Actresses Lee Seung-yeon, Park Si-yeon and Jang Mi-inae were given two-year suspended sentences on Monday for abusing the anesthetic Propofol, which became famous for killing Michael Jackson.
The Seoul Central District Court said it is questionable whether the defendants had "truly repented" their offenses, but suspended their sentences because they already suffered "intangible losses" from their damaged public image.
In the case of Lee and Park, it also took into account that they need to look after their children.
The actresses sat expressionless as their sentences were read and afterwards quickly left the courthouse.
The court in a lengthy ruling accepted that the women already "demonstrated signs of Propofol addiction" when the anesthetic was classified as an illegal psychotropic in February 2011.
It found Lee guilty of using Propofol at least 320 times over the last six years or an average 4.5 times a month, while Park took the drug at least 400 times over four-and-a-half years or 8.2 times a month and Jang at least 410 times or 5.6 times a month.
Given the frequency and length of the abuse, the court rejected the actresses' defense that they took Propofol to cope with the pain of cosmetic treatment.