DRE Drug Categories & Effects

Question 1

Which category of drugs commonly causes dilated pupils and increased heart rate?

Accepted Answer

Stimulants

Answer

Stimulants, such as cocaine or methamphetamine, accelerate the central nervous system. This physiological response typically manifests as dilated pupils (mydriasis), an elevated heart rate, increased blood pressure, and heightened alertness. These effects are direct results of the drug's impact on neurotransmitters like dopamine and norepinephrine.

Question 2

Which drug category is most likely to cause horizontal gaze nystagmus?

Accepted Answer

Depressants

Answer

Horizontal Gaze Nystagmus (HGN) is an involuntary jerking of the eyes that occurs when they gaze to the side. Depressants, including alcohol, benzodiazepines, and barbiturates, are known to cause HGN by slowing down the central nervous system and disrupting the brain's ability to smoothly track objects. This makes HGN a key indicator of impairment by these substances.

Question 3

What effect is most commonly associated with narcotic analgesics?

Accepted Answer

Pinpoint pupils and low breathing rate

Answer

Narcotic analgesics, such as opioids like heroin or fentanyl, are central nervous system depressants. They typically cause miosis, or pinpoint pupils, due to their effect on the oculomotor nerve. Additionally, these drugs significantly depress the respiratory system, leading to a dangerously low breathing rate, which is a primary concern in overdose situations.

Question 4

Which of the following is a primary indicator of hallucinogen use?

Accepted Answer

Hallucinations and altered perception

Answer

Hallucinogens, like LSD or psilocybin, primarily affect serotonin receptors in the brain, leading to profound alterations in perception, thought, and mood. The most characteristic indicators are visual or auditory hallucinations, a distorted sense of reality, and altered sensory experiences. While other effects may occur, these perceptual changes are central to hallucinogen intoxication.

Question 5

Cannabis is most likely to cause which of the following effects?

Accepted Answer

Bloodshot eyes and memory loss

Answer

Cannabis, or marijuana, commonly causes bloodshot eyes due to vasodilation, an expansion of blood vessels. It also impairs short-term memory, concentration, and reaction time, leading to effects like memory loss and an altered perception of time. While it can cause some perceptual changes, severe aggression or pinpoint pupils are not typical primary effects.

(DRE) Drug Recognition Expert Certification Practice Test

(DRE) Drug Recognition Expert Certification Practice Test

DRE Drug Categories & Effects