The other would be Larry Nivens Puppeteer tasp. It was a remote device that could be used to directly stimulate the brain pleasure center.

The dark side of it was that it could be so intense, “perfect pleasure”, as to ruin someone’s life as they tried to achieve it again.

Similarly the “drug” of choice were “wire heads” who had a wire connected to their pleasure center. Abuse of which led folks to just plug in and starve to death. But it was not as intense as the tasp.