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Dr Crippen, the NHS Blog Doctor shares his thoughts on the subject. It may not help you to make your mind up but it's a good read anyway.
Clinical pearls of wisdom, glimpses of the future and a few other thoughts
Frank - a useful site for friends, families or anyone else worried about the effects of drugs
Release - confidential helpline giving advice and information to users, families and friends
Hungerford Drug Project - have been providing innovate substance misuse services in the centre of London for over 30years