With the advances of modern medicine, how long could a victim be tortured, healed, and tortured again?

[LSLGuy]

There’s this kinda-adjacent thread from 3 weeks ago.

(Ancient) torture vs modern pain killers

Do we have pain killers that would stand up to things like the brazen bull, rack, crucifixion, Judas’ cradle, etc without suffering pain, but allow also one to be fully aware of what is happening and also that the pain killers would not hinder motor function ?