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NBDE Part II > Sedatives > Flashcards

Flashcards in Sedatives Deck (9)
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1
Q

What is the mechanism of action of Benzodiazepines?

A

Modulate the activity of the inhibitory neurotransmitter: GABA

2
Q

What are the advantages of using benzodiazepines vs barbituates?

A

Benzo’s:

  • Less addiction potential
  • Larger therapeutic index
  • Less respiratory depression
3
Q

What can happen with IV injection of diazepam?

A

Can cause irritation such as thrombophlebitis due to the solvent the benzodiazepine is dissolved in.

4
Q

What is thiopental’s mechanism of action?

A

Terminated by redistribution of the drug out of the brain - it enters the brain rapidly and exits rapidly = quick onset, short duration

5
Q

Are barbiturates considered analgesics?

A

NO!

6
Q

What happens with a barbiturate toxicity?

A

Respiratory depression

7
Q

Where are barbiturates contraindicated?

A

In patient’s with intermittent porphyria - they enhance porphyrin synthesis and thus will aggravate the disease

In patient’s with Emphysema

In patient’s with severe pain

8
Q

How are barbiturates classified?

A

According to their duration of action:
Thiopental - ultra short acting
Phenobarbital - long acting

9
Q

What drug can reverse the effects of benzodiazepines?

A

Aminophylline