Chapter 21 exam Flashcards
what are bisphosphonates?
Nonhormonal agents
how do bisphosphonates work?
◦Act directly to inhibit bone reabsorption, increasing bone mineral density at the spine and hip, and decreasing incidence of first and future fracture
◦ Bind strongly to and accumulate in bone, creating a reservoir of drug that is released back into systemic circulation gradually over a period of months or years after treatment is stopped
ex of bisphosphonated…
◦alendronate (Fosamax) and ibandronate (Boniva)
ex of parathyroid hormone…
◦teriparatide (Forteo)
what is teriparatide?
an injectable form of parathyroid hormone approved for postmenopausal women and men with osteoporosis at a high risk for having a fracture
what do parathyroid hormones do?
◦Increases GI calcium absorption and renal tubular reabsorption of calcium, increasing bone mineral density, bone mass, and strength
what forms are Calcitonin-Salmon available in?
nasal spray (Miacalcin) or as a subcutaneous injection
what are functions of calcitonin-salmon ?
involved with calcium regulation, increases spinal bone density, and provides an analgesic effect in acute vertebral fractures
when is calcitonin-salmon used?
◦Reserved for women who refuse or cannot tolerate HRT or in whom HRT is contraindicated
Estrogens-HRT-
estrogen with or without progestin, is recommended for postmenopausal osteoporosis prevention only when unable to take other agents, and when benefits outweigh risks
what do Selective Estrogen Receptor Modifiers (SERMs)-do?
◦Increase bone mineral density, decrease bone reabsorption, and reduce fracture risk without promoting breast or endometrial cancer
ex of SERMs
◦raloxifene (Evista)
definition of SERMs
selective estrogen receptor modifier with estrogen agonist activity on bone and lipids and estrogen antagonist activity on breast and uterine tissue
what does estrogen before menopause do?
helps to maintain a normal bone reabsorption rate in women
Osteoporosis Therapy includes-
◦ Therapy includes calcium, vitamin D, and prescription medications
osteoporosis def
◦ A systemic skeletal disease
◦ Characterized by low bone mass and deterioration of bone tissue, leading to bone fragility and increased susceptibility to fracture, especially of the hip, spine, and wrist