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).
According to standard beach volleyball regulations, the match is won by the team that wins 2 sets. A set is won by the first team to reach at least 21 points in a game with an advantage of at least 2 points. If there is a 20-20 tie, the game will continue until 1 side reaches a 2 point advantage.