Chemsex is the use of drugs to enhance sexual experiences, generally within the sexual networks of some gay, bisexual and other men who have sex with men. Chemsex refers to the use of drugs, often crystal meth (methamphetamine), GHB (gamma-hydroxybutyrate) and Mephedrone. During sex these drugs can intensify sexual pleasure but may also lead to higher risk activities for a persons sexual health and personal safety.
Why might people be involved in chemsex?
Enhanced sexual experience: The substances generally used in chemsex can increase sexual desire and sensation.
Social belonging and acceptance: People may find belonging and intimacy that they don't feel able to access in other areas of their lives.
Reducing inhibition and increasing confidence: Substances used in chemsex may reduce sexual inhibitions and increase confidence to participate in sexual activity.
Risks:
Chemsex can lead to unprotected sex which increases the risk of sexually transmitted infections and blood borne viruses. Injecting substances during chemsex, known as 'slamming' can increase the likelihood of risks related to sharing injecting equipment.
Overdose: mixing drugs or using high doses can lead to overdose and even death
Mental health: chemsex can contribute to poor mental health outcomes for people who are involved.
Addiction: frequent chemsex could lead to dependency on the drugs used.
Consent: the effects of drugs used may impact a persons ability to consent to sexual activity.
Scottish Drugs Forum: Offers training and support programs for frontline workers. Online training around broader LGBTQI+ people and substance use is available at SDF Training
Editorial Information
Last reviewed:
02/03/2026
Next review date:
02/03/2027
Author(s):
Chris Flynn.
Author email(s):
chris.flynn@nhs.scot.
Approved By:
Health Improvement Manager (Sexual Health)