Concerns are being raised of "underground" beauty clinics operating in Auckland, where unqualified people are performing cosmetic surgeries and using unregistered medication.
Sources who wished to stay anonymous told the Herald they had lodged complaints to various authorities, including the government regulatory body Medsafe.
Derek Fitzgerald, Medsafe compliance manager, confirmed that in the past 24 months, two seizures of stock had been made and one official warning letter was issued.
"Medsafe has received information about activities in this area and Medsafe staff have been in contact with the complainant," Fitzgerald said.
"We have previously had discussions with the NZ Society of Cosmetic Medicine as part of our ongoing monitoring of issues in regards to medicines and medical devices used in cosmetic medicine."