DRE Glossary Terms
Accomodation Reflex - 🧠ANSWER ✔✔The adjustment of the eyes for
viewing distances. Meaning the pupils will automatically constrict as objects
move closer and dilate move further away.
Addiction - 🧠ANSWER ✔✔Habitual, psychological, and physiological
dependence on a substance beyond one's voluntary control
Afferent Nerves - 🧠ANSWER ✔✔Also called sensory nerves; nerves that
carry information about the external environment to the brain and spinal
cord via sensory receptors.
,Additive Effect - 🧠ANSWER ✔✔One mechanism of polydrug interaction.
For a particular indicator of impairment, two drugs produce an additive
effect if they both affect the indicator in the same way. For example,
cocaine elevates pulse rate and PCP also elevates pulse rate. The
combination of cocaine and PCP produces an additive effect on pulse rate.
Alkaloid - 🧠ANSWER ✔✔A chemical that is found in, and can be physically
extracted from, some substance. For example, morphine is a natural
alkaloid of opium. It does not require a chemical reaction to produce
morphine from opium.
Analgesic - 🧠ANSWER ✔✔A drug that relieves or allays pain
Analog (of a dug) - 🧠ANSWER ✔✔A chemical that is very similar to the
drug, both in terms of molecular structure and in terms of psychoactive
effects. For example, the drug ketamine is an analog of PCP
Anesthetic - 🧠ANSWER ✔✔A drug that produces a general or local
insensibility to pain and other sensations
Antagonistic Effect - 🧠ANSWER ✔✔One mechanism of polydrug
interaction. For a particular indicator of impairment, two drugs produce an
, antagonistic effect if they affect the indicator in opposite ways. For
example, heroin constricts pupils while cocaine dilates pupils. The
combination of heroin and cocaine produces an antagonistic effect on pupil
size. Depending on how much of each drug was taken, and on when they
were taken, the suspect's pupils could be constricted, or dilated, or within
the DRE Average range of pupil size.
Arrhythmia - 🧠ANSWER ✔✔an abnormal heart rhythm
Artery - 🧠ANSWER ✔✔The strong, elastic blood vessels that carry blood
away from the heart
Autonomic Nerve - 🧠ANSWER ✔✔A motor nerve that carries messages to
the muscles and organs that we do not consciously control. There are two
kinds of autonomic nerves, the sympathetic nerves and parasympathetic
nerves.
Axon - 🧠ANSWER ✔✔The part of a neuron (nerve cell) that sends out a
neurotransmitter
Bad Trip - 🧠ANSWER ✔✔A hallucination where the user becomes panic-
stricken by what he/she is seeing or hearing, and may become
uncontrollably excited, or even try to flee from the terror.
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
Accomodation Reflex - 🧠ANSWER ✔✔The adjustment of the eyes for
viewing distances. Meaning the pupils will automatically constrict as objects
move closer and dilate move further away.
Addiction - 🧠ANSWER ✔✔Habitual, psychological, and physiological
dependence on a substance beyond one's voluntary control
Afferent Nerves - 🧠ANSWER ✔✔Also called sensory nerves; nerves that
carry information about the external environment to the brain and spinal
cord via sensory receptors.
,Additive Effect - 🧠ANSWER ✔✔One mechanism of polydrug interaction.
For a particular indicator of impairment, two drugs produce an additive
effect if they both affect the indicator in the same way. For example,
cocaine elevates pulse rate and PCP also elevates pulse rate. The
combination of cocaine and PCP produces an additive effect on pulse rate.
Alkaloid - 🧠ANSWER ✔✔A chemical that is found in, and can be physically
extracted from, some substance. For example, morphine is a natural
alkaloid of opium. It does not require a chemical reaction to produce
morphine from opium.
Analgesic - 🧠ANSWER ✔✔A drug that relieves or allays pain
Analog (of a dug) - 🧠ANSWER ✔✔A chemical that is very similar to the
drug, both in terms of molecular structure and in terms of psychoactive
effects. For example, the drug ketamine is an analog of PCP
Anesthetic - 🧠ANSWER ✔✔A drug that produces a general or local
insensibility to pain and other sensations
Antagonistic Effect - 🧠ANSWER ✔✔One mechanism of polydrug
interaction. For a particular indicator of impairment, two drugs produce an
, antagonistic effect if they affect the indicator in opposite ways. For
example, heroin constricts pupils while cocaine dilates pupils. The
combination of heroin and cocaine produces an antagonistic effect on pupil
size. Depending on how much of each drug was taken, and on when they
were taken, the suspect's pupils could be constricted, or dilated, or within
the DRE Average range of pupil size.
Arrhythmia - 🧠ANSWER ✔✔an abnormal heart rhythm
Artery - 🧠ANSWER ✔✔The strong, elastic blood vessels that carry blood
away from the heart
Autonomic Nerve - 🧠ANSWER ✔✔A motor nerve that carries messages to
the muscles and organs that we do not consciously control. There are two
kinds of autonomic nerves, the sympathetic nerves and parasympathetic
nerves.
Axon - 🧠ANSWER ✔✔The part of a neuron (nerve cell) that sends out a
neurotransmitter
Bad Trip - 🧠ANSWER ✔✔A hallucination where the user becomes panic-
stricken by what he/she is seeing or hearing, and may become
uncontrollably excited, or even try to flee from the terror.
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
