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Though she was a dedicated crime writer and doting mom, actor Patton Oswalt’s wife led a secret life of drug use before her shocking overdose death.

Michelle McNamara was surrounded by uppers, downers, painkillers, cocaine — and even a substance similar to ecstasy — in the private drug den of the family’s lavish Los Angeles home on April 21, 2016, RadarOnline.com can exclusively reveal.

According to the autopsy papers exclusively obtained by Radar, the 46-year-old had prescription bottles of Bupropion, an antidepressant, Cefdinir, an antibiotic, and Naproxen, an anti-inflammatory drug. All were prescribed to McNamara.

READ THE SHOCKING AUTOPSY REPORT

A prescription bottle missing a label was filled with Xanax. While speaking the cops, Oswalt, 48, claimed the medication belonged to him.

But in more sinister findings, officials called to the death scene found TFMPP, or Legal X, a recreational drug often sold as an alternative to MDMA, or ecstasy. The pill was embossed with a lightning bolt, and was hidden inside a small plastic bag tucked away inside a larger bag.

In additional, they discovered cocaine and levamisole, a dewormer for livestock often mixed with the hard drug, inside a small brown vial, also covered in a plastic bag.

Officials also found painkillers oxycodone and hydrocodone, and Dextroamphetamine, a dangerous stimulant that can lead to psychosis and heart failure.

The painkillers and stimulants were NOT prescribed to the mother of one.

Lab reports indicated that her blood tested presumed positive for benzodiazepines, fentanyl, and various kinds of opiates.

As Radar previously reported, McNamara died from multiple drug toxicity, specifically fentanyl, alprazolam and amphetamine toxicity.

She left behind her comedian husband of 11 years, and a 7-year-old daughter.

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