Also known as

Acid, Trips, Blotters, Tabs, Lysergic Acid Diethylamide.


  • LSD stands for its chemical name, Lysergic Acid Diethylamide.
  • The drug is a powerful hallucinogenic which causes changes to thoughts, senses and perceptions.
  • The effects of LSD use are usually called ‘tripping’. These effects are unpredictable and vary hugely from person to person.
  • A good trip can you make users feel relaxed and happy with pleasant hallucinations.
  • A bad trip can make you feel agitated and confused with unpleasant and frightening hallucinations.


  • In its pure form, LSD is a colourless, odourless and mildly bitter liquid.
  • The liquid is usually soaked into sheets of papers, (‘blotters’), which are cut into small squares, (‘tabs’), for sale at street level.
  • The square may be plain paper or sometimes printed with a colourful design.

Method of use

  • LSD is sometimes available in its pure, liquid form.
  • However, it is usually taken by ingesting small tabs of paper which have been soaked in the liquid and then dried.


  • You do not know whether you will have a good or bad trip until you take LSD.
  • Trips can feed off your imagination and may heighten a mood you’re already in. So if you are in a bad mood, feeling worried or depressed, LSD may just make these feelings worse.
  • A bad trip can involve terrifying hallucinations.
  • Whilst under the influence of LSD your perception of your body and the world can be distorted, which can leave you vulnerable to accidents or other dangers.
  • LSD can trigger or exacerbate mental health problems.
  • Regular users may experience flashbacks, sometimes weeks, months or even years after using LSD.
  • Using LSD in its liquid form can make it difficult to judge how much you are taking.

Keeping safe

  • If you choose to use LSD, 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.
  • Allow LSD time to work before taking more.
  • Mixing LSD with alcohol or other substances can be unpredictable, and it is safer to avoid this.
  • Be cautious about using LSD if you are aware of any existing mental health problems.
  • Don’t use when feeling tired, anxious or low in mood as you may be more likely to experience a bad trip.
  • As LSD is long acting, allow time to recover before driving.

Legal status

  • LSD is controlled as a Class A drug under the Misuse of Drugs Act 1971.
  • Possession of LSD could result in a prison sentence of up to seven years and/or an unlimited fine.
  • Supplying LSD to someone else could result in a prison sentence of up to life imprisonment and/or an unlimited fine.