An investigation by consumer watchdog Which? has uncovered an illegal advertisement for botox parties posted on the internet by an ex-nurse.
The investigation team contacted the ex-nurse after spotting the advertisement on the eBay auction site and posed as a potential customer.
They found that the woman was administering the prescription drug without a doctor after she told them: "He prescribes me botox and I bring it in my freezer bag."
The ex-nurse, named Lisa, also claimed: "It's better to have botox by an ex-nurse who's a beautician than by some doctor who normally deals with bunions."
She also failed to point out side-effects, such as the possibility of bleeding, bruising and infection, insisting that there were no side-effects "except for drooping" and claiming that it was okay to have a glass of wine before the injections were administered.
Which? health campaigner Jenny Driscoll said that there is "an increasingly casual approach to non-surgical treatments".
A spokesperson for the Medicines and Healthcare products Regulatory Agency (MHRA) said that the information would be investigated "as a matter of urgency".
"Promotion of botox to the public is strictly prohibited," the MHRA said. "If it's used for cosmetic purposes, the prescribing doctor accepts responsibility for safety, quality and efficacy."
Consumers are advised to ensure that their non-surgical cosmetic procedure is carried out by a properly trained and qualified medical professional within the appropriate surroundings.