It's actually much better heroin than you're going to buy on the streets, because the stuff you buy from a drug dealer is contaminated. Actually, very little of it is heroin, whereas the stuff you get from the doctor is medically pure.
Es incluso mucho mejor heroína que la se consigue en la calle, porque la que vende el traficante está contaminada, y contiene muy poca heroína, y la que te receta el doctor es médicamente pura.