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Real Life Pharmacology - Pharmacology Education for Health Care Professionals

Benzodiazepine Pharmacology

Real Life Pharmacology - Pharmacology Education for Health Care Professionals

Eric Christianson, PharmD; Pharmacology Expert and Clinical Pharmacist

Education, Health & Fitness, Medicine

5716 Ratings

🗓️ 5 September 2019

⏱️ 14 minutes

🧾️ Download transcript

Summary

Benzodiazepines act by enhancing the effect of GABA, an inhibitory neurotransmitter.



Benzodiazepines can cause confusion, sedation, and respiratory depression.



There are many potential indications for benzodiazepines. They can be used in anxiety, status epilepticus, insomnia, and alcohol withdrawal amongst other things.



There is a boxed warning for the use of opioids with benzodiazepines. The primary risk of the combination is respiratory depression.

Transcript

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0:00.0

Hey all, welcome back to the real-life pharmacology podcast. I'm your host, Eric Christensen.

0:05.9

And on today's episode, I'm going to cover benzodiazepine pharmacology.

0:12.1

Now, as I went through my list of medications I've covered, it surprised me that I haven't covered benzodiazepines yet.

0:20.4

They are definitely used in geriatrics,

0:23.7

and you certainly see them in multiple other settings as well. So for those of you maybe that

0:31.6

don't know or learning benzodiazepines, some common ones that are actually seen, that I actually

0:37.3

seen pretty regularly

0:38.4

in clinical practice.

0:40.7

El Prasalam, that's brand name Xanax, Larazepam, which is Ativan, Klonazepam, Klonopin,

0:48.5

Tamazepam, Restoril, sometimes, not quite as much, probably, as some of the others mentioned

0:53.4

there.

0:55.0

And then occasionally diazepam as well, and that brand name is Valium. So these drugs work to enhance the effect of

1:05.6

GABA. And GABA is one of those inhibitory type neurotransmitters.

1:14.2

It does not cause, or excuse me, it kind of settles down those neurons.

1:21.1

And with that, you can kind of think of it in context of, you know, what this medication is going to

1:30.7

treat in that if we're going to settle down that patient, you can think of anxiety, you can think

1:36.8

of anxiety, insomnia, and that's, you know, primarily what I see benzodiazepines used for.

1:45.8

Kind of finishing up on that mechanism of action, how it actually does it,

1:50.1

it actually causes chloride ions to go into those neuronal cells,

1:56.2

and this causes a state of hyper-polarization,

2:10.3

which essentially makes the neurons less likely to fire and precipitate an inaction potential.

2:20.9

So that kind of rounds out the mechanism and a little bit behind it as to why it's used for, you know, certain indications and why it makes sense.

...

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