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On Sept. 15, Deryck Whibley's wife, Ari Whibley, sent Sum 41 fans into a frenzy when she took to Instagram to announce that her husband had been hospitalized with a particularly serious case of pneumonia.
"Deryck and I were supposed to be in Chicago right now, celebrating our eight-year wedding anniversary, but the universe had a different plan for us," she captioned a slideshow of photos including an image of two EMTs loading Deryck into an ambulance on a stretcher (see it next).
"We spent the entire night in the ER and will now be spending the next few days here in the hospital as he fights through pneumonia," she revealed.
Keep reading to learn the "scariest part" of Deryck's medical emergency and find out how he's doing now…
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On Sept. 15, Deryck Whibley's wife, Ari Whibley, wrote on Instagram that "the scariest part" of her husband's medical emergency was that "there is a lot of strain on his heart and they are telling us that there is a possibility of heart failure."
"This is obviously not our first time in a situation like this but it brings back a lot of really difficult memories seeing him back in a hospital bed connected to wires and IVs," she continued. "I know how strong he is because I have witnessed what he has been able to overcome but that doesn't make it any easier to see. I'll do my best to keep everyone updated but if you could keep him in your heart over the next few days, we could really use it."
Keep reading for an update on Deryck's condition…
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On Sept. 16, Deryck Whibley's wife, Ari Whibley, returned to Instagram to share an update on his condition…
"I'm very happy to be giving this update," she captioned an image of a bouquet of flowers alongside several candles and framed photos of herself and her husband. "Deryck was discharged after responding so well to his treatments. He is now under the care of his mother who is a registered nurse and myself."
"The pressure and strain on his heart and lungs has improved and he is able to breath without as much pain," she continued. "I can't tell you how truly grateful we are for the community around us. We knew we had support but the outpouring of love for our family has been absolutely overwhelming and we can't begin to say how much it has meant to us and helped us stay positive through this."
A few days later, Deryck shared an update of his own…
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On Sept. 19, Deryck Whibley took to Instagram to share an update about his health…
"I wanted to take a minute to say thank you to everyone for so much love and support. Although I'm not out of the woods of this pneumonia yet and have been told to be prepared for a bit of roller coaster sickness over the next couple of weeks, I'm staying positive and doing my best to get through all of this. I'm still bedridden, having a hard time breathing, tight chest pains and some pretty wild fever dreams, that I guess are keeping this whole thing somewhat entertaining. I'm in the best hands and am on the right medicine. I plan on being my absolute best for When We Were Young [in Las Vegas] next month. That's my goal," he captioned a photo of a neon heart.
It's not the first time Deryck has faced a scary and potentially life-threatening medical emergency.
Keep reading for a look back at his previous health crisis…
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Back in 2014, Deryck Whibley was hospitalized after his "liver and kidneys collapsed" due to excessive alcohol use.
"The reason I got so sick is from all the hard boozing I've been doing over the years," he explained on his website, where he shared this image of himself undergoing treatment in a hospital bed. "It finally caught up to me. I was drinking hard every day. I was sitting at home, poured myself another drink around midnight and was about to watch a movie when all of a sudden I didn't feel so good. I then collapsed to the ground unconscious."
He went on to explain that now-wife Ari Whibley — to who he was engaged at the time — rushed him to the hospital, where he was admitted to the ICU.
"I was stuck with needles and IVs all over," he wrote. "Needless to say it scared me straight. I finally realized I can't drink anymore. If I have one drink the docs say I will die. I'm not preaching or anything but just always drink responsibly."
He was in a coma for three days.
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In May, Deryck Whibley's band, Sum 41, announced their plans to throw in the towel after nearly three decades together.
"Being in Sum 41 since 1996 brought us some of the best moments of our lives. We are forever grateful to our fans — both old and new — who have supported us in every way. It is hard to articulate the love and respect w have for all of you, and we wanted you to hear this from us first," they wrote, adding that they were "excited for what the future will bring for each of us."
"Thank you for the last 27 years of Sum 41," they concluded.
The group – which is comprised of Deryck, plus Dave Baksh, Jason McCaslin, Tom Thacker and Frank Zummo – is set to perform at a music festival in Las Vegas in October and in Paris in November.
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Deryck Whibley and Ariana Cooper, who now goes by Ari Whibley, tied the knot in Los Angeles in 2015.
He was previously married to Avril Lavigne from 2006 to 2009.