TOPIC 14: SEDATIVES

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Last updated 3:13 AM on 8/29/26
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10 Terms

1
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Flumazenil

Benzodiazepine antidote

2
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Diazepam, Midazolam, Lorazepam, Zolazepam

D, M, L, Z

  • Benzodiazepine sedative.

  • MOA: Increases Cl⁻ channel opening frequency.

  • Positive GABA-A receptor allosteric modulator.

  • Produces:

    • Sedation

    • Anxiolysis

    • Muscle Relaxation

    • Anticonvulsant FX

  • Reversed by Flumazenil.

  • Zolazepam is usually combined with Tiletamine.


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Xylazine, Detomidine, Medetomidine, Dexmedetomidine, Romifidine, Clonidine

  • α₂-adrenoceptor agonist.

  • MOA: Decreases norepinephrine release.

  • Produces:

    • CNS Depression

    • Sedation

    • Analgesia

    • Muscle Relaxation

  • Ruminants require lower doses of Xylazine.


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Barbital, Phenobarbital

  • Long-acting barbiturate.

  • MOA: Enhances GABA-A receptor activity by increasing chloride channel opening duration.

  • Produces:

    • Sedation

    • Hypnosis

    • Anesthesia

    • Anticonvulsant Effects


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Amobarbital

  • Intermediate-acting barbiturate.

  • MOA: Enhances GABA-A receptor activity by increasing chloride channel opening duration.


6
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Secobarbital, Pentobarbital

  • Short-acting barbiturate.

  • MOA: Enhances GABA-A receptor activity by increasing chloride channel opening duration.

  • Pentobarbital is also used for euthanasia


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Chlorpromazine, Promazine, Propiomazine, Piperacetazine, Triflupromazine

  • Phenothiazine tranquilizer.

  • MOA: Blocks dopamine D₂ receptors.

  • Produces:

    • Tranquilization

    • Sedation

    • Antiemetic FX

    • No Analgesia


8
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Acepromazine

  • Phenothiazine tranquilizer.

  • 10–20 times more potent than Chlorpromazine.

  • First-choice phenothiazine in veterinary medicine.

  • MOA: Blocks dopamine D₂ receptors.

  • Produces:

    • Tranquilization

    • Sedation

    • Antiemetic FX

    • No Analgesia


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Azaperone

  • Butyrophenone tranquilizer.

  • MOA: Competitively blocks dopamine D₂ receptors.

  • Adverse effects include:

    • QT Prolongation

    • Torsades de Pointes


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Droperidol

  • Butyrophenone tranquilizer.

  • MOA: Competitively blocks dopamine D₂ receptors.

  • Combined with Fentanyl to produce neuroleptanalgesia.

  • Adverse effects include:

    • QT Prolongation

    • Torsades de Pointes