Wiz Khalifa Offers Kanye West Marijuana Remedy

Wiz Khalifa almost buried the hatchet with Kanye West by extending a weed stem ... but then turned hostile on 'Ye again at the last second.

We got Wiz leaving Catch Monday night, where he sounded sympathetic to Kanye's recent mental breakdown and even offers a psychedelic remedy that he specializes in.

But before he leaves ... he takes one last shot at his hip-hop foe, who once claimed to own Wiz and Amber Rose's kid. Old grudges die hard.