Osteoporosis, Gout, RA Flashcards
3 causes for gout
- increased uric acid production
- decreased uric acid excretion
- increased intake of purine-containing foods
acute gout attacks are classified as how many a year? and what type of meds should they be on?
< 3 attacks/year
should be on ANTI INFLAMMATORY AGENTS
what is our 1st line tx for acute gout attack?
NSAIDs
name some of the main adverse effects of NSAID use
- GI ulceration/bleeding
- impair renal function
- CV events
what is 2nd line tx for acute gout attack? + what’s the prototype?
glucocorticoids : PREDNISONE
when treating acute gout attack (NSAIDs + glucocorticoids) when would we want to see results (decreased pain + inflammation)?
within 24 hours ◡̈
what’s our 3rd choice tx for acute gout attack?
ColChiCine
= aCute
what is our anti-inflammatory prototype for acute gout attack? (3rd choice, if NSAIDs and steroids are out)
colchicine
what is the unique thing about colchicine?
anti-inflammatory effects ONLY with gout
what is the MOA of colchicine?
inhibits leukocyte infiltration –> prevents destructive lysosomal enzymes
what is the MAIN adverse effect of colchicine and what should we do if this occurs?
GI effects –> discontinue drug!!!
describe the dosing for colchicine (initial + max)
1.2mg loading dose –> 0.6mg 1 hour later
MAX: 1.8mg/day
what are the 4 serious/rare AE of colchicine?
- bone marrow suppression
- rhabdomyolysis
- severe kidney disease
- severe liver disease
drug-food interaction with colchicine?
grapefruit juice
if someone has > 3 gout attacks/year, what medication plan should they be on?
PREVENTION of gout (allopurinol)
what is our prototype for drugs that inhibit uric acid formation?
allopurinol
in addition to reducing uric acid levels, allopurinol has 2 more actions r/t gout
- decrease tophi that’s already formed
2. decrease risk of urate crystals in kidneys
what is allopurinol known to do at the START of therapy?
can increase acute gout attacks
SE of allopurinol
GI (mild)
rare/serious AE of allopurinol
hypersensitivity syndrome
“ALL PUR drugs are sensitive”
drug-drug interaction with allopurinol
warfarin
“ALL PUR drugs are SENSITIVE (AE) and don’t like WAR[farin]”
what patient education should we include with allopurinol therapy?
H2O H2O H2O!!!
increase fluid intake to flush out kidneys
what is our “least invasive”/starting point for therapy for osteoporosis + also what all other drug therapies should be paired with?
vitamin supplementation: vit D + calcium
for osteoporosis therapy, what are the 5 classes of drugs that decrease bone resorption (osteoClast)?
- calcitonin-salmon
- biphosphonates*
- estrogen replacement
- SERMs
- Denosumab
for osteoporosis therapy, what is the prototype for drugs that increase bone formation (osteoBlast)?
teriparatide
“teri has this bone para ti (for you)”
“teri is super generous and wants to help you increase your bone formation”
vitamin supplementation for osteoporosis prevention + tx is based on what?
age + intake
how much calcium/day? (woman 51-70yrs)
1200mg
what’s the unique thing about calcium dosing?
body can only absorb 600mg at a time, so dosing should be divided
*calcium carbonate has HIGHEST % of Ca ◡̈ *
what food interactions should you know about with calcium? how can we work around this?
oxalic acid
spinach, beets, rhubarb, swiss chard, brain, whole grains
separate intake of Ca + these foods by 1 hour
how much vitamin D should be supplemented daily?
800-1000mg/day
what is the MOA of calcitonin-salmon?
prevents bone resorption (osteoClast activity) : keeps calcium in the bone + prevents pulling into bloodstream
“the salmon prevents you from being pulled into the stream”
routes for calcitonin-salmon?
intranasal
SQ
SE of calcitonin-salmon
nasal drying, nausea, increased malignancies (canada)
3rd choice drug
“snorting salmon through your nose causes you to be nauseated with a dry nose and get malignancies if you go to canada”
what’s our gold star and 1st choice drug for TREATMENT of osteoporosis? + what is prototype?
biphosphonates : alendronate
MOA of biphosphonates
prevents bone resorption + undergoes incorporation into bone (so effects of this drug can last a long time)
what is the ending of biphosphonates / how can we recognize them?
“____ronates”
patient education with PO alendronate (4 things)
- don’t take with ANY food - none will be absorbed
- take with FULL glass of H2O
- remain upright for 30 minutes - can cause severe esophagitis!
- don’t chew or suck on tablets
what is most common SE of alendronate?
esophagitis
stay upright 30 mins after PO admin
AE of alendronate (4)
- atypical femur fractures
- musculoskeletal pain
- ocular inflammation
- osteonecrosis of the jaw
“ALEN + NATE get weird fractures that give you MS pain, inflame your eyes and necrose your jaw”
what is the prototype for estrogen replacement for tx of osteoporosis?
premarin
what is MOA of premarin
suppresses osteoclast proliferation (decreases bone resorption)
“pregnant horse pee gives you strong bones”… gross
risks associated with premarin therapy (4)
- breast CA
- endometrial CA
- MI
- stroke
re: treatment of osteoporosis, what does SERM stand for?
selective estrogen-receptor modifiers
what is the prototype for SERMs?
raloxifene
what is the MOA of raloxifene?
decreases bone resorption (mimics estrogen effects on non-breast cells + / or blocks effects of estrogen on breast cells)
what 3 things does raloxifene improve?
- bone density
- lipid profiles
- CV risk
what are the 3 major risks associated with raloxifene therapy?
- DVT
- PE
- stroke
for tx of osteoporosis, what is the prototype for the monoclonal antibody?
denosumab
“den = density”
MOA of denosumab
prevents activation of RANK receptor
RANK receptors are on osteoClasts, so blocking this receptor decreases osteoclast activity
route + frequency of denosumab
SQ q 6 months ◡̈
what should also be taken with denosumab?
vitamin D + Calcium supps
SEs of denosumab (4)
- injection site rxns
- pain (back, MS, extremity)
- UTI
- hypercholesterolemia
what are the rare/serious AE of denosumab?
- serious infections
- derm rxns
- osteonecrosis of the jaw
what is our prototype drug for increasing bone formation?
teriparatide
MOA of teriparatide
increase bone deposits by osteoblasts
= increase bone formation
route for teriparatide
SQ
$1500/month!
“teri is rich, but we love her b/c shes super generous and gives us all the bone deposits!”
SEs of teriparatide (5)
- nausea
- HA
- back pain
- leg cramps
- initial ORTHOSTATIC HYPOTENSION
(but generally, well tolerated)
teri’s got some period symptoms
teriparatide therapy is associated with an increased risk of what?
osteosarcoma
“teri is so generous and gives gives gives, but sometimes this can be toxic”
what are the 3 classes of antirheumatic drugs?
- NSAIDS
- glucocorticoids
- DMARDs
which of the 3 classes for antirheumatic drugs reduces joint destruction?
DMARDS (disease modifying drugs)
glucocorticoids slow progression of joint damage
which of the antirheumatic drugs should be started within 3 months of dx of RA?
DMARDs
which of the antirheumatic drugs are really only for symptomatic relief?
NSAIDs
DMARDs are broken up into 2 categories. what are they?
biologic + non-biologic
prototype for non-biologic DMARD agent
methotrexate
how long does methotrexate take to start working? what should be done until they kick in?
3-6 weeks to work
NSAID therapy until then
what supplement should be given with methotrexate? what is dosing?
folic acid 5mg/week
how is methotrexate working?
immunosuppressive
SE of methotrexate (7)
- hepatic fibrosis
- bone marrow suppression
- GI ulceration
- pneumonitis
- CV disease (reduced life expectancy)
- infections
- Cancers
what is the prototype for the biologic DMARD?
etanercept
MOA of etanercept
immunosuppressive: targets specific parts of the inflammatory process (mostly tumor necrosis factor)
ALL biologic DMARDs put patient at high risk of what?
INFECTIONS (b/c it’s an immunosuppressive)
what should patients be tested for before beginning etanercept therapy?
TB
if positive TB test, patient should be treated first!!!
route + frequency for etanercept
SQ twice a week
special considerations for etanercept therapy (4)
- test for TB + treat if needed
- watch for Hep B reactivation
- no active infections
- no live vaccines
etanercept therapy puts someone at risk for what 4 things?
- HF
- cancer
- CNS disorders
- serious skin rxns
brain, heart, cancer, skin