Yes. It is an instrument used in the consumption of drugs.
Or do you mean musical instrument? TL;DR: It can be.
It comes down to how wide you want the definition of "musical instrument" to be. Is a drumstick a musical instrument? Is it what makes a drum designed to be played with sticks an instrument? What is such a drum without at least one stick?
"Well I could hit the drum with something else." Sure, but does that make the "something else" the instrument?
What is a woodwind (musical) instrument without the player's breath? A saxophone without a reed?
"I could smack it on something."
Well, yes, that's the crux of it.
In the loosest sense, anything that can be used to make a noise is a musical instrument. Take the popular joke of mayonnaise: if you put a straw in it and blow, I'm willing to bet some sort of noise can be had.
This then brings in the other argument: what counts as musical?
also, just to actually answer the question, if it’s played as an instrument, it’s an instrument. Anvils have been instruments (See that thing in Andor. that’s an instrument.) Saws, too. Wine glasses. (both, by playing the rim, as well as breaking them as a sort of percussive instrument.). Even your desk when you’re bored out of your skull waiting for that one email to come in so you can do your job. (rapatap tap, smack rapatap tap, thunk.)