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Takeda will discontinue global manufacturing of NATPARA by the end of 2024. Learn How This May Affect You
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NATPARA is a prescription parathyroid hormone used with calcium and vitamin D to control low blood calcium (hypocalcemia) in people with low parathyroid hormone blood levels (hypoparathyroidism). It is only for people who do not respond well to treatment with calcium and active forms of vitamin D alone, because it may increase the possible risk of bone cancer (osteosarcoma).

NATPARA was not studied in people with hypoparathyroidism caused by calcium-sensing receptor mutations. It was not studied in people who get sudden hypoparathyroidism after surgery. It is not known if NATPARA is safe and effective for children 18 years of age and younger. NATPARA should not be used in children and young adults whose bones are still growing.

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NATPARA is a prescription parathyroid hormone used with calcium and vitamin D to control low blood calcium (hypocalcemia) in people with low parathyroid hormone blood levels (hypoparathyroidism). It is only for people who do not respond well to treatment with calcium and active forms of vitamin D alone, because it may increase the possible risk of bone cancer (osteosarcoma).

NATPARA was not studied in people with hypoparathyroidism caused by calcium-sensing receptor mutations. It was not studied in people who get sudden hypoparathyroidism after surgery. It is not known if NATPARA is safe and effective for children 18 years of age and younger. NATPARA should not be used in children and young adults whose bones are still growing.

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A look at hypoparathyroidism

Parathyroid hormone

Most people have 4 parathyroid glands located behind the thyroid gland in the neck. The glands release parathyroid hormone (PTH), which controls the levels of calcium and vitamin D in the blood.

Parathyroid glands behind the thyroid.

Most people have 4 parathyroid glands located behind the thyroid gland in the neck. The glands release parathyroid hormone (PTH), which controls the levels of calcium and vitamin D in the blood.

Image shows placement of parathyroid glands behind the thyroid.

  • Parathyroid glands are located behind the thyroid gland in the neck
  • Each gland is small, about 3 to 5 millimeters in diameter

How did I get hypoparathyroidism?

Hypoparathyroidism is a rare disorder that mainly occurs when the parathyroid glands are damaged either due to surgery, an autoimmune disease, or a genetic disorder and are not able to produce enough PTH. In some patients, doctors are not able to tell the cause of the disorder.

Not having enough PTH can interfere with important functions of certain organs in the body. Talk to your doctor if you are experiencing symptoms. Your doctor will take blood tests to ensure your calcium levels are within a target range.

Since hypoparathyroidism can be caused by accidental damage to the parathyroid glands or their blood supply during removal of the thyroid, it is usually detected after surgery of the thyroid or parathyroid glands. Some patients may continue to have low levels of PTH and blood calcium 6 months after surgery and beyond. This is called chronic hypoparathyroidism.

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Getting started on
NATPARA (parathyroid hormone) for Injection

Find out how Takeda supports you in starting treatment with NATPARA, including individual, at-home injection training.

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Important Safety Information

What is the most important information I should know about NATPARA?

Warning: Possible bone cancer (osteosarcoma).

  • During animal drug testing, NATPARA caused some rats to develop a bone cancer called osteosarcoma.
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Important Safety Information

What is the most important information I should know about NATPARA?

Warning: Possible bone cancer (osteosarcoma).

  • During animal drug testing, NATPARA caused some rats to develop a bone cancer called osteosarcoma. It is not known if people who take NATPARA will have a higher chance of getting osteosarcoma. Tell your doctor right away if you have pain in any areas of your body that does not go away, or any new or unusual lumps or swelling under your skin that is tender to touch.
  • NATPARA is only available through the NATPARA Risk Evaluation and Mitigation Strategy (REMS) Program. The purpose of the NATPARA REMS program is to inform patients about the potential risk of osteosarcoma associated with the use of NATPARA. For more information about this REMS program, call 1-855-NATPARA (628-7272) or go to www.NATPARAREMS.com.

NATPARA may cause other serious side effects, including:

High blood calcium (hypercalcemia)

  • NATPARA can cause some people to have a higher blood calcium level than normal.
    • Your doctor should check your blood calcium before you start and during your treatment with NATPARA.
    • Tell your doctor if you have nausea, vomiting, constipation, low energy, or muscle weakness. These may be signs that you have too much calcium in your blood.

Low blood calcium (hypocalcemia)

  • People who stop using or miss a dose of NATPARA may have an increased risk of severe low blood calcium levels.
  • Tell your doctor if you have tingling of your lips, tongue, fingers and feet, twitching of face muscles, cramping of feet and hands, seizures, depression, or have problems thinking or remembering.

Tell your doctor right away if you have any of these signs and symptoms of high or low blood calcium levels.

Who should not use NATPARA?

  • Do not use NATPARA if you are allergic to parathyroid hormone or any of the ingredients in NATPARA.

What should I tell my healthcare provider before using NATPARA?

  • Before you start using NATPARA, tell your doctor about all of your medical conditions. Tell your doctor about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

What are the possible side effects of NATPARA?

  • NATPARA may cause serious side effects like allergic (hypersensitivity) reaction, including anaphylaxis. Tell your healthcare provider or get emergency medical help right away if you have any of the following symptoms of an allergic reaction:
    • swelling of your face, lips, mouth, or tongue
    • breathing problems
    • fainting, dizziness, feeling lightheaded (low blood pressure)
    • fast heartbeat
    • itching
    • rash
    • hives
  • The most common side effects of NATPARA include: tingling, tickling, or burning feeling of the skin, low or high blood calcium, headache, nausea, reduced sense of touch or sensation, diarrhea, vomiting, pain in joints, too much calcium in urine, and pain in limbs.

These are not all the possible side effects of NATPARA. For more information, talk with your doctor.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088.

Please see Prescribing Information, Medication Guide, and Instructions for Use.