Forteo (Teriparatide) Supply for 3 Months
For a 3-month supply of Forteo (teriparatide), 3 pens are needed as each pen contains a 28-day supply.
Dosage and Administration Details
Teriparatide (Forteo) is administered as a once-daily subcutaneous injection of 20 mcg into the thigh or abdominal region 1. Each pen is designed for specific duration of use:
- Each Forteo pen contains 620 mcg/2.48 mL (250 mcg/mL) of teriparatide solution 1
- Each pen delivers exactly 28 daily doses of 20 mcg 2
- For a 3-month period (approximately 90-92 days), 3 complete pens are required
Calculation Breakdown
- Daily dose: 20 mcg per day
- Each pen contains: 28 daily doses
- Number of days in 3 months: approximately 90-92 days
- Calculation: 90 ÷ 28 = 3.21 pens
Therefore, 3 complete pens are needed for a 3-month supply, with a few days remaining on the fourth pen that would need to be started.
Important Administration Instructions
- Forteo must be stored under refrigeration at 2°C to 8°C (36°F to 46°F) at all times 1
- The pen should be recapped when not in use to protect from physical damage and light 1
- Minimize time out of refrigerator; administer dose immediately after removal 1
- Each pen can only be used for up to 28 days, after which it must be discarded even if solution remains 1
- Patients should be instructed to take supplemental calcium and vitamin D if dietary intake is inadequate 1
Common Pitfalls to Avoid
- Do not freeze Forteo or use if it has been frozen 1
- Do not transfer contents of the pen to a syringe 1
- Do not share pens between patients 1
- Do not use beyond the 28-day period per pen, even if medication remains 1
- Do not use after the expiration date printed on the pen 1
Remember that teriparatide is indicated for treatment of osteoporosis in postmenopausal women at high risk for fracture, men with primary or hypogonadal osteoporosis, and patients with glucocorticoid-induced osteoporosis 1.