In addition, studies have repeatedly shown that masks are effective in curbing the spread of the coronavirus. But that same month, the Food and Drug Administration revoked emergency authorization for the drug for COVID-19 patients and said it was "unlikely to be effective" and carried potential risks.
She also appears to have promoted conversion therapy in the past, with her website claiming of homosexuality: "All kinds of sexual bondage can be broken through the power of the blood of Jesus".
This is the latest move by Twitter to crack down on coronavirus misinformation - and the latest escalation in its clash with President Trump and his allies.
The video went viral on Facebook on Monday, with over 14 million views before it was removed. In June, he said he was taking it himself.
"We've removed this video for sharing false information about cures and treatments for COVID-19", Facebook told CNN, adding that it had begun "showing messages in News Feed to people who have reacted to, commented on or shared harmful COVID-19-related misinformation that we have removed, connecting them to myths debunked by the World Health Organization".
Facebook, YouTube, and Twitter deleted several versions of the video Monday night.
Twitter Inc said on Tuesday it had restricted Donald Trump Jr.'s ability to tweet from his account for 12 hours, after one of his posts violated the social media site's misinformation policy on COVID-19. "I reached out to her and said, 'Hey, I'm working on this effort and I'd like to talk to doctors, ' and we started emailing and talking, and as things have developed and she watched the virus, things have evolved", Martin said.
According to her Twitter profile, Stella says she is a "Physician, Author, Speaker, Entrepreneur, Deliverance Minister, God's battle axe and weapon of war", who has come forward to support Donald Trump's use of Hydroxychloroquine.
No action was taken against the president, who retweeted multiple clips of the same video to his 84.2 million followers Monday night. I don't know why they took her off.
The video shows a group called "America's Frontline Doctors" making a statement outside the Supreme Court in Washington DC.
Speaking in his daily coronavirus briefing, Donald Trump backed his choice to retweet a video from the Houston doctor Stella Immanuel on the use of hydroxychloroquine.