Under "no circumstance" should disinfectants be injected or consumed, the company which makes Dettol has warned, following comments made by Donald Trump.
The US president is facing a backlash after suggesting it would be "interesting to check" whether a disinfectant injection could help combat coronavirus.
During his latest press conference, Mr Trump said researchers were looking at the effects of disinfectants on Covid-19.
Wondering aloud if they could be injected into people, he added the virus "does a tremendous number on the lungs, so it would be interesting to check that".
But hours later, disinfectant manufacturer RB, the company behind the Dettol and Lysol brands, urged people not to try the method.
The company issued a statement saying: "Due to recent speculation and social media activity, RB has been asked whether internal administration of disinfectants may be appropriate for investigation or use as a treatment for coronavirus.
"As a global leader in health and hygiene products, we must be clear that under no circumstance should our disinfectant products be administered into the human body (through injection, ingestion or any other route)."
It added that all its products should only be used as intended and according to usage guidelines.
In response to the Mr Trump's comments, William Bryan of the Department of Homeland Security science and technology unit said health officials were not considering such treatment.