On Nov. 21, 2012, Sheila Bartels walked out of the Sunshine Medical Center in Oklahoma with a prescription for a "horrifyingly excessive" cocktail of drugs capable of killing her several times over.

A short time later, she was at a pharmacy, receiving what drug addicts call "the holy trinity" of prescription drugs: the powerful painkiller Hydrocodone, the anti-anxiety medication Xanax and a muscle relaxant known as Soma.

In total, pharmacists handed her 510 pills that day - all legal, because she had a prescription with the signature of her doctor, Regan Ganoung Nichols, scrawled at the bottom, according to a probable cause affidavit.

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