Azithromycin Pharmacology

Azithromycin Pharmacology

On this episode, I cover azithromycin pharmacology. This drug primarily acts by inhibiting protein synthesis. It binds to the 50s ribosomal subunit.

GI adverse effects like nausea and diarrhea are going to be the most common with azithromycin.

Azithromycin has been associated with prolonging the QT interval. Drugs like amiodarone, ondansetron, citalopram, antipsychotics, and quinolone antibiotics can also prolong the QT interval.

One major advantage that azithromycin has over other antibiotics is that it has a long half life which allows for once daily dosing.

Azithromycin has numerous uses like pneumonia, MAC, alternative for ear infections in patients with a beta-lactam allergy, certain STD’s, and also is rarely used in long term COPD exacerbation prevention.

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Linezolid Pharmacology

linezolid pharmacology

Linezolid is an antibiotic used for bacterial infection. It primarily works by inhibiting bacterial protein synthesis.

Linezolid is primarily bacteriostatic against most bacteria which means that it inhibits the growth and doesn’t necessarily kill the bacteria itself.

Caution must be used with linezolid and serotonergic drugs as there is a risk for serotonin syndrome. Clinical risk/benefit analysis needs to be done.

Linezolid overall has good coverage for VRE and MRSA. It is an option for MRSA pneumonia where daptomycin is not.

Linezolid has both an oral and an IV option which allows for good continuity of inpatient and outpatient use.

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Nitrofurantoin Pharmacology

On this episode I breakdown nitrofurantoin pharmacology. Nitrofurantoin is an antibiotic that is used in the treatment of UTI’s.

Nitrofurantoin has activity by creating reactive metabolites that can disrupt protein synthesis and ultimately kills the bacteria causing the infection.

It is important to remember with nitrofurantoin, that in the setting of systemic infection and/or kidney involvement, the drug may not be very effective.

Nitrofurantoin can potentially reduce the effectiveness of certain vaccines. Be sure to look this up prior to administration.

Nitrofurantoin can cause pulmonary symptoms as well as neuropathy. This is very important to monitor for.

Be sure to check out our free Top 200 study guide – a 31 page PDF that is yours for FREE!