What are some of the physical effects of LSD use?

Panic attacks and tremors can indeed be associated with LSD use. LSD, or lysergic acid diethylamide, is a powerful hallucinogenic drug that alters an individual's perception of reality. One of the more acute psychological reactions to LSD is anxiety, which may manifest as panic attacks. This intense psychological symptom can present physical signs, such as a racing heart, sweating, or trembling, thus making the user experience tremors as their body reacts to the heightened state of anxiety and stress.

LSD can provoke unpredictable emotional responses, which may lead to feelings of terror or panic, especially in users who are unprepared for the intensity of the experience. The drug can amplify fears or paranoid thoughts, contributing to the onset of panic attacks. Additionally, tremors can occur as a physical manifestation of the stress or anxiety experienced during the drug's effects, leading to muscle tension and involuntary movements.

In contrast to the other options, which do not accurately reflect common physical effects of LSD, panic attacks and tremors are aligned with documented experiences of individuals under the influence of the substance.