Use:  Mexiletine affects the way that your heart beats; is used to treat seriously irregular heartbeats. May also be used for purposes other than those listed in this medication guide.

Possible Side Effects: Symptoms of a mexiletine overdose include nausea, seizures, numbness or tingling, tiredness, dizziness, a loss of consciousness, and a worsening irregular heartbeat. Other, less serious side effects may be more likely to occur They include dizziness, lightheadedness, or tiredness; poor coordination; dry mouth; upset stomach, heartburn, vomiting, or decreased appetite; diarrhea or constipation; weakness; rash.

Directions: Use mexiletine exactly as directed by the doctor. Give each dose with water. Taking mexiletine with food or an antacid to lessen stomach upset. Do not skip doses, change the dosing schedule, or stop taking mexiletine without talking to the doctor.

Storage:  Keep in the original container. Keep out of the reach of children and pets. Capsules and tablets may be stored at room temperature. Some liquids should be stored in the refrigerator (see the prescription label.)  Store all medicines away from excess heat and moisture. Do NOT store in the bathroom.

Note: If you miss a dose give it as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue with the regular schedule. Do not give a double dose to make up for the missed one.