The practice is usually associated with men who have sex with men (MSM), often involves multiple people and can lead to sexual encounters that last for hours or days. GHB (gamma hydroxybutyrate) or GBL (gamma butyrolactone), both often shortened to G or Gina, are drugs used socially and for the purposes of chemsex.Ĭhemsex is the use of drugs such as G, crystal methamphetamine, ketamine and mephedrone to enhance sexual activity. In recent years, one drug in particular keeps popping up in discussions about sexual activity: G. Sex and drugs often go hand in hand – they have done for decades. The dynamics of the drug, what it does to you, what it takes from you – depression, anxiety, isolation – can be crippling. Genuinely this is the most difficult substance I’ve ever worked with in over 20 years of addiction treatment.