Which of the two is not a physcoactive drug? aspirin or codeine?
Answer:
both have the potential to be
aspirin
Either can be. It depends on how much and what it is taken next to.
Codeine is a narcotic, and is psychoactive at ordinary healing doses. It's effect on the central troubled system is it's therapeutic contraption.
Aspirin is an NSAID and isn't psychoactive at ordinary cathartic doses, nor is its primary mechanism via any effect on the CNS. In overdose it does affect the CNS and might be considered psychoactive.