Classifications: hormone; parathyroid hormone agonist; Therapeutic: parathyroid hormone agonist
Pregnancy Category: C
750 mcg/3 mL injection
Parathyroid hormone (PTH) is the primary regulator of calcium and phosphate metabolism in bone and kidney. Actions of PTH
include regulation of bone metabolism, renal reabsorption of calcium and phosphate, and intestinal calcium absorption. Biological
actions of PTH and teriparatide are similar in bone and the kidneys.
Stimulates new bone formation by preferential stimulation of osteoblastic activity over osteoclastic activity; improves
bone microarchitecture, and increases bone mass and strength by stimulating new bone formation.
Treatment of osteoporosis in postmenopausal women at high risk for fracture; increase bone mass in men with primary or hypogonadal
osteoporosis who are at high risk for fracture.
Hypersensitivity to teriparatide; osteosarcoma; Paget's disease; unexplained elevations of alkaline phosphatase; bone metastases
or a history of skeletal malignancies; metabolic bone diseases other than osteoporosis; preexisting hypercalcemia; prior
history of radiation therapy involving the skeleton; pediatric patients or young adults with open epiphyses; children 18
y and younger; lactation; pregnancy (category C).
Active or recent urolithiasis, hypercalciuria; hypotension; concurrent use of digitalis; hepatic, renal, and cardiac disease.
Route & Dosage
Adult: SC 20 mcg q.d.
- Do not administer to anyone with hypercalcemia. Consult physician.
- Rotate SC injection sites.
Adverse Effects (≥1%)Body as a Whole: Pain,
asthenia, neck pain. CNS:
Headache, dizziness, depression
, vertigo. CV:
Hypertension, angina, syncope. GI:
, dyspepsia, vomiting. Metabolic: Transient increase in calcium levels,
increase in serum
uric acid, antibodies
to teriparatide after 12 mo therapy. Musculoskeletal: Arthralgia,
leg cramps. Respiratory:
Rhinitis, cough, pharyngitis, dyspnea
May increase risk of digoxin toxicity
Extensively absorbed from SC site. Onset:
2 h for calcium concentration increase. Peak:
Max. calcium concentrations 46 h. Duration:
1624 h. Metabolism:
Parathyroid hormone is metabolized non-specific enzymes. Elimination:
Primarily in urine. Half-Life:
1 h SC.
Assessment & Drug Effects
- Monitor cardiovascular status including BP and subjective reports of angina.
- Lab tests: Monitor periodically serum calcium, alkaline phosphatase, uric acid and bone density levels.
- Concurrent drugs: Monitor closely for digoxin toxicity with concurrent use.
Patient & Family Education
- Report unexplained leg cramps and bone pain.
- Learn correct technique for SC injection.