Effer-K

• Nomax, Inc.

Your doctor should check your progress at regular visits to make sure the medicine is working properly and that possible side effects are avoided. Laboratory tests may be necessary.

Do not use salt substitutes, eat low-sodium foods, especially some breads and canned foods, or drink low-sodium milk unless you are told to do so by your doctor, since these products may contain potassium. It is important to read the labels carefully on all low-sodium food products.

Check with your doctor before starting any physical exercise program, especially if you are out of condition and are taking any other medicine. Exercise and certain medicines may increase the amount of potassium in the blood.

Check with your doctor at once if you notice blackish stools or other signs of stomach or intestinal bleeding. This medicine may cause such a condition to become worse, especially when taken in tablet form.

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Stop taking this medicine and check with your doctor immediately if any of the following side effects occur:

• Confusion
• irregular or slow heartbeat
• numbness or tingling in hands, feet, or lips
• shortness of breath or difficult breathing
• unexplained anxiety
• unusual tiredness or weakness
• weakness or heaviness of legs

Check with your doctor as soon as possible if any of the following side effects occur:

• Abdominal or stomach pain, cramping, or soreness (continuing)
• chest or throat pain, especially when swallowing
• stools with signs of blood (red or black color)

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

• Diarrhea
• nausea
• stomach pain, discomfort, or gas (mild)
• vomiting

Sometimes you may see what appears to be a whole tablet in the stool after taking certain extended-release potassium chloride tablets. This is to be expected. Your body has absorbed the potassium from the tablet and the shell is then expelled.

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

• Tell all of your health care providers that you take this medicine. This includes your doctors, nurses, pharmacists, and dentists.
• Have blood work checked as you have been told by the doctor. Talk with the doctor.
• You may need to have an ECG checked before starting Effer-K and while taking it. Talk with your doctor.
• Do not take more than what your doctor told you to take. Taking more than you are told may raise your chance of very bad side effects.
• If your diet has low-salt foods or you are taking a salt substitute, talk with your doctor.
• Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this medicine while you are pregnant.
• Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
• Signs of a high potassium level like a heartbeat that does not feel normal; change in thinking clearly and with logic; feeling weak, lightheaded, or dizzy; feel like passing out; numbness or tingling; or shortness of breath.
• Very upset stomach or throwing up.
• Swelling of belly.
• Black, tarry, or bloody stools.
• Throwing up blood or throw up that looks like coffee grounds.
• Very bad belly pain.