As of June 1, , over-the-counter sales of medical drugs containing codeine (pentalgin, nurofen, solpadeine, etc.) are banned in Russia. Those in need of such drugs would have to obtain a prescription. Those drugs are used to produce desomorphine (Krokodil), a home-made opioid. According to. Desomorphine is a synthetic opioid with powerful, fast-acting effects, such as sedation and analgesia.