"i've considered what's at stake, for myself, by sharing this – but i find myself without regard for that," Pyfrom writes. "i won't allow my selfish needs to get in the way of potentially reaching another human being's life."
Pyfrom played Andrew Van De Kamp, the son of Marcia Cross's character on the hit ABC drama, for eight years. In his open letter, Pyfrom touches on how his addiction may have contributed to his acting – but concludes that his success was not worth the pain.
"some people could argue that drugs have provided some of the most memorable, creative artists this planet has ever experienced. jimi hendrix, kurt cobain…the list goes on. but drugs also took their lives away," he writes.
"even i could say, for myself, that if it weren't for the struggles and experience of my addictions; i would not have created the things that i have. i can argue that with all certainty, in fact. but i would have much rather lived the moments that i lost; and seen what would have come, creatively, as a result of that."
In the end, abusing alcohol and drugs strained Pyfrom's personal and professional relationships, he admits.
"i wasted the time of valuable people, who worked so hard to pull my career to a higher place, by allowing my addictions to tug me out of their grip," he says.
Since leaving Desperate Housewives, Pyfrom has kept a low profile, guest-starring on Rizzoli & Isles and appearing in the 2013 TV movie Killing Lincoln. But Hollywood hasn't forgotten him: Fans and fellow celebrities shared their support for Pyfrom online after he posted his letter.
"you are brave & strong," Pretty Little Liars actress Lucy Hale Tweeted on Sunday. "I admire your honesty, my friend."
Fashionista and former Revenge actress Ashley Madekwe also showed Pyfrom love, Tweeting, "Brave boy," with a heart emoticon.