Quite simply, he could’ve been talking about either coke or heroin. Both are commonly cooked in a spoon and then injected. Sure sounds to me to be an ‘anti-drug’ kind of song. Many rockers were falling out all over the place from drug use back then.

Lots of songs from the seventies seem to be along the lines of realizing that they’re on a destructive path. I believe Hotel California was about the same kind of thing. Gathering for the feast (addicts at a party or hotel room) stabbing ‘it’ (coke) with their steely knives (razor blades) but they just can’t kill the beast (addiction).

‘Life in the fast lane’ -same kinda thing.

Just my 2 cents.