Alternatives to Alendronate: What Are Your Options?

Alendronate (brand names Fosamax and Binosto) is the most commonly prescribed bisphosphonate for osteoporosis, but it's not the only option. Whether you can't find it in stock, can't tolerate the side effects, or have a medical reason to avoid it, there are several effective alternatives your doctor can prescribe.

Before switching medications, always talk to your doctor. This guide is meant to help you understand your options so you can have an informed conversation with your healthcare provider.

Other Bisphosphonates (Same Drug Class)

Bisphosphonates all work in a similar way — they slow down the bone-breaking cells (osteoclasts) to help maintain bone density. If Alendronate isn't available or doesn't agree with you, these are the most direct alternatives:

Risedronate (Actonel, Atelvia)

• How it works: Same mechanism as Alendronate — inhibits osteoclast activity
• Dosing options: 5 mg daily, 35 mg weekly, 75 mg on two consecutive days per month, or 150 mg once monthly
• Key difference: The monthly 150 mg option is convenient for patients who find weekly dosing difficult. Some studies suggest slightly fewer GI side effects than Alendronate.
• Cost: Generic risedronate is available. With coupons, the 35 mg weekly tablet costs approximately $15-$50 for 4 tablets.
• Availability: Widely available at most pharmacies

Ibandronate (Boniva)

• How it works: Bisphosphonate that reduces bone resorption
• Dosing options: 150 mg oral tablet once monthly, or 3 mg intravenous (IV) injection every 3 months
• Key difference: Monthly oral dosing or quarterly IV injections are great for patients who struggle with weekly pills. The IV option eliminates GI side effects entirely.
• Cost: Generic ibandronate tablets are available. The IV version may be more expensive and is administered in a doctor's office.
• Note: Primarily proven to reduce vertebral fractures. Evidence for hip fracture reduction is less robust than for Alendronate.

Zoledronic Acid (Reclast)

• How it works: The most potent bisphosphonate, given as an IV infusion
• Dosing: 5 mg IV infusion once per year for osteoporosis treatment
• Key difference: Once-yearly dosing is the most convenient option. Eliminates GI side effects since it bypasses the stomach entirely. Given in a doctor's office or infusion center.
• Cost: More expensive than oral options. Typical cost is $200-$1,000+ per infusion, though insurance usually covers most of it.
• Best for: Patients who can't tolerate oral bisphosphonates, have esophageal problems, or have trouble with the strict dosing requirements of oral medications

Non-Bisphosphonate Alternatives

If bisphosphonates as a class aren't right for you, there are other effective osteoporosis treatments:

Denosumab (Prolia)

• How it works: A monoclonal antibody that blocks RANKL, a protein involved in bone breakdown. Different mechanism than bisphosphonates.
• Dosing: 60 mg subcutaneous injection every 6 months, given in a doctor's office
• Key difference: No GI side effects, no esophageal concerns, no need to stay upright after dosing
• Important warning: Do not skip or delay doses. Stopping Denosumab can cause rapid bone loss (rebound effect) and increased fracture risk.
• Cost: More expensive — approximately $1,000-$1,800 per injection without insurance. Most insurance plans cover it with prior authorization.

Raloxifene (Evista)

• How it works: A selective estrogen receptor modulator (SERM) that mimics estrogen's bone-protective effects
• Dosing: 60 mg daily oral tablet
• Key difference: Also reduces breast cancer risk. Only proven to reduce vertebral fracture risk, not hip fractures.
• Cost: Generic available, approximately $20-$60 per month
• Not for: Patients with a history of blood clots

Teriparatide (Forteo) and Abaloparatide (Tymlos)

• How they work: Parathyroid hormone analogs that stimulate new bone formation (anabolic agents)
• Dosing: Daily subcutaneous self-injection
• Key difference: These actually build new bone rather than just slowing bone loss. Typically reserved for severe osteoporosis or patients who have fractures despite bisphosphonate therapy.
• Cost: Very expensive — $2,000-$3,500 per month without insurance
• Duration: Limited to 2 years of use

Romosozumab (Evenity)

• How it works: A monoclonal antibody that both builds bone and reduces bone breakdown
• Dosing: Monthly subcutaneous injection for 12 months, administered in a doctor's office
• Key difference: One of the newest and most effective osteoporosis treatments, but carries a boxed warning for cardiovascular risk
• Cost: Very expensive — approximately $1,800-$2,200 per month

How to Choose the Right Alternative

The best alternative depends on your specific situation:

• If Alendronate is temporarily unavailable: Risedronate is the most similar option and easiest to switch to
• If you have stomach or esophageal problems: Zoledronic acid (IV) or Denosumab (injection) eliminate GI concerns
• If you want less frequent dosing: Zoledronic acid (yearly) or Denosumab (every 6 months)
• If you have severe osteoporosis: Teriparatide, Abaloparatide, or Romosozumab may be appropriate
• If cost is a concern: Generic Risedronate or Raloxifene are the most affordable alternatives

For more about how Alendronate works and why it's prescribed, see our guide on Alendronate's mechanism of action.

Before You Switch: Try Finding Alendronate First

If you're switching because you can't find Alendronate, it may be worth checking additional pharmacies first. Use MedFinder to see which pharmacies near you have it in stock — you might find it closer than you think.

Also check out our tips on how to find Alendronate in stock near you and our guide to saving money on Alendronate.

The Bottom Line

Alendronate is an excellent first-line osteoporosis medication, but it's far from the only option. Whether you need a different bisphosphonate, an injectable treatment, or a bone-building medication, there are effective alternatives available. Work with your doctor to find the right fit for your bone health needs.