In the game of Backgammon, if a player rolls doubles, do they get to roll again for another turn?

My friend insists that if you roll doubles you get to go again! That doesn’t make sense. If you roll doubles two or three times you would destroy the other person in the game!
My friend says that if you roll double sixes for example, after you play your sixes, you get to go again. Even if you do it Buy Ampicillin Online three times in a row!