Tocainide Hydrochloride (Oral) (Tonocard) - Drugs Information, Side Effects, & Interactions

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Tocainide Hydrochloride (toe-KAY-nide hye-droe-KLOR-ide)

Treats irregular heartbeats (arrhythmias). Belongs to the group of drugs called class antiarrhythmics.

Tonocard
There may be other brand names for this medicine.

You should not use this medicine if you have had an allergic reaction to tocainide, mexiletine, or lidocaine in the past.

Tablet

Take this medicine exactly as your doctor ordered, even if you feel fine.
May be taken with food or milk to lessen stomach upset.
You may need to carry identification saying that you are taking tocainide. Ask you doctor about this.

If a dose is missed:

Take the missed dose as soon as you can, unless you are more than 4 hours late.
If more than 4 hours late, skip the missed dose and take your medicine at your usual time.
You should not use two doses at the same time.

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Make sure your doctor knows if you are taking cimetidine (Tagamet®), or other heart medicines such as Inderal® or Lopressor®.

Check with your doctor before taking tocainide if you have heart (congestive heart failure), kidney, or liver disease.
Tell your doctor or dentist that you are taking tocainide before having any kind of surgery.
Do not suddenly stop taking this medicine without checking with your doctor.
Talk with your doctor before use if you are pregnant or breastfeeding.
Tocainide makes some people dizzy or drowsy, be careful if you drive a car or operate machinery.

Call your doctor right away if you notice any of these side effects:

If you notice these less serious side effects, talk with your doctor:

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