Twitter has banned the US president's eldest son from tweeting for 12 hours.
The punishment followed a post by Donald Trump Jr containing a video discussing the benefits of Hydroxychloroquine.
Some, including President Trump, have suggested the drug works as a preventative measure against coronavirus, despite medical studies that indicate the contrary.
Twitter said the post had violated its Covid-19 misinformation rules.
Donald Trump Jr will still be able to browse Twitter and send direct messages in the interim.
Twitter told the BBC: "We are taking action in line with our policy."
The main US social media sites have all taken measures to crack down on misinformation about the coronavirus.
Andy Surabian, a spokesman for Donald Trump Jr told the BBC the decision had been "beyond the pale".
"Twitter suspending Don Jr for sharing a viral video of medical professionals discussing their views on Hydroxychloroquine is further proof that big tech is intent on killing free expression online, and is another instance of them committing election interference to stifle Republican voices," he said.
"While there is indeed much disagreement in the medical community about the efficacy of Hydroxychloroquine in treating coronavirus, there have been studies reported by mainstream outlets like CNN, suggesting that it may in fact by an effective treatment.
"Those pretending otherwise are lying for political reasons."
Latest Stories
-
Contributors own SSNIT, they must decide who becomes its Director-General – Austin Gamey
30 mins -
Move away from theory-based learning towards practical learning approaches – AUCC President to students
39 mins -
Haaland scores as Manchester City beat Nottingham Forest
2 hours -
Villas-Boas elected Porto president
2 hours -
Situation on frontline has worsened, Ukraine army chief says
2 hours -
US doctor describes witnessing starvation in northern Gaza
2 hours -
CAFCC: RS Berkane make final after USM Alger refused to play 2nd leg over Moroccans’ jersey
2 hours -
Elon Musk in China to discuss enabling full self driving
2 hours -
PSG clinch Ligue 1 title after Lyon’s win over Monaco
4 hours -
Guinness Ghana sets the pace at Ghana Beverage Awards with six awards
5 hours -
Burkina Faso suspends BBC, VOA radio broadcasts over killings coverage
5 hours -
Nicole Kidman honoured with AFI Life Achievement Award
5 hours -
Brassier scores winner for Brest as they edge Rennes to secure European football
5 hours -
Akufo-Addo jabs Ejisu independent candidate; rubbishes allegations to rig by-election
6 hours -
‘What are the real causes of the erratic power outages?’ GUTA asks ECG
6 hours