Actonel vs. Forteo

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

Key Takeaways

  • Actonel is an oral bisphosphonate that slows bone breakdown, while Forteo is an injectable hormone therapy that actively builds new bone.

  • Actonel offers flexible daily, weekly, or monthly dosing, while Forteo requires a daily injection with no dosing alternatives.

  • Actonel costs a fraction of Forteo's monthly price, but Forteo may be preferred for patients at very high fracture risk who need bone-building therapy.

Actonel vs. Forteo Drug Summary

Actonel

Actonel (risedronate) is an oral bisphosphonate that slows bone breakdown to treat and prevent osteoporosis in postmenopausal women, men, and patients on long-term glucocorticoids. It's taken as a pill on a daily, weekly, twice-monthly, or monthly schedule, depending on the regimen chosen.

Forteo

Forteo (teriparatide) is an injectable parathyroid hormone analog that actively builds new bone, used for postmenopausal women, men, and glucocorticoid-induced osteoporosis at high fracture risk. It's given as a once-daily subcutaneous injection using a prefilled pen.

Actonel vs. Forteo Side Effects

Actonel

Most common
pain in extremity (up to 21%)
headache (up to 20%)
back pain (up to 17%)
generalized pain (up to 15%)

Forteo

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

Actonel vs. Forteo Dosage

Actonel

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 5 mg once daily At the start
Maximum dose 150 mg once monthly If needed
Dose changes 4 increases As tolerated

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

Actonel vs. Forteo Indications

Actonel

Actonel is a bisphosphonate used to treat and prevent osteoporosis in postmenopausal women, increase bone mass in men, and manage glucocorticoid-induced bone loss. It's also one of the few therapies approved for Paget's disease of bone.

  • Treatment and prevention of postmenopausal osteoporosis

  • Increase bone mass in men with osteoporosis

  • Treatment and prevention of glucocorticoid-induced osteoporosis

Forteo

Forteo is a bone-building parathyroid hormone therapy for men and women with osteoporosis who are at high risk of fracture. It's approved for postmenopausal women, men with primary or hypogonadal osteoporosis, and glucocorticoid-induced bone loss.

  • Postmenopausal osteoporosis with high fracture risk

  • Increase bone mass in men with primary or hypogonadal osteoporosis

  • Glucocorticoid-induced osteoporosis at high risk of fracture

Actonel vs. Forteo Pros and Cons

Actonel

Actonel is a well-established oral bisphosphonate with decades of safety data and multiple dosing options to fit different routines. As a generic, it's far less expensive than anabolic options like Forteo, though it works by slowing bone loss rather than building new bone.

Pros

  • Oral tablet, no injections needed

  • Multiple dosing schedules (daily, weekly, monthly)

  • Approved for Paget's disease, unlike Forteo

Cons

  • Requires strict routine: empty stomach, upright 30+ minutes

  • Risk of esophageal irritation and rare jaw osteonecrosis

  • Antiresorptive only, doesn't build new bone like Forteo

Forteo

Forteo actively builds new bone rather than just slowing its breakdown, making it a good option for patients at high fracture risk who haven't responded to other therapies. It requires a daily injection and costs significantly more than oral bisphosphonates like Actonel.

Pros

  • Builds new bone rather than just slowing loss

  • No boxed warning since the 2021 label update removed it

  • Simple once-daily injection with no food or timing rules

Cons

  • Daily injection, which some patients find inconvenient

  • Not for use in Paget's disease or those at osteosarcoma risk

  • Roughly $4,590 to $5,100 per month without insurance, much higher than Actonel

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