You have a lot of opinionated adjectives in that second sentence that aren't related to the chemical, which is the same one as in the first sentence.

> a potent form of an addictive drug

It's literally the same chemical; you didn't use those adjectives when you described it earlier.

> quantities that are not metered

Readily fixed for < $20: https://www.amazon.com/dp/B07D1NNGM6/

https://erowid.org/chemicals/ketamine/ketamine_dose.shtml#or...

> At worst, you're getting some form of fentanyl because internet drug dealers are inept.

That's not a ketamine problem; it's a prohibition problem.