Questions:
42. What are the common hallucinogens?
43. What common hallucinogen can be responsible for delayed impressions of déjà vu or flashbacks that may occur years after even a single-use?
44. Are all anticholinergic agents (including atropine, scopolamine, and cyclopentolate) hallucinogens?
45. What antiparkinsonian agents can cause hallucinations?
46. Can antidepressants cause hallucinations?
47. Can antipsychotics cause hallucinations?
48. What is the visual symptom of toxic levels of Digoxin?
49. Can erectile dysfunction medications cause hallucinations?
50. Can withdrawal from benzodiazepines produce hallucinations?

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Questions with answers:
42. What are the common hallucinogens?
Common hallucinogens: Cocaine, LSD, marijuana, mescaline, opiates, phencyclidine hydrochloride (PCP), psilocybin and psilocin (hallucinogenic mushroom), and Ecstasy,

43. What common hallucinogen can be responsible for delayed impressions of déjà vu or flashbacks that may occur years after even a single-use?
LSD

44. Are all anticholinergic agents (including atropine, scopolamine, and cyclopentolate) hallucinogens?
Yes

45. What antiparkinsonian agents can cause hallucinations?
All antiparkinsonian agents (dopamine agonists, bromocriptine, anticholinergic agents, etc.) can cause hallucinations.

46. Can antidepressants cause hallucinations?
Yes

47. Can antipsychotics cause hallucinations?
Yes

48. What is the visual symptom of toxic levels of Digoxin?
Xanthopsia (the illusion of abnormal colors—yellow and green are typical).

49. Can erectile dysfunction medications cause hallucinations?
No, they can cause bluish vision an illusion and perhaps ischemic optic neuropathy.

50. Can withdrawal from benzodiazepines produce hallucinations?
Yes

The information below is from Neuro-ophthalmology Illustrated-2nd Edition. Biousse V and Newman NJ. 2012. Thieme
11.4 Drugs and Toxins
Numerous drugs and toxins produce visual hallucinations and illusions. The following are some of the most common:
● Postoperative delirium: transient hallucinations after general anesthesia
● Hallucinogens:
  ○ Cocaine, LSD, marijuana, mescaline, opiates, phencyclidine hydrochloride (PCP), psilocybin and psilocin (hallucinogenic mushroom), and 3,4-methylenedioxy-N-methylamphetamine (MDMA; Ecstasy or Molly).
  ○ LSD is responsible for delayed impressions of déjà vu or flashbacks that may occur years after even a single LSD use.
● All anticholinergic agents (including atropine, scopolamine, and cyclopentolate)
● All antiparkinsonian agents (dopamine agonists, bromocriptine, anticholinergic agents, etc.)
● Antidepressants
● Antipsychotics
● Digoxin: toxic levels are associated with xanthopsia (illusion of abnormal colors—yellow and green are typical).
● Phosphodiesterase-5 inhibitors (erectile dysfunction medications): bluish vision
● Alcohol

Withdrawal of alcohol and benzodiazepines will also produce hallucinations.

Reference: 1. Neuro-ophthalmology Illustrated-2nd Edition. Biousse V and Newman NJ. 2012. Thieme

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