Gardaí are investigating after a number of people were hospitalised last night in relation to the consumption of controlled substances.
Gardaí say they are liaising with the HSE about the incident.
A UCD Students' Union spokesperson told RTE News, that a number of their students were hospitalised last night, after taking a cocktail of drugs, believed to have included amphetamines and LSD.
The union said that they were approached by gardaí to issue a safety message about the incident and warn students that a particularly "bad batch" of drugs is circulating Dublin.
They posted a message on their Facebook account:
"Several students have been taken into hospital last night after taking a bad cocktail of drugs that may have included amphetamines and LSD.
"The gardaí are worried that fatalities may occur if this batch is not taken out of circulation."