Legal highs are so popular the only option is to "educate people who are using them" about how they can make safer choices about the drugs they take, an addiction specialist told Good Morning Britain.
Associate medical director of the CRI, David Bremner, said: "In a matter of days a new drug will be released that will have one molecule changed that then beats the law so that it is no longer illegal...all we can do is educate people who are using them on how to make safer choices."
More top news
A Ukip councillor has been expelled from the party after allegedly making "jaw-dropping" comments in a TV interview.
"He was their for me everyday of my life, he was the best father I could ask for," Rafael Ramos's 13-year-old son said.
Ben Haenow's dreams came true for a second time tonight after his debut song Something I Need was declared the UK's official Christmas No.1.