I think it won't happen, and by designer/custom-based drugs i mean (for a general example) a drug which if taken will replace sensory output X with Y, as in the person will now see the sky as purple, or view ants as lego blocks.
I think this can be manufactured in an individual basis, but not in the capacity to alter it to other people in a finite number of changes to the drug. Ie a set person may have such an effect of the custom drug, but the drug won't at all have this effect on the next person. Likely the effect there would be very difficult to even tie to the first taker's experience/alteration of sense.
What is your view? Can such drugs be created or not? (meaning drugs which will target specific sensory output as such, in more than one human).
The reason i don't think it can happen is because likely there are myriads of crucial differences in how any sense is experienced in an individual human.
I think this can be manufactured in an individual basis, but not in the capacity to alter it to other people in a finite number of changes to the drug. Ie a set person may have such an effect of the custom drug, but the drug won't at all have this effect on the next person. Likely the effect there would be very difficult to even tie to the first taker's experience/alteration of sense.
What is your view? Can such drugs be created or not? (meaning drugs which will target specific sensory output as such, in more than one human).

The reason i don't think it can happen is because likely there are myriads of crucial differences in how any sense is experienced in an individual human.