People of the future will go to the app store and search "drugs" and a bunch of drug experience apps will show up. They'll tap one for a 30-second sample and the brain-machine interface in their head will give them that experience. If they like it, they can pay for a full hour or pay for a monthly subscription to have unlimited use. Someone who likes, say, psychedelics, will download an app that includes 40 varieties of psychedelic experience to try.
When they're high, they'll be able to crank the intensity up and down with a slide of their finger or shut off the high with a tap. All drugs will be totally safe with no hangover or comedown.
Musicians will create drug playlists to go along with new albums that time the different highs to different parts of the album. Movie producers will hire drug artists to "score" the movie with physical states the same way composers score movies with music.
There will be an "Oldies" app that lets people try a collection of retro drugs that their parents used to use back in the 2020s when drugs were still physical substances. It'll sound so old-school to them that people used to swallow or snort a drug with no guarantee of safety and no way to turn the experience off without waiting it out for hours.