Key takeaways
Estradiol (Climara) and alendronate (Fosamax) are both used to prevent osteoporosis, but they belong to different medication classes and have distinct uses and characteristics. Estradiol is an estrogen replacement therapy primarily used to relieve menopause symptoms and prevent bone loss after menopause. It is applied as a transdermal patch once a week. Alendronate, on the other hand, is a bisphosphonate that treats and prevents osteoporosis by slowing bone breakdown. It is taken orally, either daily or weekly. Both medications are available as a lower-cost generic. Estradiol can cause side effects like breast pain and headaches, while alendronate may lead to stomach pain and heartburn. You should stay upright for 30 minutes after taking alendronate to avoid esophageal irritation.
