But pain specialist Dr. Michael Fishell said Friday that medical records show Gans did not have a current prescription for hydromorphone in Nevada or California.
Clark County Coroner Michael Murphy this week blamed the May 1 death of the 52-year-old singer and impressionist on "acute hydromorphone toxicity" and "chronic pain syndrome."
Hydromorphone is commonly known as Dilaudid.
Fishell first spoke with the Las Vegas Review-Journal on Thursday. The doctor says Gans told him he didn't want to take drugs because feared they would dry out his vocal cords.