Police are warning members of the public to be careful after six people were admitted to the Tweed Hospital with symptoms of GHB (gamma-hydroxybutyric acid) overdose.
Three were in intensive care for most of the weekend.
Police believe they all attended a party in the Murwillumbah area on Friday night where they took – and possibly also bought – the drug, also known as GBH or fantasy.
About 10am on Saturday, a 25-year-old woman was transferred from Murwillumbah to the Tweed Hospital suffering an unknown drug overdose. A 25-year-old man who was with her also later collapsed.
About 3.20pm, a 28-year-old man collapsed after arriving at Tweed Hospital.
All three have since been released from intensive care and were expected to return home last night.
Another three people were admitted to the hospital yesterday with less severe symptoms and have since returned home.
Police believe other people may have bought the drug at the party and are urging anyone who has purchased or been offered the liquid substance not to take it.
Anyone who has consumed the liquid or other illicit drugs and who feels unwell, is advised to seek immediate medical attention.
Anyone with information in relation to this matter or with any other drug information is urged to contact Crime Stoppers on 1800 333 000.