Common side effects of Mexiletine include Confusion (223), Vomiting (223), Dyspnea (216). Serious side effects include Blind (182) and Stevens-Johnson syndrome (95). Mexiletine is classified as Medicine. Always consult a doctor if side effects persist.

Side Effects GuideAI-VerifiedMedicine

Mexiletine Side Effects

Complete guide to Mexiletine side effects — what's common, what's serious, which body systems are affected, and when to see a doctor.

Body impact map

Common
Serious
9+
Common effects
9+
Serious effects
5
Body systems

Common Side Effects

Usually mild · often resolve on their own

These side effects may occur in some patients taking Mexiletine. Most are mild and improve as your body adjusts. Tell your doctor if any persist or worsen.

Confusion (223)
Mental / Nervous
Vomiting (223)
Stomach / GI
Dyspnea (216)
Whole body
Arrhythmia (206)
Heart / Lungs
Edema (108)
Whole body
Diarrhea (108)
Stomach / GI
Depression (108)
Mental / Nervous
Pneumonia (24)
Whole body
Nervous (549)
Whole body
Pain (432)
Whole body

Serious Side Effects

Rare but urgent · seek immediate medical help

Stop taking Mexiletine and seek immediate medical help if any of the following occur. Call 112 for emergencies.

Emergency · 112
Blind (182)
Whole body
Stevens-Johnson syndrome (95)
Whole body
Fibrillation (12)
Whole body
Epidermal necrosis (7)
Whole body
Necrosis (7)
Whole body
Cardiac arrest (7)
Heart / Lungs
Hallucination (7)
Mental / Nervous
Renal failure (6)
Kidney
Ventricular fibrillation (6)
Whole body
Atrial fibrillation (6)
Whole body

Not a complete list. Report any unusual symptoms to your doctor immediately.

How to Minimize Side Effects

Simple steps that help

  • Take Mexiletine exactly as prescribed by your doctor — never change the dose yourself.
  • Follow dosage timing instructions carefully (with food / empty stomach / at bedtime as directed).
  • Do not stop Mexiletine suddenly without consulting your doctor — sudden discontinuation can be risky.
  • Report any new or unusual symptoms to your doctor promptly — early detection prevents complications.
  • Check drug interactions with GoDavaii AI before starting any new medicine, supplement, or even herbal remedy.
  • Avoid alcohol while on Mexiletine unless your doctor has confirmed it is safe.
AI-Verified · Cross-checked against 40,000+ interaction database

Not medical advice

Individual responses to Mexiletine vary — age, weight, existing conditions, and other medicines all matter. Always consult your doctor for personalized advice. For emergencies, call 112.

Frequently Asked Questions

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