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Real Life Pharmacology - Pharmacology Education for Health Care Professionals

Cephalexin (Keflex) Pharmacology Podcast

Real Life Pharmacology - Pharmacology Education for Health Care Professionals

Eric Christianson, PharmD; Pharmacology Expert and Clinical Pharmacist

Education, Health & Fitness, Medicine

5716 Ratings

🗓️ 15 September 2022

⏱️ 12 minutes

🧾️ Download transcript

Summary

On this podcast episode, I discuss cephalexin pharmacology, adverse effects, drug interactions, and much more!



Penicillin allergies and cross-reactivity are common questions with regard to the use of cephalexin and I discuss this briefly in the podcast episode.



Cephalexin is a first-generation cephalosporin with its primary sweet spot being gram-positive bacteria like Staph and Strep species.



Warfarin, probenecid, zinc, and a couple of others are potential medications that can interact with cephalexin. I discuss this further in this podcast episode.

Transcript

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0:00.0

Hey all, welcome back to the Real Life Pharmacology podcast. I'm your host, pharmacist, Derek Christensen.

0:05.8

Thank you so much for listening today. Go check out Real Life Pharmacology.com. Go subscribe there.

0:13.1

You can get a free 31 page PDF on the top 200 drugs, simply in emails all it's going to cost you.

0:20.3

So kind of a no-brainer there.

0:22.0

Great resource if you're out in practice or if you're preparing for pharmacology exams

0:27.6

or board exams where medications are tested.

0:31.2

So go snag that for free at real-life pharmacology.com.

0:36.8

All right, let's get into the drug of the day today, and that is cephalaxin.

0:42.6

Brand name of this medication is Keflex, and this is a cephalosporin, as you could probably imply,

0:51.9

from the Ceph beginning of the word there. And it is a first-generation

0:58.4

cephalosporin. So if you remember previously had done Cephriaxone, and as we get to higher

1:06.7

generations, we generally get more and more gram-negative coverage. So Keflex and

1:13.2

being a first-generation cephalosporne, we are going to primarily have gram-positive coverage,

1:21.6

and gram-positive bugs include strep and staff species. Those are the most common targets that we're going to use a drug like Cephylaxen for.

1:32.9

With that said, there is potentially some activity against sensitive,

1:38.5

certain E. coli species, Klebsiella species, proteus species.

1:45.1

And as we get to talking about indications, urinary tract infection is sometimes an

1:52.5

indication for cephalaxon.

1:55.0

Generally not a first-line agent, but if we have susceptible species, we possibly can use cephalaxin in certain situations.

2:07.6

Now, most commonly where you're going to see cephalaxin used is skin and soft tissue infections.

2:14.6

Now, these are often staff or strep type infections,

2:20.8

which Keflex certainly will cover there. Other potential infections that may have,

...

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