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.
