Mestinon is a prescription medication that contains the active ingredient pyridostigmine. This drug is indicated to alleviate muscle weakness symptoms associated with myasthenia gravis, an autoimmune disease in which the muscles progressively degrade. Though the majority of patients do not develop side effects while taking this medication, all patients should be aware of the potential side effects of Mestinon before beginning treatment.
Upset Stomach
Treatment with Mestinon may cause upset stomach side effects in patients. Such effects may include nausea, diarrhea, vomiting or abdominal cramping, RxList reports. These side effects typically occur in patients who take unusually high doses of Mestino. If these side effects emerge, affected patients should seek prompt medical care.
Sweating or Drooling
Excessive sweating or saliva production may occur in patients taking Mestinon, Drugs.com warns. Sweating can be uncomfortable and may cause a patient's skin to feel moist, cool or clammy. Excessive saliva production may lead to symptoms of drooling in patients treated with this medication.
Blurred Vision
Mestinon can cause vision changes in treated patients. Blurred, cloudy or double vision may cause sensations of dizziness, lightheadedness or confusion in affected patients. These vision alterations may also occur in conjunction with excessive tearing or watering of the eyes, PubMed Health reports.
Breathing Difficulties
Breathing difficulties may develop due to increased mucus production within the respiratory tract caused by Mestinon, according to RxList. Affected patients may experience shortness of breath, wheezing or cough, and should consult a medical professional for further evaluation and care.



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