Fent in coke doesn't make sense to me. Maybe they use contaminated equipment. If you wanted both you'd buy separately.
The way I understand it, fent is cheap. And low doses get you extremely high. Coke is expensive. Dealers cut the coke with fent to make their supply of coke last longer. Coke is more profitable but more expensive.
Chances are she bought coke and didn't know it was cut with fent.
They could cut the coke with anything, baking soda for example, but pretty soon word gets around that you are selling garbage. Cut it with fent and people still get high and come back for more.
