The Centers for Disease Control and Prevention (CDC) removed guidance from its website regarding drugs touted by President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE as possible treatments for the coronavirus amid disputes over their effectiveness.

The CDC had initially included guidance regarding dosage for hydroxychloroquine and chloroquine, the drugs recommended by Trump, noting that anecdotal evidence existed for their effectiveness.

“Although optimal dosing and duration of hydroxychloroquine for treatment of COVID-19 are unknown, some U.S. clinicians have reported anecdotally different hydroxychloroquine dosing," read the original guidance before including the dosage examples.

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However, the CDC’s website, which was updated Tuesday, no longer includes that statement, instead stating that the drugs "are under investigation in clinical trials" to be used on patients infected with the coronavirus.

The website now notes that "there are no drugs or other therapeutics approved by the US Food and Drug Administration to prevent or treat COVID-19."

The CDC did not immediately respond to a request for comment from The Hill regarding the change. The removal was first reported by Reuters.

The update comes as medical experts express skepticism over Trump’s confidence in the drugs, which he suggested he may take himself and was touting as recently as a Tuesday night interview on Fox News.

Anthony Fauci Anthony FauciControversial CDC guidelines were written by HHS officials, not scientists: report Overnight Health Care: Ex-Pence aide backs Biden over virus response | Trump's sharp words put CDC director on hot seat | Trump coronavirus adviser threatens to sue Stanford researchers Trump coronavirus adviser threatens to sue Stanford researchers MORE, the director of the National Institute of Allergy and Infectious Diseases, warned last week that there currently isn't any "strong" evidence that hydroxychloroquine, an anti-malaria drug, has proven effective in the coronavirus fight.

“We don’t operate on how you feel, we operate on what evidence and data is,” Fauci said, adding that it was "not a very robust study" or "overwhelmingly strong."