"I was shocked when I got notified of my test in November," he said. "I had to go through a long process and I'm relieved at the outcome.
"I'm not one to be in the limelight - I just carry on with what I do. I have a team working hard behind me."
But Tuipulotu was obviously not in a position to answer the many questions that remain, including what the banned substance was and why it had taken so long to request the "B" sample result.
"I can't say anything about that. I'm leaving that to my team."
Tuipulotu's team seems to consist of his lawyers, NZ Rugby Players Association, New Zealand Rugby, the Blues and Auckland Rugby.
"It's been hard watching the Blues train and myself training by myself, but it's been an eye-opener in terms of aspects outside of rugby."
Blues coach Tana Umaga was also relieved for Tuipulotu, after initial disbelief over the positive results.
"We've got total faith in Patrick and what he does. We're happy to have him back in the fold with us, where he should be."
More to come...