Aimee Copeland despises the use of morphine in her treatment, despite its effectiveness at blocking her pain, her father said in a Friday online update on his daughter's condition. Her graduate-school study of holistic pain management techniques leads her to feel she's a "traitor to her convictions" when she uses drugs to manage her pain, Andy Copeland said.

He also said the morphine has been making his daughter groggy, confused and has given her unpleasant hallucinatory episodes.

Aimee Copeland, 24, developed necrotizing fasciitis after cutting her leg in a fall May 1 from a homemade zip line over a west Georgia river. Her left leg, other foot and both hands have been amputated.

On Tuesday, Copeland's condition was upgraded from critical to serious, "a major victory that cannot and should not be diminished," Andy Copeland wrote Friday on his blog, where he has been providing regular updates on her progress. The development came shortly after Aimee Copeland had her first successful skin graft