Questions: A common adverse effect that can occur while under the influence of d-lysergic acid diethylamide (LSD) is teeth grinding loss of hearing ability increased appetite loss of sight

The answer is the first one: teeth grinding.

Explanation for each option:

1. Teeth grinding: This is a common adverse effect associated with the use of LSD. It is often a result of increased muscle tension and anxiety that can occur during the experience.

2. Loss of hearing ability: This is not typically associated with LSD use. While LSD can cause auditory hallucinations, it does not generally lead to a loss of hearing ability.

3. Increased appetite: LSD is not known to increase appetite. In fact, it often suppresses appetite, unlike substances such as cannabis, which are known for causing increased hunger.

4. Loss of sight: LSD does not cause a loss of sight. It can cause visual hallucinations and distortions, but it does not lead to actual blindness or loss of vision.

In summary, teeth grinding is the most common adverse effect among the options listed when under the influence of LSD.