Osteoporosis Flashcards
What are some risk factors for Osteoporosis?
-Advanced age
-low bone mineral density
-females
-postemenopause
-small body frame/low bod weight
-falling and immobilization
-hx of parental hip fracture
-previous vertebral/fragility -fracture
-racial background
-sedentary lifestyle
-current smoking
-alcohol > 3 drinks/day
-low calcium intake
-vitamin D deficiency
-long term meds
What are the most common long term meds associated with OP? (6)
Chronic glucocorticoid use (>= 5 mg pred or equivalent for >= 3 months)
-Gonadotropin releasing hormone agonists
-cancer chemo drugs
-aromatase inhibs (anastrazole, exemestane, letrozole)
-Anticonvuls therapy > 2 yrs and age > 40
-Anticoags (> 6 months UFH/LMWH)
Associated Medical conditions: For the following conditions list a few topics
- Endocrine
- GI
- Disuse/immobility
- Chronic liver disease
- Inflamm Disorders
- Chronic Illness
- Genetic
- ovarian failure, testosterone deficiency, HYPERthyroidism, cushing’s syndrome, primary hyperparathyroid, diabetes
- Anorexia, crohn’s, celiac, chronic pancreatitis, bariatric surgery
- muscular dystrophy, MS, CVA
- RA, SLE, COPD
- CKD, malignancies, HIV/AIDS, organ transplant
- Osteogenesis imperfecta, turner syndrome, down syndrome, CF
Diagnosis requires :
History of :
Physical Exam Showing :
Labs such as :
Risk factors, secondary causes, current fractures
-loss of height
- serum ca2+, creatinine, phos, Mg2+, BUN
-CBC, LFTS, TSH, 25-OHD level, alk phos, albumin
-24 hr urinary CA2+ and creatinine
-Free testosterone (men)
Diagnosis - Dual Energy X ray Absorptiometry
- Describe the central DEXA and what it can predict
- What about the peripheral DEXA?
- Best predictor of hip fracture risk –> gold standard and definitive diagnosis . Can be used for spine and hip
- Wrist, ankle/heel and phalanges
-For screening only!
Diagnosing Osteoporosis Based on DEXA : Category Vs T Score
For each T score describe what the category is
- > -1
- -1 to -2.4 (osteopenia) + incr fracture risk determined by FRAX which is the 10 yr probability of major osteoporosis related fracture >=20% or hip fracture >=3%
- <= -2.5
- <= -2.5 with 1 or more fractures
- Normal
- Osteoporosis
- Osteoporosis
- Severe/established osteoporosis
Non Pharm tx :
-Start by achieving ___
-Life style interventions such as ? (4)
-Weight bearing __, balance exercise and ___ –> HOw long should patients be doing this for?
Peak bone mass (child-adolescent)
Sunlight exposure, smoking cessation, alcohol moderation , balanced diet!
aerobic exercise, resistance training
->= 30 mins/day for adults and >= 60 mins per day for children
Pharm tx Calcium and Vitamin D:
-What’s the recc dietary allowances for calcium for male and females 51-71+?
-Obtain as much calcium from ___ rather than via ___
-Calcium absorption is inhib when contained in foods with ___ or __ such as ??
-May be difficult to get RDA from diet if ?
1200 mg for females + males 71+, if 51-70 males = 1000mg and females = 1200 mg.
diet, supplement
oxalic, phytic acids –> spinach, rhubarb, sweet potatoes, beans, collard greens, whole grain, wheat bran
vegetarian or vegan
Calc Carb :
Generic names?
-Why is this the generally preferred salt?
-Take with ?
-Also acts as an ?
Caltrate, Tums, OsCal
-40% elemental calcium (highest of all Ca2+ salts) AND it’s the least expensive
-meals and or citrus juices (food incr acid production and acidiity is required for absorption)
Antacid (if taken on empty stomach u may have rebound gastric acidity and gastritis)
Calcium Supps :
-increases ___ but fracture prevention ONLY IF?
-Doses > 500-600 mg should be divided into?
-best to use which forms?
-Reccomend which form for older adults?
-AE’s?
-Dont exceed how many mgs per day due to risk of kidney stones and CVD/CVA?
BMD, with Vitamin D
2-3 doses/day
chewable, liquid
citrate (better absorption)
Flatulence and constipation (incr water, fiber, exercise)
> 1200-1500 mg/day
Calc Citrate :
Generic? Includes?
What % of elemental calcium?
Absorption is not affected by?
Very ___
Less ___ than carbonate
Citracal (D3)
21%
Food or acidity
soluble
constipating
Because calcium adsorbs/chelates drugs in the gut, which drugs do you have to space them apart from? (4)
How long should u space them apart?
Tetracyclines, azithro, fluoroquinolones, BIPHOSPHONATES
2 hrs
Calcium Increases intragastric pH , so u should space it apart 2 hrs from the following drugs ?
Itraconazole, ketoconazole, iron absorption
Why should patients not take PPI’s while taking calcium supps?
If you must take PPI’s while taking calcium supps, which supps should u use ??
CAlC supps may cause hypercalcemia with which drugs?
What can decr calc absorption?
PPI’s will increase hip fracture in patients > 50 years old when used greater than 1 yr. It may reduce Ca2+ absorption or inhibit activity in bone
NON CARBONATE SALTS
Thiazide diuretics
Fiber laxatives
Vitamin D :
-maximizes ___ and incr __
-Linked to ___
-Who are some individuals at risk for deficiency ?
intestinal calcium absorption , BMD
-Decr fractures
-Older adults > 70 yo
-concomitant low dose steroids
-concomitant phenytoin, CBZ, barbiturates, rifampin
-Low dietary intake
-Low UV light exposure, winter seasons
-Institutionalized or housebound
-GI malabsorption syndromes
-renal disease
-cirrhosis
Vitamin D from UV exposure :
- Recommended to get how much sunlight a day? Why do older folks have a harder time getting their adequate Vitamin D intake?
Sunlight 5-15 mins/day
-When you’re older your skin doesnt convert Vitamin D as effectively
VITAMIN D RDA:
For males and females 51-70 yrs?
>70 yrs?
- 600 IU (15 mcg)
- 800 IU (20 mcg)
Vitamin D Forms :
Ergocalciferol is ?
Cholecalciferol is?
What’s the daily dosage for supplementation?
Why is D3 usually preferred?
In which situations may u need a higher dose ?
Vit D2 (rx only , high dose for replacement tx)
Vit D3 (non rx supplementation)
-D3 1000-2000 IU (25-50 mcg)
D2 metab to active drug is impaired in older adults and cant be assayed in body. D3 more effective at raising Serum 25 (OH)D levels!
Obesity, malabsorption, older age
Vit D Replacement/Tx
What is the reference range for LOW levels VS DEFICIENCY?
What should the dose be?
Whats ur goal serum 25(OH)D concentrtaion? When should u re-check?
Low = 20-30 ng/mL
Deficiency = <20 ng/mL
50,000 IU PO qweekly x 8-12 wks , then once monthly or 1000-2000 IU PO daily thereafter
> = 30 ng/mL or 30-50 ng/mL is preferable!
after 3 months of therapy
Vitamin D ADR’s ? (2)
DDI?s ?
-Which incr metabolism? (4)
-Which decr absorption? (4)
Hypercalcemia, hypercalciuria
Phenytoin, barbiturates, CBZ, rifampins incr metabolism
Cholestyramine, colestipol, orlistat and mineral oil DECR absorption
For All women and Men with OP :
What’s the daily Calcium and Vitamin D3 dose?
COntinue both for how long?
Calcium : 1000-1200 mg daily
Vitamin D3 : 600-800 IU Daily
Indefinitely ! even if starting the rx only agent
Pharm Tx Should be considered for ?
-What kind of fracture?
-Which T score? (2)
Postmenopausal women and men older than 50 yrs who have a low trauma hip or vertebral fracture
T score <= 2.5 at the femoral neck, total hip, or spine (osteoporosis)
T score between -1 and -2.5 (osteopenia) and a FRAX10-yr probability of major osteoporosis related fracture >= 20% or hip fracture >=3%
TX recommendations :
- Pt’s with OP?
1st line?
2nd line? - Post menopausal pt’s with OP at v high risk of fracture
- Post menopausal pt’s with OSTEOpenia
- biphosphonates, denosumab (If CI to bisphos or ADR’s)
- Sclerostin inhibitor (romosozumab) or recomb PTH (teriparatide) followed by a biphosphonate
- individualized approach to reduce risk fractures
Kim, See Biphosphonates Chart
See chart