes, giving teams time to change sides and notify officials of player line-ups. Both FIVB and USAV rules allow the game organizer to request an extended interval up to 10 minutes between the second and third set.