Ampoule of morphine ("glass" in slang) cost from 3 to 15 rubles when purchased without a prescription from healthcare workers. Anasha, poppy - highly dependent on the region, but in general it is extremely cheap.
Depends on many factors. Some nasvay or anasha in the republics of Central Asia could cost nothing at all or cost a penny (and it is unlikely that there would be a price per gram at all). Those with access to medicines could get a gram of morphine for 30 kopecks. Well, simpler drug addicts bought in pharmacies ("grater" in the then slang) various drug-containing drugs such as ephedrine or solutan - at other times it was generally free, and later according to recipes obtained in different ways ("graters"). All this was also quite inexpensive.