The Needle (movie, 1988)

Moro returns to Alma Ata to collect money owed to him. While waiting out an unexpected delay, he visits his former girlfriend Dina, and discovers she has become a morphine addict. He decides to help her kick the habit and to fight the local drug maphia responsible for her condition. But Moro finds a deadly opponent in "the doctor," the maphia kingpin who is exploiting Dina.