Also known as

M-Cat, Meow Meow, Drone, Bubble, Bounce, Meph, Charge, Rush.


  • Mephedrone is a strong stimulant, and generally an amphetamine- like substance with similar effects to speed and ecstasy.
  • The reported desired effects include euphoria, increased concentration, increased energy and feelings of affection towards other people around you.
  • Unwanted effects may include feelings of paranoia and anxiety, vomiting, grinding of teeth, insomnia, heart palpitations and altered conscious levels.


Mephedrone can be found as a fine white, off-white powder with a light yellow hue.

Method of use

  • Mephedrone is usually snorted or wrapped in paper and swallowed, (known as ‘bombing’). Some people smoke it.
  • It can also be swallowed as a capsule or pill, and less frequently mephedrone is injected.


  • As mephedrone is a relatively new drug, not much evidence has yet emerged regarding the long term effects this substance may have.
  • You increase the risks to yourself if you combine alcohol with mephedrone or another substance that causes a high.
  • Some people have reported low mood, depression and irritability following use, especially extended periods of use.
  • Some users have reported sharp chest pains, palpitations and irregular heart beats. There have been fatalities.
  • Sharing injecting or snorting equipment risks infection with Hepatitis C and B viruses, as well as HIV.
  • Snorting mephedrone can cause nasal damage.
  • Injecting is particularly dangerous as it is much easier to overdose.

Keeping safe

  • If you choose to use mephedrone, then use it in a safe environment and in the company of someone you trust. Ideally, this person will not have used the substance themselves and will be in a position to get help if things go wrong.
  • Take small amounts first to test strength and effects; start low and go slow.
  • Mephedrone can be habit forming and tolerance can build up. Don’t use too frequently and take regular breaks.
  • The use of mephedrone with alcohol or other substances should be avoided.
  • Avoid using if you have a history of depression, heart problems or circulatory problems.
  • Seek medical advice if you experience chest pains, prolonged numbness of extremities or discolouration of skin.
  • Do not share injecting or snorting equipment. If you choose to inject then either get safer injecting advice from us, your local drug agency or nearest needle exchange.
  • If snorting, alternate nostrils and clean your nostrils with warm water to minimise damage.

Legal status

  • Mephedrone is controlled as a Class B drug under the Misuse of Drugs Act 1971.
  • Possession of mephedrone could result in prison sentence of up to five years and/or an unlimited fine.
  • Supplying mephedrone to someone else could result in a prison sentence up to 14 years and/or an unlimited fine.