Cefepime Pharmacology

Cefepime is a fourth-generation cephalosporin antibiotic with broad-spectrum activity against both gram-positive and gram-negative organisms, including Pseudomonas aeruginosa. It works by inhibiting bacterial cell wall synthesis through binding to penicillin-binding proteins, leading to cell lysis and death.

Clinically, cefepime is commonly used in hospital settings for serious infections such as pneumonia, febrile neutropenia, urinary tract infections, skin infections, and intra-abdominal infections. It’s typically administered intravenously, with doses often ranging from 1 to 2 grams every 8 to 12 hours depending on the indication and renal function.

From a pharmacokinetic standpoint, cefepime is primarily renally eliminated, so dose adjustments are required in patients with impaired kidney function. Failure to reduce the dose appropriately can lead to neurotoxicity — one of the key adverse effects associated with cefepime — manifesting as encephalopathy, confusion, myoclonus, or seizures, particularly in elderly or renally impaired patients.

Common side effects include gastrointestinal upset and rash. Cefepime has relatively limited drug interactions, though concurrent nephrotoxic agents can increase the risk of renal injury.

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Clindamycin Pharmacology Podcast

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

Clindamycin (oral administration) can cause esophageal irritation and it is recommended to take this medication with a full glass of water.

C. Diff risk and frequent dosing are two of the biggest downsides to using clindamycin to manage infections.

Clindamycin has good activity against many gram-positive organisms like Staph and Strep as well as anaerobic activity.

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Doxycycline Pharmacology

On this episode of the Real Life Pharmacology podcast, I explore doxycycline pharmacology, adverse effects, and drug interactions.

Doxycycline can be bound by numerous minerals like calcium, magnesium, and iron. Coadministration can lead to reduced concentrations.

Sun sensitivity is a really important adverse effect that can be caused by doxycycline. Be sure to educate your patients.

Doxycycline can be used as an alternative to beta-lactams and macrolides in the management of community-acquired pneumonia.

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