Headache, body aches, cough, or injection site irritation/pain may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Epoetin alfa may sometimes cause or worsen high blood pressure, especially in patients with long-term kidney failure. This effect may be caused by the number of red blood cells increasing too quickly, usually within the first 3 months of starting treatment. If you have high blood pressure, it should be well controlled before beginning treatment with this medication. Your blood pressure should be checked often. Ask your doctor if you should learn how to check your own blood pressure. If high blood pressure develops or worsens, follow your doctor's instructions about diet changes and starting or adjusting your high blood pressure medication. Lowering high blood pressure helps prevent strokes, heart attacks, and further kidney problems. Keep all lab appointments to have your red blood cell count/hemoglobin level tested regularly to reduce the chance of this side effect.

Rarely, this medication may suddenly stop working well after a period of time because your body may make antibodies to it. A very serious anemia can result. Tell your doctor right away if symptoms of anemia return (such as increased tiredness, low energy, pale skin color, shortness of breath).

Tell your doctor right away if you have any serious side effects, including: symptoms of heart failure (such as shortness of breath, swelling ankles/feet, unusual tiredness, unusual/sudden weight gain).

Get medical help right away if you have any very serious side effects, including: seizures.

This medication may rarely cause serious (sometimes fatal) problems from blood clots (such as heart attack, stroke, blood clots in the legs or lungs). You may be at increased risk for blood clots if you are severely dehydrated, or have a history of blood clots, heart/blood vessel disease, heart failure, stroke, pregnant, or if you are immobile (such as on very long plane flights or being bedridden). If you use estrogen-containing products, these may also increase your risk. Before using this medication, if you have any of these conditions report them to your doctor or pharmacist. Get medical help right away if you have: shortness of breath/rapid breathing, chest/jaw/left arm pain, unusual sweating, confusion, sudden dizziness/fainting, pain/swelling/warmth in the groin/calf, sudden/severe headaches, trouble speaking, weakness on one side of the body, sudden vision changes, blood clots in your hemodialysis vascular access site.

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.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.