The drugs don't work

So you thought drugs made you feel better? Think again...

Isn't ecstasy safe as long as you drink lots of water?

You're probably aware of the potential killer combination of dehydration and rising body temperature that can affect E users. But drinking too much water is also dangerous. Stick to about a pint of non-alcoholic fluid every hour if you're dancing and take regular breaks to cool down. E can affect your health in the long-term, too, causing memory loss and stopping you sleeping properly.

I've given up smoking because I'm scared of getting cancer. But presumably smoking the odd joint is OK?

A recent study by the British Lung Foundation suggests the risks of developing lung cancer could be greater, because dope smokers still use tobacco and inhale for longer, usually without a filter. Even the odd joint will harm your health and some types of cannabis, including skunk, are so potent they can trigger mental illnesses in people who have an underlying condition

There's nothing wrong with taking the occasional line of cocaine at the weekend, is there?

While heavy cocaine use can lead to mental illness similar to schizophrenia, taking it regularly can damage your heart and the inside of your nose - who could forget Danniella Westbrook and her collapsing septum?

Isn't snorting a line or two of speed just the same as having a Red Bull or a strong espresso?

Most speed contains only five to ten per cent amphetamine. The rest is other stuff - you'll never know exactly what. Speed also strains your heart and, if taken with alcohol or antidepressants, can be fatal. It makes some people panic and hallucinate. Heavy use can cause depression, anxiety, aggression and - in extreme cases - acute psychosis and paranoia.