Four people have been admitted to hospital after taking some kind of drug, in the second incident this weekend.
They were admitted to hospital in Lancaster after taking what is thought to be a controlled drug.
It follows three people being admitted to Blackpool Victoria Hospital on Friday night after they were thought to have taken “suspicious substances”.
Police were called to Royal Lancaster Infirmary at around 3.10am today by staff following the admission of six people from The Sugarhouse Nightclub, on Sugarhouse Alley in Lancaster.
Four women, who are students at Lancaster University, and two men visiting friends at the university were admitted to hospital suffering what hospital staff believed to be an adverse reaction to taking some sort of drug.
The men are thought to have taken tablets described as a black shield shape with a crest or logo on the front of them and two of the women are thought to have taken some sort of powder substance.
Police say the other two women are thought to have fallen ill after drinking alcohol.
They have all since been discharged from hospital, except one who remains undergoing observations.
Police are urging anybody with similar tablets to hand them in to prevent other people becoming ill and so they can be tested.
Det Sgt James Edmonds, from Lancaster CID, said: “I would urge anyone to refrain from taking these tablets or indeed any sort of drug because the message is clear – you don’t know what you’re taking and the risk you are putting on your health could be devastating.
“Fortunately it appears that none of the individuals involved were seriously affected by this incident and I want to reassure the public that we are trying to identify the source of the tablets.
“This appears to be an isolated incident and we will continue to work with the university and our partners to educate young people to ensure this does not happen again.”
Police were called to Blackpool Victoria Hospital at around 11.50pm on Friday after staff raised concerns about two patients.
A 26-year-old man from Staffordshire was unconscious when he arrived and a 33-year-old man, also from Staffordshire, was suffering an adverse reaction after consuming some sort of tablet.
A 26-year-old woman from Blackpool was also admitted suffering from what hospital staff suspect to be an adverse reaction to some sort of drug.
All three have since recovered and been discharged from hospital.
A small quantity of tablets with the word “gold” on them were recovered from the men and a white powder was recovered from the woman.
Forensic tests are being carried out to try to establish exactly what the substances are.
Anyone with information about the supply of drugs is asked to call police on 101, quoting log number 237 of October 11, or pass information anonymously via Crimestoppers on 0800 555 111.
For drugs information and advice visit the Talk To Frank website www.talktofrank.com or call the National Drugs Helpline on 0800 77 66 00.