1.   DRUG-USING prisoners are to be given a heroin substitute for the first time in a Scottish jail in an effort to stop needle sharing.

2.   Stand outside the right methadone clinic and you will see men in business suits picking up their heroin substitutes, trying to keep their habits in check.

3.   Some, like Amsterdam and Rotterdam, already distribute the heroin substitute, methadone, to addicts.

4.   Prison officials said the two addicts were being furnished with the heroin substitute, physeptone.