"In his late 20s, Christopher Milford of East Boston, Mass., got high on some OxyContin his friend gave him.

By the time he was in his early 30s, he was shooting heroin and Suboxone.

Milford would reuse the same needle for a week or more. Then, one day, he was so sick he couldn't get out of bed.

"It felt like the worst flu I ever got in my life," he says. "It almost felt like a dream. I started doing weird things like putting PlayStation controllers in the sink in the bathroom. It was just weird, off the wall."

Milford had endocarditis, which is essentially an abscess on one of his heart valves. He spent seven weeks in the hospital on intravenous antibiotics. Eventually, he went back home. But he kept injecting drugs, and he got endocarditis two more times.

After the third time, Milford quit abusing opioids.

Six months later, he was smoking a cigarette when he noticed something was wrong with his hand. He kept dropping the cigarette. A few minutes later, he couldn't talk."

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