Ambulance Service, Police & NHS are receiving an increasing number of calls for service with drug takers that have overdosed on Street Valium which is currently laced with Rohypnol causing the user's mouth & tongue to turn blue in colour. Some drugs users have been hospitalised after taking the drug. Clearly this presents a health risk & these drugs should be avoided at all costs. Anyone with any information regarding drugs can do so anonymously through crime stoppers on 0800 555 111 or telephone North Yorkshire Police on 101