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Exacerbation of myasthenia gravis after amoxicillin therapy: a case series
Veria Vacchiano1, Piergiorgio Solli2, Ilaria Bartolomei3
1Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy. veriavacchiano@gmail.com.
Introduction:
Myasthenia gravis (MG) can be aggravated by several classes of drugs, including antibiotics. Penicillins are considered safe drugs for the management of infectious disease in patients with MG. However, a few cases of MG exacerbations after penicillin treatment have been reported in literature.
Case Reports:
We report six patients with MG developing acute worsening of symptoms after amoxicillin or amoxicillin/clavulanate treatment. In most of the cases, symptoms started in a few days after antibiotic administration. In all cases, we observed a worsening of the Myasthenia Gravis Foundation of America (MGFA) clinical classification. Most patients required a therapeutic intervention with dosage increase of the previous therapy or the introduction of new drugs for MG. All patients had a full recovery to baseline neurological conditions within 1-2 months.
Conclusions:
We concluded that patients receiving amoxicillin should be closely monitored for possible acute relapse.
Insights
Patients with myasthenia gravis (MG) may experience worsening symptoms after amoxicillin antibiotics. Close monitoring is advised during treatment to prevent acute relapses and ensure prompt intervention for recovery.
Area of Science:
- Neurology
- Pharmacology
- Infectious Diseases
Background:
- Myasthenia gravis (MG) exacerbations can be triggered by various medications, including antibiotics.
- Penicillins are generally considered safe for MG patients, but rare cases of MG worsening have been documented.
- This study investigates potential links between penicillin-based antibiotics and MG symptom exacerbation.
Purpose of the Study:
- To report and analyze cases of myasthenia gravis exacerbation following amoxicillin or amoxicillin/clavulanate treatment.
- To highlight the potential risk of penicillin-based antibiotics in patients with myasthenia gravis.
- To emphasize the need for vigilant monitoring in MG patients undergoing antibiotic therapy.
Main Methods:
- Case series reporting on six patients with myasthenia gravis (MG).
- Patients developed acute symptom worsening after receiving amoxicillin or amoxicillin/clavulanate.
- Assessment of symptom severity using the Myasthenia Gravis Foundation of America (MGFA) clinical classification.
Main Results:
- All six patients experienced worsening of MG symptoms within days of antibiotic administration.
- A significant increase in MGFA clinical classification was observed in all cases.
- Most patients required adjustments to their MG treatment, including increased dosages or new medications.
- Full recovery to baseline neurological status was achieved within 1-2 months for all patients.
Conclusions:
- Amoxicillin and amoxicillin/clavulanate may precipitate acute relapses in patients with myasthenia gravis.
- Vigilant monitoring for MG symptom exacerbation is crucial in patients prescribed amoxicillin.
- Early detection and therapeutic intervention can lead to full recovery in affected patients.
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