LSD is a synthetic drug with psychedelic effects that has the potential to create cheerful, non-threatening audiovisual hallucinations.
The body can build up a tolerance to LSD. You will need a higher and higher dose to achieve the same effects. As you increase the dose, you increase the chance of adverse effects.
Adverse effects can include panic attacks, anxiety, depression, despair, disappointment, and more. HPPD (Hallucinogen Persisting Perception Disorder) is another rare but recorded symptom of acid use.