The FDA sent warning letters to 17 website operators about the illegal sale of unapproved and misbranded opioids.
These websites are selling opioids without a prescription and selling opioids with a lack of adequate directions for use.
The websites were selling opioids like tramadol and oxycodone.
The FDA sent the letters as part of its efforts to "take action against the illegal sale of opioids over the internet."
See a full list of the websites that received warning letters here.