The maker of Dettol says that "under no circumstances" should its products be injected into the human body.
RB says its disinfectant and hygiene products should only be used as intended.
It's after the US President suggested that tests should be carried out to see if COVID-19 patients could be cured by injecting them with disinfectant.
Donald Trump said it would be interesting to see if it works.
"I see this disinfectant, where it knocks it out in a minute, and is there a way we can do something like that, by injection inside, or almost a cleaning.
"Because you see it gets in the lungs and it does a tremendous number, so it would be interesting to check that."
