The action followed a message from Donald Trump Jr containing a video clip discussing the effect of hydroxychloroquine.
Some, including President Trump, have suggested the anti-malaria drug works as a preventative measure against coronavirus, despite medical studies that indicate the contrary.
Twitter the post violated its Covid-19 disinformation rules.
Donald Trump Jr will still be able to surf twitter and send direct messages in the meantime.
Twitter told the BBC: “We agree with our policy.”
Major U.S. social media have taken steps to combat incorrect information about coronavirus.
Andy Surabian, a spokesman for Donald Trump Jr., told the BBC that he had been “beyond the bounds.”
“Twitter postpones Don Jr for sharing a viral video of fitness professionals discussing their views on hydroxychloroquine is further evidence that primary technologies intend to kill loose expression online, and is an example of how they commit electoral interference to suppress Republican voices,” he said.
“While there is in fact a lot of word warfare in the medical network about the effectiveness of hydroxychloroquine in the coronavirus remedy, studies have been reported through classical means such as CNN, suggesting that this would possibly be an effective remedy.
“Those who claim otherwise lie for political reasons.”
By Marianna Spring, disinformation specialist and social media journalist
It is Twitter’s latest move to take strong action against coronavirus data, and the most recent escalation with President Trump and his allies.
This new move to the account of the president’s son will certainly stoke the fire, with more cries of censorship from the president’s supporters.
Deceptive and destructive accusations about hydroxychloroquine were promoted through public figures and politicians of the pandemic.
Discussions on drugs have become as polarized as the current online debate on masks.
The video shared through Donald Trump Jr was emblematic of this, with others claiming to be doctors helping Trump. They warned that studies indicating that the drug was not effective were “false science.”
With increasing pressure on social media sites to act more temporarily and decisively against incorrect information about coronaviruses, this resolution may not come as a surprise.
But Twitter has reported on the US president’s claims about hydroxychlorquine itself.
Where you choose to draw the line will be a complicated and politicized resolution.
The petition requests the Federal Communications Commission to reconsider regulations that require social media providers to be responsible for content posted through their users, while allowing them to delete posts they consider objectionable.