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).
There is no ceiling, so a set continues until one team gains a two-point advantage. Fifth sets are played to 15 points, again with a minimum lead of two points needed to end the match. There are several ways a team can score a point in volleyball. By successfully grounding the ball on the opponent's side. When the opponent hits the ball more than three times before getting it over the net.