Antonyms of adj mind-altering

1 sense of mind-altering

Sense 1
mind-altering -- (producing mood changes or distorted perception; "hallucinogenic drugs are mind-altering substances")

INDIRECT (VIA psychoactive) -> nonpsychoactive -- (not affecting the mind or mental processes; "a nonpsychoactive pain reliever")

Similarity of adj mind-altering

1 sense of mind-altering

Sense 1
mind-altering -- (producing mood changes or distorted perception; "hallucinogenic drugs are mind-altering substances")
       => psychoactive (vs. nonpsychoactive), psychotropic -- (affecting the mind or mood or other mental processes; "psychoactive drugs")