Reclast vs. Forteo

See how Reclast and Forteo compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Reclast is a once-a-year (or once-every-two-years) IV infusion, while Forteo is a daily self-injection you give yourself at home.

  • Reclast slows bone breakdown, while Forteo is one of the few therapies that actually builds new bone, so doctors often choose based on how severe the osteoporosis is.

  • Forteo's list price runs far higher per month than Reclast's per-infusion cost, which can be a major factor in choosing between them.

Reclast vs. Forteo Drug Summary

Reclast

Reclast (zoledronic acid) is a bisphosphonate given as an IV infusion that slows the breakdown of bone. It treats and prevents osteoporosis after menopause, increases bone mass in men, treats glucocorticoid-induced osteoporosis, and treats Paget's disease of bone. Most patients get one infusion a year, or once every two years for prevention.

Forteo

Forteo (teriparatide) is a parathyroid hormone analog given as a daily self-injected pen that builds new bone rather than just slowing bone loss. It's approved for postmenopausal women, men with primary or hypogonadal osteoporosis, and people on long-term glucocorticoids, all at high fracture risk. Because it's an anabolic agent, it's often reserved for more severe or high-risk cases.

Reclast vs. Forteo Side Effects

Reclast

Most common
myalgia (up to 17%)
fever (up to 16%)
fatigue (up to 12%)
arthralgia (up to 11%)

Forteo

Most common
pain (up to 21.3%)
arthralgia (up to 10.1%)
asthenia (up to 8.7%)
nausea (up to 8.5%)

Reclast vs. Forteo Dosage

Reclast

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 5 mg IV infusion At the start
Maximum dose 5 mg IV infusion Same as starting
Dose changes None Fixed dose

Forteo

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mcg once daily At the start
Maximum dose 20 mcg once daily Same as starting
Dose changes None Fixed dose

Reclast vs. Forteo Indications

Reclast

Reclast is FDA-approved to treat and prevent osteoporosis in postmenopausal women, increase bone mass in men with osteoporosis, and treat or prevent glucocorticoid-induced osteoporosis. It's also approved for Paget's disease of bone. Doctors often choose it for patients who want to avoid daily pills or injections.

  • Treatment of osteoporosis in postmenopausal women

  • Prevention of osteoporosis in postmenopausal women

  • Increase bone mass in men with osteoporosis

  • Treatment and prevention of glucocorticoid-induced osteoporosis

Forteo

Forteo treats osteoporosis in postmenopausal women and men at high fracture risk, and glucocorticoid-induced osteoporosis in men and women at high risk. It is not approved for patients with open growth plates or other conditions that raise the baseline risk of bone cancer. This makes it an option mainly for people who need active bone-building rather than maintenance.

  • Osteoporosis in postmenopausal women at high fracture risk

  • Osteoporosis in men at high fracture risk

  • Glucocorticoid-induced osteoporosis in high-risk patients

  • Not approved for patients with open growth plates

Reclast vs. Forteo Pros and Cons

Reclast

Reclast's once-a-year or once-every-two-years infusion suits patients who struggle with daily routines, but it must be given in a clinic and requires adequate kidney function. It slows bone breakdown rather than building new bone, so it may be less suited to people with already severe osteoporosis.

Pros

  • Only 1 infusion needed per year, or every 2 years for prevention

  • No at-home needles or daily routine to remember

  • Roughly $600 to $1,600 per infusion without insurance, far less than a year of Forteo

  • Decades of use as an established bisphosphonate

Cons

  • Must be given by IV infusion at a clinic or hospital

  • Common flu-like reaction (fever, muscle aches) in the days after infusion

  • Not for patients with significant kidney impairment

  • Only slows bone loss, does not build new bone

Forteo

Forteo actively builds new bone, making it an option for patients with severe osteoporosis or those who have already fractured on other therapies. It requires a daily self-injection and carries one of the higher price tags among osteoporosis treatments.

Pros

  • Builds new bone rather than only slowing bone loss

  • Option for men with primary or hypogonadal osteoporosis

  • No infusion-related flu-like reaction

  • Self-injected at home, no clinic visit required for dosing

Cons

  • Requires a self-injection every single day

  • Roughly $4,590 to $5,100 per month without insurance, far more than Reclast's annual cost

  • Early doses can cause a brief drop in blood pressure when standing

  • Avoided in patients at increased baseline risk of bone cancer

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