Bisphosphonates are the most widely recommended first-line treatment for osteoporosis, backed by decades of safety data and proven ability to reduce fractures. But “best” depends on your fracture risk, age, and health history. For most people, treatment combines medication with the right nutrition and exercise, and the options range from a simple weekly pill to powerful bone-building injections reserved for severe cases.
Bisphosphonates: The Standard Starting Point
Clinical guidelines from both the Endocrine Society and the UK’s National Osteoporosis Guideline Group recommend bisphosphonates as the go-to initial treatment for postmenopausal women and others at high fracture risk. The most commonly prescribed oral options are alendronate, risedronate, and ibandronate, typically taken as a weekly or monthly pill. There’s also an intravenous form, zoledronic acid, given as an infusion once a year.
These drugs work by slowing down the cells that break down bone, letting your body hold onto more bone density over time. A large Danish cohort study found that using alendronate for more than 10 years was associated with a 30% lower risk of hip fracture. Oral bisphosphonates are generally prescribed for at least five years before your doctor reassesses whether you still need them. The intravenous version requires a minimum of three years.
The most common side effects of oral bisphosphonates are heartburn and irritation of the esophagus, which is why you’re told to take them first thing in the morning on an empty stomach and stay upright for at least 30 minutes. These side effects are manageable for most people, and the intravenous option sidesteps them entirely if you can’t tolerate the pills.
Drug Holidays: When to Pause Treatment
One advantage of bisphosphonates is that they accumulate in bone and keep working even after you stop taking them, which makes planned treatment breaks possible. After five years on oral bisphosphonates (or three years on the intravenous form), guidelines recommend a “drug holiday” for people whose fracture risk has dropped enough. For alendronate, the typical break lasts about two years. For zoledronic acid, about three years.
Not everyone qualifies for a break. If you’re 75 or older, have a history of hip or spinal fractures, still have very low bone density scores after treatment, or take high-dose steroid medications, continuing treatment is generally safer than pausing.
Denosumab: A Strong Alternative With a Catch
Denosumab is an injection given every six months that works differently from bisphosphonates. Instead of building up in bone, it blocks a protein signal that activates bone-breaking cells. The Endocrine Society recommends it as an alternative first-line option for people who can’t take bisphosphonates.
The catch is that you cannot simply stop taking it. After eight years of denosumab therapy, lumbar spine bone density can increase by nearly 17%, but stopping triggers a rebound effect where bone breaks down faster than it did before treatment even started. One study found that bone density in the spine dropped 6.7% in just the first year after stopping. Multiple spinal fractures have been reported in people who missed or discontinued their injections without a transition plan. If you need to stop denosumab, your doctor will typically switch you to a bisphosphonate to protect the bone you’ve gained.
Bone-Building Drugs for Severe Osteoporosis
If you’ve already had multiple fractures or your bone density is very low, guidelines recommend starting with a more aggressive approach: anabolic (bone-building) medications. These don’t just slow bone loss. They actively stimulate new bone formation.
The main options are teriparatide and abaloparatide, both daily injections given for up to two years, and romosozumab, a monthly injection given for up to one year. A network meta-analysis found that romosozumab and teriparatide are both more effective than bisphosphonates at reducing clinical and vertebral fractures. In a head-to-head comparison, romosozumab showed a 20% lower rate of major osteoporotic fractures compared to teriparatide over one year, along with lower rates of wrist, upper arm, and hip fractures.
Romosozumab works through a dual mechanism: it promotes bone formation while also slowing bone breakdown. In women who had previously taken alendronate, romosozumab was significantly better at increasing hip bone density at one year compared to teriparatide. However, romosozumab carries a warning about cardiovascular risk and isn’t recommended for people who’ve had a heart attack or stroke.
These bone-building drugs are always followed by a bisphosphonate or denosumab to lock in the gains. Without a follow-up treatment, the new bone is lost relatively quickly.
Rare but Serious Side Effects
Two side effects get the most attention: osteonecrosis of the jaw (where bone in the jaw deteriorates) and atypical femoral fractures (unusual breaks in the thigh bone). Both are linked to long-term use of bone-protecting medications.
For people taking standard osteoporosis doses of bisphosphonates, jaw osteonecrosis is uncommon, occurring in roughly 3% of patients in one large study. Denosumab carried a higher rate at about 12%, and people who switched from a bisphosphonate to denosumab had the highest rate at 16%. It’s worth noting that these rates come from a study of breast cancer patients who were often on higher doses and had additional risk factors. At the lower doses used for osteoporosis alone, the risk is considerably smaller, though dental health and planned dental procedures are still important to discuss with your doctor before starting treatment.
The risk of atypical thigh fractures increases with longer bisphosphonate use, which is one reason drug holidays exist. These fractures are rare but can happen with little or no trauma. Pain in the thigh or groin that develops during treatment should be evaluated promptly.
Hormonal Options for Younger Postmenopausal Women
For women under 60, or within 10 years of menopause, hormone therapy can prevent all types of osteoporotic fractures while also treating hot flashes and other menopausal symptoms. The Endocrine Society suggests it for women at high fracture risk who aren’t good candidates for bisphosphonates or denosumab, have no history of heart attack, stroke, or breast cancer, and have a low risk of blood clots.
Raloxifene and bazedoxifene are selective estrogen receptor modulators that protect bone without the full hormonal effects of estrogen. They reduce vertebral fractures specifically and may also lower breast cancer risk. Their main downside is an increased risk of blood clots, so they’re not suitable for everyone.
Calcium, Vitamin D, and Upper Limits
No osteoporosis medication works well without adequate calcium and vitamin D, which are the raw materials your bones need. Adults aged 19 to 50 need about 1,000 mg of calcium daily, while those over 51 need 1,000 to 1,200 mg. The recommended vitamin D intake is 600 IU per day for most adults, though many doctors prescribe higher amounts for people with documented deficiency.
Food sources are preferable to supplements when possible. Dairy products, fortified plant milks, leafy greens, and canned fish with bones all contribute meaningful calcium. If you supplement, keep total calcium intake (food plus supplements) below 2,500 mg daily if you’re under 50 and below 2,000 mg if you’re over 50. Very high calcium levels have been linked to kidney stones and possibly cardiovascular issues, so more is not better here.
Exercise That Strengthens Bone
Weight-bearing exercise works directly on bones in the legs, hips, and lower spine to slow bone loss. Walking, dancing, stair climbing, low-impact aerobics, and gardening all count because your skeleton is supporting your body weight against gravity. Strength training with free weights, resistance bands, or body weight adds another layer by building the muscles and tendons that support bone. Back-strengthening exercises are especially valuable for posture, which matters when spinal fractures are a concern.
You don’t need to train like an athlete. For strength exercises, one set of 12 to 15 repetitions is adequate for most people. Consistency matters more than intensity. If you already have osteoporosis, avoid high-impact activities and movements that involve deep forward bending or twisting at the waist, which can stress fragile vertebrae.