I don't think it's a banned substance. However, if a player needs to take a valium prior to a game, you'd have to question whether that player is suitable to play in a Finals game.Take a Valium.
Are the players allowed to take a Valium the night before or day of or at all?
For the fans, on the other hands, it seems like it's exam the next day...insomnia, restlessness, anyone got more symptoms to add? :/