Pink cocaine, a dangerous mix of ketamine and ecstasy, is becoming increasingly popular on Ibiza, Spain’s party island. The drug has been linked to a teenage boy’s death in Madrid and fears are rising that it could become a major threat to British tourists. Police are warning of the risks, but clubbers are refusing to give up the fashionable drug. Experts say pink cocaine is made from the leftover sweepings of production, making it unpredictable and potentially deadly.