Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Teriparatide (Forteo) and tamoxifen (Soltamox, formerly Nolvadex) are both prescription medications, but they belong to different medication classes and treat different conditions. Teriparatide is a parathyroid hormone analog used to treat osteoporosis in postmenopausal women, men, and those with osteoporosis due to long-term corticosteroid use. It is administered as a daily injection. Tamoxifen, on the other hand, is a selective estrogen receptor modulator (SERM) used to treat hormone receptor-positive (HR+) breast cancer and to lower the risk of breast cancer in high-risk women. It is taken orally as a tablet or solution (Soltamox), usually once a day. While teriparatide is only available as a brand-name medication, tamoxifen is available as a lower-cost generic. Common side effects of teriparatide include body pain and joint pain, whereas tamoxifen can cause hot flashes and vaginal discharge. Teriparatide can interact with digoxin (Lanoxin), while tamoxifen can interact with alcohol and many other medications. Additionally, teriparatide has a treatment limit of two years due to potential cancer risks, while tamoxifen is often taken for 5 to 10 years.
Forteo (teriparatide)
Tamoxifen (Nolvadex)
Forteo (teriparatide)
Tamoxifen (Nolvadex)
Summary of Forteo vs. Nolvadex
Summary for Parathyroid hormone analog
Prescription only
Forteo (teriparatide) is used to treat osteoporosis (bone loss or weakening). It's for people who are at very high fracture risk or people who've already tried other osteoporosis medications. Forteo (teriparatide) is an injection that you give to yourself once a day. Some common side effects include general body pain and joint pain. This medication comes as a prefilled pen, but it doesn't come with pen needles. Forteo (teriparatide) is only available as a brand medication; there's no generic version yet.
Summary for Selective estrogen receptor modulator (SERM)
•Early-stage HR+ breast cancer after surgery to lower the risk of breast cancer coming back
•Ductal carcinoma in situ (DCIS) in females after breast surgery and radiation to lower the risk of breast cancer coming back
•Lowering the risk of breast cancer in females who are considered high risk
Pros and Cons of Forteo vs. Nolvadex
Pros and Const for Parathyroid hormone analog
Pros
•Can use if you're unable to take or still getting fractures with other osteoporosis medications
•A first-choice option for people at very high fracture risk (have had a fracture caused by osteoporosis before or have many risk factors for fracture)
•Lowers the risk for back fractures and fractures in other parts of the body (not including the hip) in postmenopausal women with osteoporosis