Antibiotics - Oxazolidinones: Nursing pharmacology

Oxazolidinones are a class of antibiotics used to treat a wide range of infections caused by gram positive bacteria, such as Streptococcus spp, Staphylococcus spp, including methicillin-resistant Staphylococcus aureus or MRSA for short, and Enterococci spp, including vancomycin-resistant Enterococci or VRE, and other strains resistant to other classes of antibiotics.

Additionally, oxazolidinones can be effective against mycobacteria and certain anaerobic bacteria, such as Fusobacterium spp, Prevotella spp, Porphyromonas spp, Bacteroides spp, and Peptostreptococcus spp.Alright, the most commonly used oxazolidinones include linezolid and tedizolid.

These medications can be administered orally or intravenously. Once administered, oxazolidinones target the bacterial 50S ribosomal subunit, which inhibits protein synthesis.

As a result, these medications have a bacteriostatic effect, meaning they stop bacterial growth.Side effects of oxazolidinones include headaches, dizziness, and insomnia; as well as optic neuropathy, which can lead to vision loss, but is usually reversible; and peripheral neuropathy, which can manifest as numbness, tingling, or weakness in the arms and legs, and is typically irreversible.

Some clients may also experience changes in tongue color and taste, as well as gastrointestinal disturbances like nausea, vomiting, and diarrhea.

In addition, oxazolidinones may disrupt the normal intestinal flora, which can allow certain bacteria like Clostridioides difficile to survive and overgrow within the gastrointestinal tract, rarely but potentially leading to Clostridioides difficile infection or CDI for short.

A very serious side effect of oxazolidinones is reversible bone marrow suppression, which can result in anemia, leukopenia, and thrombocytopenia.

Clients taking oxazolidinones may also develop lactic acidosis, as well as hypersensitivity reactions, such as Stevens Johnson syndrome or anaphylaxis.

In addition, one of the most serious side effects of oxazolidinones is serotonin syndrome. That’s because these medications partially inhibit enzymes called monoamine oxidases or MAOs for short, which are responsible for the breakdown of neurotransmitters like serotonin.

This typically occurs when oxazolidinones are combined with serotonergic medications that also increase the level of serotonin in the brain, including tricyclic antidepressants, monoamine oxidase inhibitors, and selective serotonin reuptake inhibitors.

So, clients that develop serotonin syndrome usually present with skin flushing, hyperthermia, agitation, muscle rigidity, seizures, and altered mental status, or even coma.

Finally, another dangerous side effect of oxazolidinones is a hypertensive crisis, which is most commonly seen when combined with tyramine-rich food and drinks, such as aged cheese, red wine, and beer; as well as foods containing phenylalanine such as chocolate and caffeine.

Clients that develop hypertensive crisis typically present with hypertension, tachycardia, and arrhythmias, as well as hyperthermia, and agitation.

As far as contraindications go, oxazolidinones should be avoided in clients with uncontrolled hypertension, or other conditions that cause hypertension, such as pheochromocytoma, or thyrotoxicosis, unless their blood pressure and heart rate are closely monitored.

Regarding interactions, oxazolidinones shouldn’t be combined with sympathomimetic medications, such as pseudoephedrine, vasopressors like epinephrine and norepinephrine, and dopaminergic medications, such as dopamine and dobutamine, which also raise blood pressure.

Also, oxazolidinones should not be administered within 14 days of other serotonergic medications like MAO inhibitors. Additional precautions should be taken in clients with bone marrow suppression or thrombocytopenia, as well as in those with seizures, gastrointestinal or renal disease.

Finally, these medications should also be used with caution during pregnancy and breastfeeding, as well as in children.Alright, when a client is diagnosed with an MRSA skin infection, and they’re prescribed an oxazolidinone like linezolid, first, assess the affected area, making note of the presence of any drainage, odor, redness, warmth, swelling, or pain.

Then, obtain baseline vital signs, especially heart rate and blood pressure; and review recent laboratory test results, including CBC, blood glucose, renal and hepatic function, as well as wound culture and sensitivity results.

Next, explain to your client that their medication will help to treat the infection. Instruct them to take this medication twice daily, with plenty of fluids, and with or without food.

If they are prescribed an oral suspension, instruct them to invert the bottle gently 3 to 4 times and to avoid shaking the solution; also, remind them to use the provided measuring cup or oral syringe to ensure accurate dosing.

Then, instruct them to complete the entire course of medication, even if they start to feel better. During therapy, emphasize the importance of avoiding foods that have been pickled, smoked, or fermented, like aged cheeses, processed meats like salami and pepperoni, red wine, and beer, as these are often high in tyramine.

Then, be sure to teach your client how to recognize important side effects that should be reported to their healthcare provider right away.

These include CDI, which could cause abdominal cramping, diarrhea, or bloody stool; as well as peripheral neuropathies, which can manifest as numbness and tingling in the peripheral extremities; and visual problems like blurred vision or changes in color vision.

Clients should also report symptoms of bone marrow suppression, which could present as unusual bruising or bleeding; symptoms of low blood sugar like dizziness, weakness, increased hunger, or a fast heartbeat; as well as symptoms of lactic acidosis, such as recurrent nausea and vomiting, confusion, fatigue, and fast breathing; an allergic reaction, which could manifest as an unusual rash, blistering, or peeling skin; and lastly, serotonin syndrome, which can present with skin flushing, hyperthermia, agitation, muscle rigidity, seizures, and altered mental status.

Finally, during treatment with an oxazolidinone like linezolid, remember to closely monitor for the development of side effects, and evaluate for the desired therapeutic effect of infection resolution.Alright, as a quick recap… Oxazolidinones are a class of antibiotics used to treat gram positive bacterial infections.

These medications include linezolid and tedizolid, which can be taken orally or given intravenously, and they work by targeting the bacterial 50S ribosomal subunit, ultimately inhibiting bacterial protein synthesis and growth.

Side effects of oxazolidinones include neurological symptoms like headache, dizziness, and optic neuritis; gastrointestinal disturbances like nausea, vomiting, and diarrhea; as well as more severe effects like myelosuppression, lactic acidosis, serotonin syndrome, and hypertensive crisis.

Oxazolidinones are contraindicated in clients with uncontrolled hypertension, as well as in those who are currently taking MAOIs, serotonergic agents, or other medications that can raise blood pressure.

When caring for a client taking oxazolidinones, nursing considerations include performing an assessment of the affected area, as well as monitoring for side effects and desired therapeutic effects of the medication.

Finally, client teaching is focused on safe self-administration and learning to recognize side effects that should be reported to the healthcare provider.

or other medications that can raise blood pressure, when caring for a client taking oxazolidinone. Nursing considerations include performing Assessment of the affected area, as well as monitoring for side effects, and desired therapeutic.

Effects of the medication. Finally, client teaching is focused on safe, selfie Administration and learning to recognize side effects.

That should be reported to the healthcare provider.