Did the Corleone family ever get into drugs? i thought that when Mike consolidated his nefarious power that meant they took over everything from barzini and tattaglia. It seems that Mike also knew of the Rizzoto brothers and there dealing of drugs but turned a blind eye.( the rizzoto's were in his family right?) Is it possible that mike wasn't against drugs the way his father was?

Yes, it has been asked before, but it's ok to ask again:
By agreeing to provide police and political protection at the Don's Convention, Vito put the Corleone Family in the drugs business--and they profited from it ("Certainly he [Vito] can provide a bill for such services," as Barzini said). The drugs business could not have gotten off the ground without Vito's intervention. There's no indication that Michael cancelled that arrangement after Vito died.

And you're right: the Rosato brothers were into drugs, and yet Michael supported them in their dispute with Frank Pentangeli.

We don't know what arrangements Michael made with the other families after the Great Massacre of 1955. But if they paid him any kind of tribute, at least part of it came from drugs. Even if Michael did not actively pursue the drugs business, he'd never turn down a rich source of profits.

In GF 2, we see Frankie complaining about the Rosatos' "with them it's junk and whores, and they do murder in their grandmother's neighborhood." Frankie was old school, like Vito, but as Turnbull says a buck is hard to ignore and Michael had plenty of buffers.

Michael's apparent "support" of the Rosatos was just a strategy Michael employed to facilitate his struggle with Roth.

Of course, in GFIII he said to Zasa: "And you guarantee that they don't deal drugs in those neighborhoods". So, while he may have accepted tribute from drug monies, he was stillopposed to them.

As usual I think Michael wanted it both ways. He gave the appearance of sticking to the comromise his father had made about keeping the sale of drugs restricted, and certainly not in Italian neighborhoods, or to children. But he also knew it was inevitable drugs would be sold everywhere, and proabbly turned a blind eye. Pentangeli, who was old school naively thought Michael might be persuaded to allow him to go after the Rosatos by telling him they were pimps (which Vito did not like) and violato.rs of Vito's drug compromise. Obviously MIchael had bigger fish to fry.