The ambulance service on the Spanish island of Ibiza says it is at risk of collapse because of frequent callouts to attend to clubbers having bad experiences with recreational drugs.

The local ambulance union says up to a third of emergency calls are to clubs, the largest of which has a capacity of as many as 10,000 partygoers, and are largely drug-related. It is calling on club owners to contract private ambulance services.

“It’s inconceivable that businesses with an income of millions of euros a year can’t provide this service which is saturating the emergency services at the expense of the local population,” the president of the local health services union, José Manuel Maroto, told elDiario.es.