• The correct name for speed is amphetamine sulphate.

• On the street it is known as speed, whizz, billy, sulph, uppers.

• Speed is the most impure illegal drug in the UK. The ‘street’ drug is often only 5% amphetamine.

• Speed usually comes as a grey, white or dirty-white powder, or sometimes in tablets. Another form of amphetamine, known as paste, has become available in some areas.

• Speed powder can be snorted, swallowed in a wrap, injected or smoked.

• The drug used in the USA is methylamphetamine (methamphetamine) which has similar effects, but the dose required is lower and the effects last longer. It is very rare in the UK.