Common Side Effects

• There are various common side effects of Mexiletine. These side effects are usually not considered to be harmful, as they tend to go away as the body adjusts to the medicine. However, if they worsen or linger, medical attention might be necessary. Some common side effects that could occur due to taking Mexiletine are loss of coordination, blurry vision, dizziness, diarrhea, constipation, clumsiness, throwing up, anxiety, tremors, discomfort of the stomach, heartburn, headache and loss of coordination.
  
  

Serious Side Effects

• Serious side effects can also happen due to Mexiletine. In situations of serious side effects, it is important to seek emergency medical attention as soon as possible. Some potentially harmful side effects of Mexiletine are vision problems, chest ache, extreme stomach ache, yellowing of the eyes or of the skin, sore throat, passing out, fast, slow or irregular heartbeat, extreme lightheadedness or dizziness, and fever.
  
  

Allergic Reactions

• Allergic reactions are also considered to be potentially dangerous side effects of Mexiletine. In cases of allergic reaction, it is vital to seek emergency medical assistance as soon as possible. Some signs of allergic reaction to Mexiletine are chest tightness, trouble with breathing, breaking out into hives, itchiness, and swelling of the mouth, lips, tongue and face.
  
  

Caution

• When considering whether to take Mexiletine, is it crucial to exercise caution (and talk thoroughly with your physician about the medication), particularly if you have liver disease, epilepsy, seizures, any heart-related problem or heart disease. Nursing and pregnant women must also consult their doctors before taking Mexiletine.
  
  

Overdose

• If an individual thinks he might have overdosed on Mexiletine, he must seek emergency medical help as soon as possible. Some symptoms of Mexiletine overdose are consciousness loss, dizziness, exhaustion, seizures, nausea, tingling or numbness sensations, and irregular heartbeat that is worsening.