Rebecca’s sisters Caitlin and Jennifer claim that she abuses prescription drugs and “doctor shops” to get them. Rebecca says she only takes prescribed medications to treat legitimate conditions and adamantly denies both the claims of “doctor shopping” and abuse. She walked off the “Dr. Phil” stage during the taping and refused to return.

Dr. Phil and Dr. Charles Sophy, a psychiatrist and retired Medical Director for the County of Los Angeles Department of Children and Family Services, say that the combination of medications Rebecca is taking is a “deadly cocktail” that could be lethal.

“I’m not going to die,” says Rebecca in the video above. “I’m doing what I’m supposed to do.” Does she reject Dr. Phil’s offer of help?

This episode of Dr. Phil, “My Sisters Are Wrong. I Am Not a Drug Addict,” airs Friday. Check your local listing for airtimes.

WATCH: Psychiatrist Is Concerned About A Mom Who Takes What He Calls A ‘Deadly Cocktail’ Of Prescriptions

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