Quoted from 411 mania although original source is from the Super Luchas website.
Mexico's SuperLuchas.net reports that Randy Orton violated the WWE Wellness Policy after testing positive for the steroid Dianabol.
He first tested positive for marijuana, which results in a fine of $2,500 but not a suspension/policy violation. After he tested positive for marijuana, WWE ordered another drug test for other substances. That's when the Dianabol was discovered.
Dianabol (methandrostenolone) is a steroid that can be taken orally or injected. It was popular in the bodybuilding community until it was banned by the US Congress under Controlled Substances Act of 1970.
For now, this is only a rumor and hasn't been confirmed.
Should start calling him the Steroid Predator.