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84 Cards in this Set
- Front
- Back
measures BMD
used in dx of osteoporosis |
DEXA scan
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minimize bone loss
delay progression of osteoporosis prevent fracture-related M/M tx for life (may not be necessary anymore) |
goals of Drug tx in osteoporosis
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what is now more important than calcium intake?
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vit D
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how should calcium supplements be given?
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divided doses - one large dose will NOT be absorbed)
NATURALLY is the best way to get all vitamins/minerals except Folic Acid - supplements are preferred |
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calcium requirements for adolescents
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1200-1500/day
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calcium requirements for premenopausal women (25-50)
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1000/day
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calcium requirements for postmenopausal women
not receiving HRT/ERT receiving HRT/ERT |
1200
1000 |
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calcium requirements for men
<70 >70 |
1000/day
1200/day |
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commonly used calcium salts
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calcium carbonate - TUMS, Caltrate, Oscal (40% elemental calcium)
calcium citrate - Citracal (21%) |
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calcium carbonate
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TUMS
Caltrate Oscal Require acid for absorption not taken in elderly or pts on PPI |
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does not require acid for absortion
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calcium citrate (citracal)
need higher dose because less elemental calcium |
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does calcium increase risk of MI?
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some evidence that it might, especially in people who do not take Vit D along with it
multivitamin may increase MI/death |
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vit D deficiencies are more common than previously realized because
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decreased ability to absorb it as we age
increased use of sunscreens more time indoors |
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best measure of Vit D
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25-hydroxyvitamin D
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to prevent Vit D deficiency
<70 y/o >70 y/o general recommendation also weight bearing exercise and walking |
600 IU/day
800IU/day 800-2000 |
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to TREAT vit D deficiency
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50,000 IU once WEEKLY x 6-8 weeks
re-check levels in 8 weeks |
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2 categories of drug therapy in osteoporosis
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1. antiresorptives (biphosphonates, calcitonin, estrogen, estrogen agonists/antagonists=SERMs)
2. anabolic drugs (teriparatide/forteo) |
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antiresorptives MOA
biphosphonates calcitonin estrogen estrogen agonsits/antagonists = SERMs |
slow progression of bone loss
pts stop losing bone as quickly as they did before treatment and still make bone at a normal pace |
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anabolic drugs MOA
teriparatide/forteo |
INCREASES the rate of bone formation
only class of drugs able to do this |
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HRT place in therapy
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used to be 1st line for prevention of osteoporosis in post-menopausal
now LAST choice due to CV risks |
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Selective Estrogen Receptor Modulators (SERMs)
aka estrogen agonists/antagonists |
prevention AND treatment of osteoporosis in POSTmenopausal women
increases bone density reduces risk of SPINE fx |
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these drugs only reduce risk of SPINE fx
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SERMs (Raloxifene/Evista)
estrogen agonist in bone and lipid antagonist in breast and uterus *used more in prevention of breast cancer |
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can you use Raloxifene/Evista with Biphosphonates?
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yes
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Evista/Raloxifene side effects
SERM |
hot flashes
leg cramps DVT (black box warning) ^menopause sx |
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contraindications to SERMs/any drug messing with estrogen?
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active thromboembolic dz
pregnancy |
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these drugs reduce the risk of breast cancer by 65% over 8 years
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SERMs
Raloxifene/Evista |
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major therapeutic class for osteoporosis
and how long should they be given |
biphosophonates x 5 years
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prevention AND treatment of osteoporosis in pre and post-menopausal women, men, and steroid-induced osteoporosis
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Biphosphonates (usually with Vit D)
Alendronate (Fosamax) Ibandronate (Boniva) Risedronate (Actonel) Risedronate (Atelvia) |
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these drugs decrease both spine AND hip fx
usually include vit D dosing |
Bisphonphonates (Fosamax)
tx dose is 2x prevention dose (although tx dose is usually given) |
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how often are biphosphonates given
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weekly for 5 years
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risedronate (Atelvia)
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release in the small intestine
can be taken AFTER breakfast instead of 30 minutes before tx only - no prevention |
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Parenteral biphosphonates
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ibandronate (Boniva)
Zoledronic Acid (Reclast) |
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side effects of biphosphonates
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GI upset with PO drugs (so use Reclast)
musculoskeletal pain osteonecrosis of the jaw (ONJ) |
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ONJ (osteonecrosis of the jaw)
death of bone cells |
95% are cancer patients receiving biphosphonates
inhibiting bone turnover needed for healing chlorhexidine gluconate rinse (Peridex) preferred before any dental surgery - to prevent ONJ |
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when is Peridex (chlorhexidine gluconate rinse) used?
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prevent ONJ in pts getting dental surgery
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contraindications for biphosphonates
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hypocalcemia
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considerations for biphosphonates (alendronate/Fosamax)
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must be taken FIRST thing in the morning with at least 8ox WATER
must sit/stand for 30 MINS (boniva=60) do NOT eat/drink anything or take meds for 30 mins should not be given in NPO state |
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can patients stop biphosphonates?
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yes - d/c drug if they haveb een on them for 5 years with good response and stable DEXA and low fracture risk
get DEXA q 2 years |
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calcitonin use in therapy
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least effective in osteoporosis
but used in women 5 years beyond menopause to tx used in patients with BONE PAIN |
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contraindications to calcitonin
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hypersensitivity to salmon protein
should be given to osteoporosis pts experiencing BONE PAIN |
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miscellaneous osteoporosis drugs
Denosumab (Prolia) |
used if pts failed/intolerant to other osteoporosis tx (like biphosphonates)
inhibits RANKLigand given q 6 months (2x/year) |
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ADRs of Denosumab (Prolia)
subq osteoporosis drug q 6 mos inhibits RANKL |
used after Reclast
skin reactions (eczema, dermatitis) musculoskeletal pain ONJ |
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eczema and dermatitis are ADRs of what drug
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Denosumab (Prolia)
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anabolic (bone formation) drugs used in osteo
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teriparatide (Forteo)
parathyroid hormone |
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this drug is PTH and used for MAX od 2 years in osteo
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Teriparatide (Forteo)
rebuilds bone and increased bone mineral density |
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nictonie is in
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cigarettes, chewing tobacco
excites neurons = DA requirements of an addictive drug |
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nicotine withdrawal
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irritability
sleeplessness anxiety diff concentrating h/a change in appetite relapse |
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nicotine products
nicotine gum (nicorette) transdermal nicotine patch (nicoderm CQ) nicotone nasal spray (nicoTROL NS) nictoine inhaler (Nicotrol inhaler) |
reduce nicotine withdrawal sx
should NOT smoke while on these products |
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nicorette (nic gum)
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sugar-free gum
FIXED schedule NOT prn contraindicated: mouth/jaw problems or dentures/braces |
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Vareniciline (Chantix)
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can smoke for first week
contains NO nicotine targets nicotine receptors in brain, blocks nicotine from reaching them-->less dopamine is released compared to nicotine if pt relapses, varenciline decreases reward-like effects of nicotine |
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varenciline
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chantix
contains NO nicotine |
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ADRs of varenciline (chantix)
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nausea
psych changes |
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when should chantix be stopped?
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agitation
depressed mood changes in behavior suicidal |
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antidepressants (SSNI) that may have efficacy in smoking cessation
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Bupropion (Ziban)
brand name = Welbutrin |
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Bupropion/Ziban
Welbutrin |
antidepressant that may help with smoking cessation
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gout attach is always preceded by
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hyperuricemia
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therapeutic goal in gout
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lower UA below saturation point
< 6mg/dL prevent deposition of urate crystals |
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proteins-->purines-->hypoxanthine-->xanthine-->UA
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allopurinol plugs in to inhibit xanthine oxidase
colchicine blocks leukotrienes |
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NSAIDs (all except aspirin) used as
indomethacin |
1st line tx of ACUTE gout attacks
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Typical NSAID used in acute gout attacks
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Indomethacin
(or ibuprofen) |
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why is aspirin NOT used in acute gout attacks?
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causes hyperuricemia because competes with UA for excretion
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Colchicine should NOT be used
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in acute gout attacks
it has NO effect on metabolism or excretion of uric acid it DOES prevent recurrent gout episodes |
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does colchicine affect metabolism/excretion of UA
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NO! so not used in acute gout
also diarrhea is a bad ADR |
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when should you avoid colchicine?
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ELDERLY (use allopurinol)
acute attacks (used NSAIDs, not aspirin) |
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NSAIDs and Colchine are not used in
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Kidney impairment
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ADRs of colchicine
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DIARRHEA - good for monitoring toxicity (may be 1st sign)
IV is so toxic because you will not get diarrhea so no "initial" sx of toxicity MYOPATHY IV colchicine can lead to bone marrow suppression |
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IV colchicine ADR
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bone marrow suppression
not used because no diarrhea = no wy to monitor toxicity |
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uricosurics
probencid (Benemid) Sulfinpyrazone |
used in UNDERexcreters
should NOT be started until 2-3 weeks after an acute attack inhibits re-absorption of UA in renal tubules) |
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these drugs should not be started until 2-3 weeks after an acute gout attack
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uricosurics (Probencid) used in under-excreters
inhibit reabsorption of UA = more UA in the urine |
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beacause uricosurics increase UA in the urine (inhibit reabsorption of UA) they often cause
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kidney stones
maintain high urine volume (2L/day) |
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drug interactions with probencis (uricosuric)
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ASA = retention of UA
Penicillin |
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kidney stones are seen with what drugs
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uricosurics (Probencid)
do not give with ASA or PCN |
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allopurinol (Zyloprim)
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standard drug used in between acute gouty episodes to decrease total UA
used in over-producers |
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xanthine oxidase inhibitor
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allopurinol (zyloprim)
can be given once/day because allopurinol + alloxanthine give 24 hour control |
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how should allopurinol be doseed
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titrated up
give Colchicine or NSAID until uric acid <6 to prevent gout attack |
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allopurinol and febuxostat should be given after
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NSAID or colchicine reduce UA <6
titrate up |
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ADR of allopurinol
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Allergic rxn
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drug interactions of allopurinol
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azathioprine or mercaptopurine (chemo drugs) - must decrease dose by 75%
allopurinol inhibits metabolism of probencid and warfarin |
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if pt is on chemo drugs, must reduce allopurinol by
allopurinol decreases mtabolism of |
75%
warfarin and probencid |
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Febuxostat (Uloric)
new xanthine oxidase inhibitor |
chronic gout in overproducers OR underexcretors
used if they cannot tolerate allopurinol give NSAID or colchicine until UA <6 |
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corticosteroids in gout
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sometimes if attack is severe
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rasburicase (Elitek) used for gout
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in CA patients whose therapy results in tumor lysis and increase plasma uric acid
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this drug is used to reduce UA in cacner pts
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Rasburicase (Elitek)
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when should you consider prophylactic gout therapy?
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> 2 attacks in one year
severe primary attack complicated by kidney stones serum UA >10 urinary excretion of urate >1000 in 24 hours |