hobday

Jon Hobday, Greater Manchester public health lead for drugs and alcohol, described nitazines as "extremely potent".

Mr Hobday said from experiences in Manchester, one of the major concerns with nitazines is the fact most users do not realise they are taking them until it is too late.

Mr Hobday said people with drug addiction issues have been issues with testing strips which can give an indication if a substance has been laced with nitazines.

However Mr Hobday said the only safe option is not to take illicit drugs.

But Mr Hobday told BBC News he felt "hoodwinked and ashamed that I fell for it and Scotland fell for it".