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Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Mexitil Patient Information Including Side Effects

Brand Names: Mexitil

Generic Name: mexiletine (Pronunciation: mex IL e teen)

What is mexiletine (Mexitil)?

Mexiletine affects the way that your heart beats.

Mexiletine is used to treat seriously irregular heartbeats.

Mexiletine may also be used for purposes other than those listed in this medication guide.

Mexiletine 150 mg-TEV

capsule, brown/orange, imprinted with N 739, 150

Mexiletine 200 mg-TEV

capsule, orange, imprinted with N 740, 200

Mexiletine 250 mg-TEV

capsule, blue/orange, imprinted with N 741, 250

What are the possible side effects of mexiletine (Mexitil)?

If you experience any of the following serious side effects, stop taking mexiletine and seek emergency medical attention:

  • an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);
  • a new or a worsening irregular heartbeat pattern;
  • wheezing, coughing, chest pain, or chest discomfort;
  • unusual bruising or bleeding; or
  • fever, sore throat, a sore mouth, mouth ulcers, or an infection.

Other, less serious side effects may be more likely to occur. Continue to take mexiletine and talk to your doctor if you experience

  • dizziness, lightheadedness, or tiredness;
  • poor coordination;
  • dry mouth;
  • upset stomach, heartburn, vomiting, or decreased appetite;
  • diarrhea or constipation;
  • headache or blurred vision;
  • weakness;
  • numbness, tingling, or tremor (shaking);
  • ringing in your ears;
  • a rash; or
  • depression.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may report side effects to FDA at 1-800-FDA-1088.

Read the Mexitil (mexiletine hcl) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about mexiletine (Mexitil)?

Do not skip doses, change your dosing schedule, or stop taking mexiletine without talking to your doctor. Changing your schedule could make your condition much worse.

Use caution when driving, operating machinery, or performing other hazardous activities. Mexiletine may cause dizziness, drowsiness, or blurred vision. If you experience dizziness, drowsiness, or blurred vision, avoid these activities.

Side Effects Centers

Mexitil - User Reviews

Mexitil User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Mexitil sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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