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What is Mexitil (Mexiletine) prescribed for?

There are times when your heart’s electrical signals can make it speed up, even when you are not anxious or exercising. Most of the time it doesn’t cause any serious health issues. However a racing heartbeat can be quite frightening, especially when you don’t know what’s going on. At times you may even feel a drop in blood pressure, and feel dizzy or light headed.

This medication is used to treat a variety of serious, if possibly fatal, irregular heartbeat disorders. The medicine is used to help restore a normal heart rhythm and maintain a regular, steady heartbeat.

Mexitil is known as a anti-arrhythmic drug. It works by blocking out certain electrical signals in the heart that can cause the irregular heartbeat in the first place. Also treating an irregular heartbeat also decreases the risk of blood clots and in turn, this effect can reduce the risk of heart attack and stroke.

This medication is to be taken by mouth with a full glass of water, and is usually taken 2 to 3 times a day. If you doctor prescribes otherwise, take exactly as they have directed. This medication can be taken with food or antacids to help decrease some of the side effects such as, nausea and heartburn.

Remember the dosage is based on your age, liver function, medical condition and your overall response to the treatment. Use this medication on a regular basis to gain the most benefit.


Before taking this medication, it is best to advise your doctor if you are allergic to Mexiletine; or to any other medications or allergies in general.

Before taking this medication, it is for the best to inform you doctor of you Medical history. Especially of; other heart problems (such as heart failure, slow heartbeat, previous heart attack), liver problems, seizure disorder.

This drug may make you dizzy or blur your vision. Alcohol or marijuana (cannabis) can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).

Side Effects

Some of these side effects may occur when taking this medication; they are as follows; Nausea, vomiting, heartburn, dizziness, lightheadedness, vision problems (such as blurred vision), headache, shaking, nervousness, or problems with muscle control (coordination difficulties) may occur. However if any of these effects persist or worsen, contact your doctor right away.

Tell your doctor right away if any of these unlikely but serious side effects occur: worsening symptoms of heart failure (such as shortness of breath, swelling ankles/feet, unusual tiredness, unusual/sudden weight gain), signs of liver problems (such as persistent nausea/vomiting, stomach/abdominal pain, yellowing eyes/skin, dark urine).

Seek medical attention right away if any of the following is happening to you; chest pain, seizure.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.


What happens if I suddenly stop taking this medication?

There may be a relapse in symptoms as well as side effects. You should speak your doctor before stop taking this medication.


 What is the best dosage to take?

The diagnosis with your doctor will be able to determine the best dosage for your treatment. Work with your doctor closely for dosage and dosing schedules.


 What happens if I miss a dose?

You should take the missed dose as soon you realize you have forgotten. If the forgotten dose is closer to your next scheduled dose, take the next schedule dose to avoid overlapping in dose.


 What is the best way to store this medication?

This medication is stored at room temperature, and should be kept away from children and pets. Do not throw away this medication in the wastebasket. If you are uncertain how to dispose of this medication speak with your pharmacist for help in safely disposing of this medication.

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