There are only a handful of drugs that turns you into that king of zombie. Mainly opiates that ilegalization itself made so powerful. Before being ilegal, the

There are only a handful of drugs that turns you into that king of zombie. Mainly opiates that ilegalization itself made so powerful. Before being ilegal, the most common opiate was opium. It has about the same strength as codeine, about 1/10 of morphine. Some people took it daily for decades, and they were fully functional, not zombies. Only after ilegalization we see people taking fentanil. Because it's easier to smuggle 10,000 doses of fentanil (1 gram) than 20 doses of opium (2 gram). The same happened with coca leaves vs cocaine: were coca leaves are legal, only a few use cocaine. And some people chew coca leaves all their lifes without too much problem. Certainly less than an alcoholic.