A new medication ad has popped up in the US and it's got Eminem fans super excited.
The ad first drew fans' attention after Paul Rosenberg put a post on Instagram with a billboard in the background promoting a medication called "Revival".
The medication is spelled with a backwards "E", which Eminem's logo is known for, sending fans on a treasure hunt.
Reddit users tracked down the full ad online and found it was placed by Em's label Interscope Records, and when they followed the ad to its website, they found more clues.