• Taking it in dangerous or out of the way places can increase the risk of accidents. Accidents may happen while users are hallucinating.

• A sudden shock or fright can send the user into an anxiety or panic attack. If this happens the user should be taken to a quiet place, reassured, told they are safe and that the bad feelings will wear off.

• When the effects of LSD have faded, users can feel exhausted, weak and depressed.

• Users may experience flashbacks, where parts of a trip are briefly re-lived some time after the event.

•  LSD can complicate mental health problems such as depression, anxiety and schizophrenia.