Osteoporosis Flashcards
Recommended calcium dose
1000-1500mg elemental calcium daily
(Take in two divided doses)
Why should a single dose of elemental calcium not exceed 500-600mg?
To reduce the risk:
Kidney stone
CVD
Stroke
Types of calcium formulation
Carbonate
Citrate
Os-Cal
Tums
Caltrate
Maalox
Oysco
Calcium Carbonate
40% elemental calcium
Requires acid for absorption
Take with food
Calcium Carbonate
Calcitrate
Citracal
Calcium Citrate
21% elemental calcium
Good with elderly and PPI (increased gastric absorption at high pH)
+/- food
Calcium citrate
ADR calcium supplements
Constipation
Hypercalcemia
Vit. D recommended daily dose
20-25 mcg/day (800-1000 IU)
Osteoporosis dose
Vit D deficiency treatment dose
125 - 175 mcg (5000-7000 IU) daily or 1250mcg (50000 IU) weekly for 8-12 weeks
Then maintenance dose:
25-50 mcg (1000-2000 IU) daily
Vit. D level for deficiency
< 30 ng/ml
Cholecalciferol
D3
Ergocalciferol
D2
Medications for Osteoporosis prophylaxis
Bisphosphonate
Estrogen based therapy (Raloxifene, Duavee)
Medications for osteoporosis treatment
Bisphosphonate
Denosumab
Parathyroid hormone analogs
Calcitonin
Levels must be adequate prior to treatment initiation
Vit. D
Calcium
Criteria for initiating treatment if osteoporosis
T score <= -2.5 in the spine, fermoral neck, total hip or 1/3 radius
Or
Any osteoporosis related fracture regardless of BMD
Criteria for initiating treatment if osteopenia
T score of -2.5 — -1 and 10 yrs risk of 20% or greater osteoporosis major fracture or 3% or greater hip fracture
Inhibits osteoclast and bone resorption
Bisphosphonate
Vertebral and hip fx risk reduction
All Bisphosphonate except ibandronate (verterbal only)
Bisphosphonate drug holiday timeframe
After 3-5 years of treatment
Other Bisphosphonate indications
Paget disease
Glucocorticoid induced osteoporosis
Hypercalcemia o f malignancy
Fosamax
Binosto
Alendronate
Alendronate dose:
Prophylaxis postmenopausal women
Glucocorticoid induced osteoporosis
5 mg daily
Alendronate dose:
Treatment (male and female)
10mg daily or 70mg weekly
Actonel
Atelvia (DR)
Risedronate
Risedronate dose:
Prophylaxis
5 mg daily or 35mg weekly or 150mg monthly
Risedronate dose:
Treatment (male and female)
35mg weekly
Risedronate dose:
GIO
5 mg daily
Boniva
Ibandronate
Ibandronate prophylaxis formulation
PO option only
Ibandronate treatment formulation
IV and PO
Ibandronate IV dose (male and female)
3mg IV every 3 months
Reclast
Zometa
Zoledronic acid
Zoledronic acid dose:
Treatment and GIO
5mg IV yearly
Zoledronic acid prophylaxis
5mg IV every 2 years
Bisphosphonate contraindications
Hypocalcemia
Inability to stand upright for 30 mins or more
Bisphosphonate warnings
ONJ
Esophagitis
Atypical femur fracture
Hypocalcemia
GI2
Bisphosphonate renal contraindications
< 30 ml/min: risedronate and ibandronate
< 35 ml/min: alendronate and zoledronic acid
Bisphosphonate and polyvalent ions
Separate by 2 hours
Bisphosphonate and food and beverage except water
Seperate by 30 mins
Bisphosphonate requires acid for absorption
Avoid PPI and H2RA
Atelvia DR (Risedronate)
Caution in aspirin induced asthma patient (bronchoconstriction)
Teratogenic
Zoledronic acid
Preferred formulation for esophagitis to reduce risk of esophageal cancer
IV Bisphosphonate
Estrogen based products
Raloxifene
Duavee
Evista
Raloxifene
Duavee
Conjugated estrogen + Bazedoxifene
Increased risk of VTE
Avoid if Hx/current VTE or pregnant
Raloxifene
Seperate from levothyroxine
Raloxifene
Hot flash
Peripheral edema
Arthralgia
Leg cramp
Raloxifene
Risk of endometrial, breast and ovarian cancer and VTE
Avoid if: breast cancer, pregnancy, uterine bleeding, hx/active VTE
Duavee
Indicated if > 5 yrs post-menopausal
Calcitonin
Nasal spray (200 units) or injection (100 units)
Calcitonin
Hypocalcemia
Risk of malignancy
Hypersensitivity to salmon products
Calcitonin
Injections and unopened nasal spray refridgerated
Calcitonin
Parathyroid hormone agonists (increases osteoblast)
Injection only
Teriparatide
Abaloparatide
Forteo
Teriparatide
Tymlos
Abaloparatide
High risk fx
Use 2yrs or less
Parathyroid agonists
Increased risk of osteosarcoma
Parathyroid agonists
Hypercalcemia
Arthralgia
Leg cramp
Nausea
Orthostasis/Dizziness
Parathyroid
Parathyroid injection storage
Keep refrigerated
Parathyroid hormone requires light protection
Teriparatide (Forteo)
SC prefilled pens
Parathyroid agonists
Monoclonal antibody blocks RANKL and RANK interactions preventing osteoclast formation
Denosumab
Prolia
Xgeva
Denosumab
Denosumab dose
60mg SC q6 months
Denosumab CI
Hypocalcemia
Denosumab warnings
ONJ
Atypical femur fracture
Hypocalcemia
Denosumab ADR
Hypertension
Fatigue
Edema
Dyspnea
Headache
GI2
Hypophosphotemia
Inhibits sclerostin (protein which inhibits bone formation)
Romosozumab
Evenity
Romosozumab
Duration limited to 12 months
Romosozumab
Treatment option if high risk of fracture
Parathyroid analogs
Denosumab
Romosozumab
Increased risk of MI, stroke and death
Romosozumab