My hon. Friend is right. I wrote an article recently in The Independent about drugs in general. As someone who is fanatically opposed to the taking of medicinal drugs, I tried to make the point that there are only two sorts of drugs: those that we know have very nasty side-effects and those whose nasty side-effects we have yet to discover. We know that there are problems with every possible drug that we can discuss. No drug that civilisation has encountered has had the trial in practical circumstances that cannabis sativa has had. It has been used by many people over a period of years without the reactions which have occurred with thalidomide, eraldin, opren and a whole host of other drugs which have made a lot of money for the drugs trade but have poisoned and killed many people.