Parsabiv is used to treat overactive parathyroid gland (hyperparathyroidism) in adults with chronic kidney failure who are on dialysis.

Parsabiv may also be used for purposes not listed in this medication guide.

Before you receive Parsabiv, tell your doctor if you have taken cinacalcet within the past 7 days.

Parsabiv is given as an infusion into a vein. A healthcare provider will give you this injection as part of your dialysis treatment.

Parsabiv is usually given 3 times per week at the end dialysis.

Your doctor may occasionally change your dose amount or schedule.

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

You should not be treated with Parsabiv if you are allergic to it.

Tell your doctor if you have ever had:

• congestive heart failure;

• stomach or intestinal bleeding;

• a seizure;

• long QT syndrome (in you or a family member); or

• if you have used cinacalcet (Sensipar) within the past 7 days.

It is not known whether Parsabiv will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

You should not breast-feed while using this medicine.

Because you will receive Parsabiv in a clinical setting, you are not likely to miss a dose.

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

Overdose may cause calcium levels to get too low. Symptoms include muscle cramps, confusion, and numbness or tingling.

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

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

Parsabiv may cause serious side effects. Call your doctor at once if you have:

• a seizure (convulsions);

• shortness of breath (even with mild exertion), swelling, rapid weight gain;

• irregular heartbeats;

• low calcium levels--muscle spasms or contractions, numbness or tingly feeling (around your mouth, or in your fingers and toes); or

• signs of stomach bleeding--bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds.

Common side effects of Parsabiv may include:

• numbness or tingling;

• muscle spasms;

• low calcium;

• headache; or

• nausea, vomiting, diarrhea.

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.

Other drugs may affect Parsabiv, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.