Rheumatology Flashcards
gout is characterized by a serum uric acid
> 6.8 mg/dL
which disease states can increase risk of gout (7)
T2DM, hyperlipidemia, obesity, renal insufficiency, HTN, organ transplant, CHF
which foods increase risk of gout (5)
meat, seafood, beer, soft drinks, fructose
which foods decrease gout risk (3)
coffee, dairy, vit C
which medications increase gout risk (4)
thiazides, loops, nicotinic acid, aspirin
which medications lower gout risk (2)
losartan, fenofibrate
which 4 things can precipitate a gout flare
alcohol or high purine ingestion, stress, meds
3 drugs used for acute gout management
NSAIDs, colchicine, steroids
colchicine need dose adjustment for
renal & hepatic
AEs of colchicine
GI, hematologic, rhabdo
strong CYP3A4 inhibitors that interact with colchicine?
how to adjust dose?
clarithromycin, itraconazole, ketoconazole, darunavir/ritonavir
1/2 the doses
moderate 3A4 inhibitors that interact with colchicine?
how to adjust dose?
diltiazem, erythromycin, fluconazole, verapamil
single 1.2 dose for flares, prophy dose is 1/2 QD or QoD
p-gp inhibitors that interact with colchicine
how to adjust dose?
cyclosporine, amiodarone, ranolazine
single 0.6 for flare, prophy dose 1/2 QD or QoD
intraarticular steroid dose for large, medium, small joint?
lg- 40 mg
med- 30 mg
sm- 10 mg
2 xanthine oxidase inhibitors used chronically for gout
allopurinol, febuxostat
starting dose for allopurinol and how increase dose
start 50-100 mg QD and inc Q3-5W until achieve goal SUA
AEs of allopurinol
rash, DRESS
which medications can increase the risk of rash when taking allopurinol
amoxicillin, ampicillin, thiazides, ACEi
what should you do if you get a rash from taking allopurinol
d/c the drug
aside from drugs causing rash, which medications have a DDI with allopurinol
warfarin, 6-MP, azathioprine, theophylline
dose of febuxostat
40 mg to start and can increase to 80 mg QD if not at goal after 2 weeks
AEs of febuxostat
HA, arthralgias, abdominal pain, nausea, abnormal LFTs, flushing, dizziness
BBW febuxostat
CV death
DDI with febuxostat
concurrent 6-MP, azathioprine, theophylline
uricosuric that inhibits reabsorption of uric acid used for chronic gout
probenecid
dose of probenecid
250 mg bid x1week then can inc to 500 mg bid
max 2g/day increased in 500 mg increments Q4W
when should probenecid be avoided
Crcl <50, hx of nephrolithiasis
DDI with probenecid where it should be avoided
penicillin, methotrexate, carbapenems, salicylates
uricase agent used for chronic gout refractory to other treatments
pegloticase
dose of pegloticase
IV 8 mg Q2W over 2 hours
BBW for pegloticase
infusion reactions
what is recommended 1st line for UA lowering in chronic gout therapy
allopurinol
goal serum urate level for gout treatment
<6 mg/dl
what is next step after allopurinol for chronic gout
switch to febuxostat, inc dose, add probenecid
what is used when all options fail for chronic gout therapy
pegloticase
monitoring for chronic UA lowering therapy for gout
reassess levels Q2-5W, increase intensity until goal is reached
when should prophylaxis be used for chronic gout therapy and for how long
when ULT is initiated and continue for 3-6 months
1st line for prophylaxis for chronic gout therapy
colchicine 0.6 mg QD or BID
or
low dose NSAIDs - naproxen 250 mg BID
when should gout prophylaxis therapy be continued
activity of symptoms, flare in last 3 mos, tophi present
gout flare therapy for mild-mod pain with 1-2 joints involved
monotherapy
gout flare therapy for severe pain with >2 joints involved
combo therapy
3 options for gout flare therapy
colchicine 1.2 mg then 0.6 mg one hour later then start prophy dosing 12 hours later
full dose NSAID
steroids
when should colchicine not be used for gout flare therapy
on it prophylactically and had an acute regimen in the last 14 days
intraarticular steroids can be considered for gout flare therapy if
1-2 large joints involved
3 main steroid options for gout flare and dose
PO prednisone 0.5 mg/kg/day for 5-10 days
PO medrol
IM triamcinolone acetonide 60 mg then PO pred
combo therapy options for gout flare (4)
nsaid + colchicine
po steroid + colchicine
IA steroid + nsaid +/- colchicine
IA steroid + po steroid +/- colchicine
risk factors for osteoarthritis
obesity, genetics, trauma/injury, anatomic factors, female, non-caucasian, age >40F or >50M
main patho mechanism of OA
cartilage breakdown causes change to bone and joint tissue
affected joints for OA
hand, knee, hip
features of OA presentation
pain/stiff (AM, idleness), decreased range of motion, mono/oligoarticular, asymmetrical
1st line option for hand, knee, and hip OA
oral NSAIDs
what can be used for knee OA only
topical NSAIDs
what can be considered for knee and hip OA
IA steroids
APAP is used conditionally for OA and should be taken
650-100 mg PO Q4-6H
AROUND THE CLOCK NOT PRN
3 main complications from PO nsaid use
gastropathy, CV events, nephrotoxicity
how to approach PO NSAIDs in OA if they have bleed history?
>1 yr ago?
<1 yr ago?
> 1 yr— COX2 selective or non w/ PPI
<1 yr— COX2 selective w/ PPI