On a recent episode of the Steve Austin Show, Sean Waltman admitted to longstanding rumors that he was high during a match with AJ Styles in TNA. Austin had shifted the subject of the interview to Waltman's history of substance abuse and Waltman didn't shy away from it.
Waltman admitted that he was high in a match with Styles and has recently apologized to Styles regarding the incident. While he didn't specify what drug he was high on, he did throw in, "meth feels incredible" and "it seemed manageable at first". He also admitted that he has suffered a series of relapses, but he's currently clean and sober.
You can listen to the full interview between Austin and Waltman here.