Conversation so far:
Did Andrew Johns ever possess ecstasy?
On 26 August 2007 Johns was arrested for fare evasion on the London Underground, and subsequently found to be in possession of one ecstasy tablet
Was Andrew Johns arrested on possession of ecstasy?
Andrew Johns was cautioned and released with no further charges.
Did Andrew Johns regularly take ecstacy?
Yes, Andrew Johns regularly took ecstasy, usually in the off-season. The ARU knew about this, and it was a factor in his contract not being renewed
Did Andrew Johns take the drugs for a reason?
He said he suffered from depression and bipolar disorder and the drugs helped him in dealing with the psychological 'pressure' associated with his career as an elite sportsman
Did Andrew Johns ever go on TV and state why he took drugs?
On 30 August, Johns revealed, live on the Footy Show, that he had regularly taken ecstasy throughout his playing career, mainly during the off-season
Are there any other interesting aspects about this Andrew Johns article, besides him doing drugs?
The ARU released a press statement stating that Johns' drug use was known and was a key factor in its decision to not proceed with contractual negotiations in 2004

Question: why did he suffer from these disorders?
Self-contained rewrite: Why did Andrew Johns suffer from these disorders?