The woman told the General Medical Council (GMC) hearing in Manchester she felt "dirty" at having to perform sex for the doctor.
Rai prescribed the sedatives diazepam and chlormethiazole, and painkiller dihydrocodeine, despite knowing the patient had an addiction problem. He also gave a cocktail of drugs over a long period of time to other patients who were known addicts.
The GMC ruled that the doctor had voluntarily called himself off from work, adding he would pose a "significant risk" to the public if he was allowed to carry on working as a doctor.
