Effer-K

Potassium is a mineral that occurs naturally in foods and is essential for the normal functioning of your heart, muscles, and nerves.

Effer-K is used to treat or prevent low potassium (hypokalemia).

Effer-K may also be used for reasons not mentioned in this medication guide.

Use exactly as directed on the label, or as prescribed by your doctor.

Drop the effervescent tablet into a glass with at least 4 ounces of water. Allow the tablet to dissolve completely. Drink the liquid slowly, over 5 to 10 minutes.

Take your doses at regular intervals to keep a steady amount of potassium in your body at all times.

Take Effer-K with food or after a meal.

You may need frequent medical tests. Even if you have no symptoms, tests can help your doctor determine if Effer-K is effective.

You should not stop using Effer-K without first asking your doctor.

Store this medicine in the original packaging at room temperature away from moisture and heat. Keep each tablet in the foil pouch until you are ready to use the medicine.

You should not use Effer-K if you also take a potassium-sparing diuretic such as amiloride, eplerenone, spironolactone, or triamterene.

You should not use Effer-K if:

• you have high levels of potassium in your blood; or
• you also take a potassium-sparing diuretic such as amiloride, eplerenone, spironolactone, or triamterene.

Ask a doctor or pharmacist if this medicine is safe to use if you have ever had:

• heart problems, irregular heartbeats;
• diabetes;
• a severe burn injury;
• an ulcer or other problems with your stomach or intestines;
• Addison's disease (an adrenal gland disorder);
• an allergic reaction to a product that contains potassium;
• kidney disease; or
• if you are dehydrated.

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

Do not give this medicine to a child without medical advice.

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Effer-K may cause serious side effects. Stop using Effer-K and call your doctor at once if you have:

• confusion;
• fast or irregular heartbeats;
• a light-headed feeling, like you might pass out;
• weakness or a heavy feeling in your legs;
• numbness or tingling in your hands or feet;
• unusual tiredness;
• trouble breathing;
• black, bloody, or tarry stools;
• severe stomach pain or cramping; or
• high potassium--nausea, weakness, tingly feeling, chest pain, irregular heartbeats, or loss of movement.

Common side effects of Effer-K may include:

• nausea, vomiting;
• diarrhea; or
• upset stomach.

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.

Take the medicine as soon as you can, but skip the missed dose if it is nearly time for your next dose. Do not take two doses at the same time.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Avoid using other potassium supplements, salt substitutes, or low-sodium foods unless your doctor has instructed you to.

Ask a doctor or pharmacist before using Effer-K with any other medications, especially:

• heart or blood pressure medication;
• a diuretic or "water pill"; or
• NSAIDs (nonsteroidal anti-inflammatory drugs)--aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve), celecoxib, diclofenac, indomethacin, meloxicam, and others.

This list is not complete. Other drugs may affect Effer-K, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.