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Charlie Sheen is back on his HIV medication after a failed attempt to find a cure in Mexico.

The “Two and a Half Men” alum, 50, told Dr. Oz on Tuesday that he traveled to Mexico and met with Dr. Samir Chachoua, a physician claiming to know how to cure cancer and AIDS, and underwent a series of injections.

“We did see some incredible results early on,” Sheen explained. “Off the med cocktail (a mix of antiviral HIV medications) that I was undetectable. And it stayed that way. I did an experiment I didn’t have any faith in but I went along with it.”

Chachoua isn’t licensed to practice medicine in America, only in Mexico.

“I didn’t see it as Russian Roulette,” Sheen said. “I didn’t see it as a complete dismissal of the conventional course that we had been on. I’m not recommending that anybody else do this. I’m presenting myself as some kind of a guinea pig.”

Chachoua was so confident in his own treatment abilities that he injected himself with Sheen’s blood.

“It’s pretty inappropriate,” said Oz.

“Inappropriate and completely mind-blowing,” Sheen added of Chachoua’s behavior. “I watched that happen when he felt so confident. He delivered that my blood would not be any risk to him.”

Before the start of the show, Sheen said he received some upsetting news about his health. “I’m a little off my game because right before I walked out here, I got some results I was disappointed about,” he said. “I had been non-detectable, non-detectable and checking the blood every week and then found out the numbers are back up.”

As a result, Sheen has resumed his anti-viral HIV medications. “I’m going to take them on the flight home. What am I, an idiot?”

Sheen, who was originally diagnosed in 2011, first went public about his HIV status back in November.

A request for additional details regarding Sheen’s experimental treatment wasn’t immediately returned.