Numbing effect from drugs other than cocaine?

[paranoid_android]

Real quick here, I wanted to ask if anyone has ever heard of a drug used recreationally that numbs the gums. SwiPA's father has financial issues atm and a vulnerability to addiction, and the last thing he needs is a coke problem. So, SwiPA found a bag in his garage left by one of father's friends. The residue numbed his gums when applied.

The man claims it is "ITT-90" and is a legal pharmecuetical. Now SwiPA could certainly understand some random powder not being coke. But a powder that numbs the mouth clearly AT LEAST has lidocaine in it, in which case it was marketed and sold as coke, meaning it was sought after as coke.

So please, somebody tell me this isn't a bullshit lie. Is there really a drug called ITT-90, or anything for that matter, that is used recreationally and is also a topical anesthetic?