For a rock and roller? Very. Take a peek on Ozzy's biography and you'll see permanent access to the stuff.
Black Sabbath even has a song titled Snowblind. The theme is that they were snowblinded per se when one of their Cocaine containers spread open while touring.
Thanks, I didn't know about it! Checked the song out, and it seems closer to the reality of the drug than the glamourised way that its usually portrayed in movies.
so normal that a plastic surgeon discovered a hole the size of a coin burned through Stevie Nicks' nose from her cocaine use.
there is also this rather unfortunate picture of Danyella Westbrook, who lost her entire septum to cocaine.