Which of the following is a symptom of LSD intoxication?

• A. Dilated pupils
• B. Hypothermia
• C. Bradycardia
• D. Hypotension

Answer: (A)

LSD intoxication produces sympathetic activation that drives several autonomic signs, with pupil dilation being one of the most characteristic. The iris dilator muscle responds to increased sympathetic signaling, so the pupils enlarge, reflecting the body's heightened arousal under the drug’s influence. Along with this, LSD often causes tachycardia and hypertension, and body temperature can rise, but it does not typically cause hypothermia, bradycardia, or hypotension. So dilated pupils fit the pattern of LSD’s autonomic effects, whereas the other symptoms would point away from this profile.