Fosamax vs. Boniva

See how Fosamax and Boniva compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Fosamax and Boniva are both bisphosphonates that slow bone loss, but Fosamax has broader FDA approval, including for men and Paget's disease of bone.

  • Fosamax is taken daily or weekly, while Boniva is taken just once a month, which some patients find easier to remember.

  • Both drugs carry the same class warnings, including esophageal irritation and rare jaw bone problems, and both require staying upright after dosing.

Fosamax vs. Boniva Drug Summary

Fosamax

Fosamax (alendronate) is an oral bisphosphonate that treats and prevents osteoporosis in postmenopausal women, treats osteoporosis in men, and treats glucocorticoid-induced osteoporosis and Paget's disease of bone. It comes as a daily or weekly tablet, taken first thing in the morning on an empty stomach with plain water.

Boniva

Boniva (ibandronate) is an oral bisphosphonate approved to treat and prevent osteoporosis in postmenopausal women. It's taken as a single 150 mg tablet once a month, first thing in the morning on an empty stomach with plain water.

Fosamax vs. Boniva Side Effects

Fosamax

Most common
dyspepsia (1% to 10%)
diarrhea (1% to 10%)
abdominal pain (1% to 10%)
acid regurgitation (1% to 10%)

Boniva

Most common
dyspepsia (>5%)
diarrhea (>5%)
back pain (>5%)
pain in extremity (>5%)

Fosamax vs. Boniva Dosage

Fosamax

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 5 mg once daily At the start
Maximum dose 70 mg once weekly If needed
Dose changes 4 increases As tolerated

Boniva

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 150 mg once monthly At the start
Maximum dose 150 mg once monthly Same as starting
Dose changes None Fixed dose

Fosamax vs. Boniva Indications

Fosamax

Fosamax covers the widest range of bisphosphonate uses, from preventing and treating osteoporosis in postmenopausal women to treating osteoporosis in men. It's also approved for glucocorticoid-induced osteoporosis and Paget's disease of bone, conditions Boniva does not cover.

  • Treatment of osteoporosis in postmenopausal women

  • Prevention of osteoporosis in postmenopausal women

  • Treatment to increase bone mass in men with osteoporosis

Boniva

Boniva is approved only for postmenopausal osteoporosis, both to treat and to prevent it. It doesn't carry indications for men, glucocorticoid-induced bone loss, or Paget's disease.

  • Treatment of osteoporosis in postmenopausal women

  • Prevention of osteoporosis in postmenopausal women

  • Not approved for osteoporosis in men or other bone conditions

Fosamax vs. Boniva Pros and Cons

Fosamax

Fosamax has the broadest approved use of any oral bisphosphonate and decades of real-world safety data behind it. It offers daily and weekly dosing options, letting patients and doctors pick a schedule that fits.

Pros

  • Approved for a wider range of conditions, including Paget's disease and osteoporosis in men

  • Offers both daily and weekly dosing options to fit different routines

  • Longest track record of any oral bisphosphonate, approved since 1995

Cons

  • Requires more frequent dosing (daily or weekly) than Boniva's once-monthly schedule

  • More strengths and schedules to keep track of than Boniva's single dose

  • Oral solution option requires careful handling for those with swallowing difficulty

Boniva

Boniva's main appeal is simplicity: one tablet, once a month, with no choice of strength to manage. Its approved use is narrower than Fosamax's, limited to postmenopausal osteoporosis.

Pros

  • Only needs to be taken once a month, the least frequent oral bisphosphonate schedule

  • Single flat dose with no titration or strength choices to manage

  • Only one tablet to keep track of each month, unlike Fosamax's multiple strengths

Cons

  • Only approved for postmenopausal women, not for men or other bone diseases

  • Requires standing upright for 60 minutes after dosing, longer than Fosamax's 30 minutes

  • No daily dosing option if a monthly dose is missed or not well tolerated

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