Lewis's co-star Jodi Gordon was caught up in a drugs scandal last year, shortly after Lewis admitted to making a sex tape. Todd Lasance, who plays Aden Jefferies on the soap, was later arrested and charged with using cocaine.
When asked if there are any drugs problems on set, Lewis told News.com.au: "It's absolutely nothing like that. It's unbelievable how crap that is."
Talking about leaving the show this week, he said: "It's sad for me. It's been my home for two and a half years but I have to move on."
Lewis said of his sex tape scandal: "I have learnt my lesson in terms of waking up. You learn from your mistakes, that's just part of growing up. After all that, I just don't go out and party unless it's with my mates. And I don't drink unless there's a special occasion.
"I've really tried to hang on to the friends I had before I got on television because they are the ones who are not afraid to tell me when I'm being a d**khead."