Frequently Asked Questions About Mephedrone (4-MMC)

What is mephedrone (4-MMC)?

Mephedrone, also known as 4-MMC or 4-methylmethcathinone, is a synthetic stimulant in the cathinone family. It affects neurotransmitter systems including dopamine, serotonin and noradrenaline.

Is mephedrone the same as 4-MMC?

Yes. 4-MMC is one of the commonly used chemical names for mephedrone. Other names and slang terms may also be encountered, but substances sold under informal names may not necessarily contain what they claim to contain.

Is mephedrone legal?

The legal status varies by country and can change. In the UK, mephedrone is a controlled drug, so possession, supply and production are subject to criminal law. Anyone considering the legal position should check current guidance from the relevant government authority.

What are the risks of mephedrone?

Reported risks include increased heart rate and blood pressure, overheating, anxiety, agitation, insomnia, dehydration, and cardiovascular complications. Some people can also experience paranoia, confusion or other serious psychological effects.

Is mephedrone addictive?

Mephedrone can lead to problematic or compulsive use. Repeated stimulant use may contribute to tolerance, cravings and difficulties controlling use.

Can mephedrone cause an overdose?

Yes. Serious toxicity can occur, particularly when a person has taken an unknown or unexpectedly potent substance or has combined substances. Severe agitation, chest pain, seizures, overheating, loss of consciousness or difficulty breathing require urgent medical attention.

Can mephedrone be mixed with other drugs?

Combining psychoactive substances can make their effects considerably less predictable and increase health risks. In particular, combinations involving other stimulants or substances affecting serotonin can be dangerous.

How long does mephedrone stay in the body?

There isn’t a single reliable answer because metabolism and detection depend on factors such as the individual, the substance and the type of drug test. Detection windows should not be treated as a guarantee that a substance is no longer affecting someone.

What should someone do if they become seriously unwell?

If someone develops severe symptoms such as chest pain, a seizure, extreme overheating, severe confusion, unconsciousness or difficulty breathing, seek emergency medical assistance immediately. Don’t leave the person alone.

Is mephedrone safe?

There is no risk-free way to take mephedrone. Products obtained outside regulated medical or pharmaceutical systems can also contain unexpected substances or contaminants, making their effects difficult to predict.

Why is mephedrone sometimes called 4-MMC?

“4-MMC” refers to the chemical name 4-methylmethcathinone. “Mephedrone” is the commonly used name for the same substance.