Medications to Avoid with Myasthenia Gravis
When it comes to myasthenia gravis (MG), there are certain medications that should be avoided due to the potential of worsening symptoms or causing serious side effects. Here are some medications that should be avoided and the reasons behind it:
- Class I drugs: These drugs should be avoided in MG because they can worsen symptoms. It is important to ask your doctor before taking any medications from this class.
- Adenosine triphosphate (ATP): This medication, used for terminating paroxysmal supraventricular tachycardia, can exacerbate bronchial asthma. If you have MG and also suffer from asthma, it is best to avoid this medication.
- Ca 2+ channel blockers: These medications may induce lower extremity edema. Additionally, certain blockers may cause general malaise, sleep disorders, bronchial asthma, a depressive tendency, and intermittent claudication. It is important to consult with your doctor before taking any Ca 2+ channel blockers if you have MG.
- Disopyramide: This medication may cause hypoglycemia in a dose-dependent manner. If you have MG and are at risk for hypoglycemia, it is best to avoid these medications unless otherwise prescribed by your doctor.
- Amiodarone: This medication has various extracardiac side effects, including thyroid dysfunction (hyperfunction and hypofunction), pulmonary complications (interstitial pneumonia, etc.), liver dysfunction, eye complications (optic neuritis), and dermatitis (photosensitivity). Pulmonary complications occur in approximately 3% of cases, with a mortality rate of 5-10%. It is important to discuss the risks and benefits of taking amiodarone with your doctor if you have MG.
- Digoxin: This medication can cause extracardiac side effects as the blood concentration increases. The main side effects include digestive symptoms (nausea, vomiting, loss of appetite, diarrhea), central nervous system symptoms (confusion, blurred vision, yellowing, weakness, fatigue, headache), gynecomastia, and thrombocytopenia. If you have MG and are considering taking digoxin, it is crucial to consult with your doctor first.
In addition to these medications, moxifloxacin should also be avoided in patients with known history of myasthenia gravis. Fluoroquinolones like moxifloxacin have been associated with serious adverse reactions such as tendinitis, tendon rupture, peripheral neuropathy, central nervous system effects, and exacerbation of myasthenia gravis. It is important to reserve moxifloxacin for use only when there are no alternative treatment options available and under the guidance of your healthcare provider.
Remember that this information is not exhaustive and it's always best to consult with your doctor or healthcare provider before starting or stopping any medication if you have Myasthenia Gravis. They will be able to provide personalized advice based on your specific condition and medical history.