Camarel, Yes. Since the Outfit had a tighter control over what each of the made men did to earn, they absolutely forbid any direct 'hands on' dealing in Drugs.
Here's how some of the made guys got around it:

Guys that were running large Juice Franchises would 'loan' money out to some known drug dealers and then have their guys collect. This way, they could say they loaned the money out but really didn't know what the guy was going to do with it or they could say the guy told them he was using the money for something else.