From LSD to Ecstasy, psychedelic drugs can have startling effects on perception, but do we understand what they do to our brains?
A look at the impact of analgesia, the chemistry behind morphine and the nature of drug addiction.
Is there such a thing as the perfect drug? Many thought so when the contraceptive pill emerged 30 years ago.
But just how does it work and what happened to the promise of the male pill?
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The action of anti-depressant drugs - have we become an unhappier society, and if so, what is the solution?