Zach Bryan admits he drank '15 beers a day' as part of 'perfect routine' before quitting alcohol

Zach Bryan is getting candid about his relationship with alcohol, revealing that he once drank as many as 15 beers a day and was intoxicated when he wrote nearly every hit song of his career.

The country star, 30, opened up about his sobriety during a conversation with Matthew McConaughey that was released alongside his latest EP, "Young Manhood and Other Donatable Organs." Bryan detailed how his drinking eventually led to severe panic attacks that left him fearing he was going to die.

ZACH BRYAN ADMITS QUICK RISE TO FAME AFTER DECADE OF MILITARY SERVICE LED TO ALCOHOL DEPENDENCY "When I got in the throes of drinking f---ing 15 beers in a day and I kept going with that cycle, I started getting these really, really severe panic attacks where my whole body went numb, and I thought I was going to have a stroke and die," he told McConaughey.

"I’d curl up for days at a time, and I went to a doctor.

And, like I said, I still didn’t believe it.

I told the doctor, ‘Man, I’m just hungover.

I’m fine.’ And the doctor was like, ‘No, man.

You have a really severe thing going on here.’" Bryan said his doctor diagnosed him with panic disorder and suggested that quitting alcohol could help .

GET ENTERTAINMENT SCOOP DELIVERED RIGHT TO YOUR EMAIL BY CLICKING HERE "[My doctor] said, ‘I think you have a pretty bad panic disorder.

And if you quit drinking, that might help you a little bit.’ So I tried it, and I was like, ‘Oh, yeah.’" Before giving up alcohol, Bryan said he relied on drinking to manage his stage fright.

"So I used to get on stage.

Here’s my routine.

I used to think this was the perfect routine.

No show could ever go bad if I did this: work out, shower, play my guitar, listen to Bon Iver, drink four beers," he recalled.