"There are three side effects of acid: enhanced long-term memory, decreased short-term memory, and I forget the third"

The quote by Timothy Leary is describing the results of taking LSD, typically called acid. The first adverse effects he mentions is improved long-lasting memory, which suggests that taking LSD can help enhance one's ability to bear in mind things over a long period of time. The 2nd side effect he points out is decreased short-term memory, which implies that taking LSD can hinder one's capability to bear in mind things over a brief time period. The 3rd side effect he discusses is that he can't remember what it is, which is likely a joke. In reality, there are numerous other side impacts of taking LSD, such as increased heart rate, increased blood pressure, and altered understanding of time and area. Taking LSD can also cause anxiety, paranoia, and hallucinations. It is important to note that the results of LSD can differ significantly from individual to person, and it is not suggested to take it without the guidance of a medical professional.