Sure. Ketamine, shrooms, and molly (or MDMA) were the primary substances the inside sources claimed he was abusing over the last year.

Shrooms never show up on a urine test, as far as I'm aware. Ketamine and MDMA only remain detectable in urine for a week or two, sometimes as long as a month for those with really high BMI, very low activity levels, or a slow metabolism. So, he'd simply have to stop taking drugs for a couple weeks and he'd likely piss clean. This test wouldn't disprove any of the claims that he was rampantly abusing drugs during Trump's campaign or while "working/consulting" at DOGE (he only left government "service" a few weeks ago).

Besides all of that, there are tons of ways to easily defeat a urine drug test. You can literally walk into just about any headshop (stores that sell devices to smoke marijuana, e.g. bowls, vapes, bongs, etc) and they will almost certainly sell fake penises that come preloaded with "fake urine" that can pass a drug test. You wear the fake penis contraption like a garter belt under your boxers/underwear and when you go in for the urine test, you simply aim the fake penis into the cup and use whichever method that product has for dispensing its contents.

And that is just one method for getting around urine tests. The bottom line: There is literally no reason anyone should accept this "evidence" as proof that Elon Musk is not abusing drugs.