Week 7: Gout, Osteoarthritis, Rheumatoid Arthritis, SLE Flashcards
Gout
most common form of inflammatory arthritis
“disease of kings
Gout epidemiology
increased age=increased risk
3-4:1 male: female
(female risk increases w. age w. estrogen loss
linked to:
comorbid conditions
diet
medication use
renal erate transporter gentotype (SLC2A9, ABCG2, SLC17A3, SLC22A12)
Patho of gout
purines (diet, tissue breakdown)-> uric acid (metabolized by uricase in most mammals, not humans)->metabolized to allantoin and excreted from body
UA soluble at conc <6.7 mg/dL
saturation causes crystallization into joints
phagocytosed triggering an immune respone
excess serum uric acis caused by
*overperoduction of urate
or underexcretion of urate
gout and disease states
DM
HLD
obseity
renal insufficiency/CKD
HTN
organ transplantation
CHF
FOOD AND GOUT
hyperuricemic
*meat
seafood
beer and liquor
soft drinks
fructose
Uricosuric (increase uric acid excretion in urine)
*coffee
dair
vitamin C
meds and gout
hyperuricemic meds
*THIAZIDES
LOOP DIURETICS
NICOTONIC ACID
ASPIRIN (<1G/DAY)
others..
cyclosporine
tacrolimus
pyrazinamide
levadopa
ethambutol
uricosuric meds
LOSARTAN
FENOFIBRATE
classic GOUT PRESENTATION
overall characteristic of flares:
common areas affected:
can be precipitated by:
presentation waxes and wanes . periods of asymptomatic until pt experiences acute gout attack
gout flare: (attack): onset within 24 of severe pain, erythema and swelling in a single or multiple joints
Podagro: first metacarsopholangeal joint (big toe) joint involvement most common
may calso effect ankles, fingers, wrists and elbows
can be precipitated by
alcohol ingestion
high purine ingestine
stress
meds (including UA lowering agents
other clinical presentations of gout
classic gout: monarticular arthritis, frquently attacks first metatarsalpholangeal join, although other joints of lower extremeitie are also frquently involved. affected joint i swollen, erythamatous, and tender
interval gout: asymptomatic period inbetween attacks
tophaceous gout: deposit of urate crystalls in soft tissues, . complications include soft tissue damage, deformity, joiint destruction, and nerve compression syndromes such as carpal tunnel syndrome
atypical gout: polyarthritis affecting any join upper or lower extremity. may be confused with rheumatoid or osteoarthritis
gout nephropathy: nephrolithiasis . acut and CKD
what is a tophi
mass of urate deposits in bone, cartilage, joints or tissues
gout dx
dx by synovial fluid aspiration and identification of monosodium urate crystals
* not routinely performed
!!Flare/ attack presentation along w. serum acid>6.8 mg/dL indicated treatment for gout!!
**note. elevated serum uric acid levels alone w. no presentation of gout symptoms does not warrant gout treatment
Goals of therapy for acute gout
reduce pain and duration of attacks
geenral anti-inflammatory agents for acute gout treatment
NSAIDS
colchcine
corticosteroids (oral or intrarticular)
General Acute Gout pharmacotherapy
NSAIDS
moa:
examples:
dosage:
General Acute Gout pharmacotherapy
moa:cox INHIBITION
examples: Indomethacin, naproxen, and sulindac have fda approved indications for gout (but any nsaid will do for the most part)
dosage: –
nsaid considerations for use in acute gout
timing:
when to avoid use:
timing of admin (<24 hrs) more important to treatment success than choice of agent
resolution of symptoms usually within 5-8 days
(may require treatment beyond 7 days)
AVOIDE USE IN:
*renal insufficiency/ failure
*bleeding disorder/anticoagulated pts
*peptic ulcer disease
*CHF
*older adult (>75)
General Acute Gout pharmacotherapy
Colchicine
moa:
examples:
dosage:
General Acute Gout pharmacotherapy
moa: inhibitoin og b-tubulin polymerization into microtubules, causing downregulation of inflammatory patways (also prevents activayion, degranulation and migration of neutrophils
examples:–
dosage:
1.2 mg (2 tabs) po x 1 then 0.6 mg 1 hr later
*may have to continue beyond this dosage w. colchicine or additional therapy
Considerations/pearls for colchicine
often causes GI symptoms
can cause:
*hematologic abnormalities
*rhabdomylisys
a) renal dysfunction and elderly patients are at increased risk
b)concaminant use of 3a4 inhibitors, pgp inhibitors, fibrates, and statin may increase risk of myopathy
Dose adjustment for..
*Crcl< 30mL/min
*severe hepatic impairment (no recommendations. if being used, reduce dose)
DDI: concaminant cyp3a4 and pgp inhibitor users
*dose adjustments necessary (for prophylactic users too)
do not dose colchicine for flare therapy if using prophylaxis
*concurrent use of colchicine and pgp or strong cyp3a4 inhibitors is CI in renal or hepatic impairment (fatal toxicities reported)
Colchicine DDI
DDI mechanism: Strong CYP3A4 inhibitors
examples:
dose adjustments:
*acute gout flare:
*ppx gout flare:
Colchicine DDI
DDI mechanism: Strong CYP3A4 inhibitors
examples: CLARITHROMYCIN, ITROCONAZOLE, KETOCONAZOLE, DARUNAVIR/RITONAVIR, atazanavir, nefazodone, lopinavir/ritonavir
dose adjustments:
*acute gout flare: single 0.6 mg dose followed by 0.3 mg 1 hr later dose to be repeated no earlier than 3 days
*ppx gout flare: 0.3 mg once qod to 0.3 mg once daily
Colchicine DDI
DDI mechanism: Moderate CYP3A4 inhibitors
examples:
dose adjustments:
*acute gout flare:
*ppx gout flare:
Colchicine DDI
DDI mechanism: Moderate CYP3A4 inhibitors
examples: VERAPAMIL, DILTIAZEM, ERYTHROMYCIN, FLUCONAZOLE, aprepitant, amprenavir
dose adjustments:
*acute gout flare: 1.2 mg dose; dose to be repeated no earlier than 3 days
*ppx gout flare: 0.3-0.6 mg daily (0.6 mg dose may be given as 0.3 mg twice daily)
Colchicine DDI
DDI mechanism: PGP inhibitors
examples:
dose adjustments:
*acute gout flare:
*ppx gout flare:
Colchicine DDI
DDI mechanism: PGP inhibitors
examples: CYCLOSPORINE, AMIODARONE, RANAZOLINE
dose adjustments:
*acute gout flare: single 0.6 mg dose; dose to be repeated no earlier than 3 days
*ppx gout flare: 0.3 mg once qod to 0.3 mg once daily
General Acute Gout pharmacotherapy
Coticosteroids
moa:
examples:
dosage:
General Acute Gout pharmacotherapy
Coticosteroids
moa: reduces polymorphnuclear leukocyte migration, supress the lymph system
*immune supression and anti-inflammatory effects
examples:prednisolone, prednisone, methylprednisolone, intra-articular triamcinolone
dosage:
*prednisolone 30-35 mg po x5days
*prednisone 30-60 mg po qd for 2 days with taper over 10 days
*intrarticualar triamcinolone:
a) large joint (knee):40 mg as a single dose
b)medium joint (eg wrist, ankle, elbow): 30 mg as a single dose
c) small joint (eg toe, finger): 10 mg as a single dose
corticosteroids considerations for acute gout flare
*if only one or two joints are involved, either IA or oral are recommended
if ana attack i polyarticular, systemic therapy is indicated
consider alternaive if dm, chf OR SEVERE gerd OR pud
Safe for use in renal impairment
AE (with short term use): leukocytosis, increases appetite, modd changes, elevated BG
Chronic therapy of gout goal
prevent future attacks and hyperuricemic sequelae by maintainging SUA <6.0
*prevent arthropathy, tophus frmation, nephrolithiasis, joint damage
General Chronic Gout pharmacotherapy classes and examples
Xanthine Oxidase Inhibitors
*Allopurnol
*Febuxistat
Uricosurics
*probenacid
Pegloticase
General Chronic Gout pharmacotherapy
Allopurinol
moa:
dosage:
AE:
DDI:
Considerations:
General Chronic Gout pharmacotherapy
moa: Xanthine oxidase inhibitor. blocks conversion of hypoxanthine to xanthine to uric acide
dosage:
starting: 50-100 mg qday
*100 mg po qd starting for normal renal function
*50 mg po qd in CKD stage 4 or worse
*increase q2-5 weeks to target <6 mg/dL
*may have to increase up to 800 mg to achieve target SUA
*can go above 300 mg po qday even in renal impairment depsite renal dosage adjustment PI recommendations
ae:
*rash:~2%. increased with coad w. amoxacillin, ampicillin, thiazides, ace-i. Prob best to d/c drug. mild rash can progress to SJS
*DRESS
*occurs in 0.1 pts
IMMEDIATELY d/c
DDI:
*warfarin (increases risk of bleeding)
*6-MP, azathioprine, theophylline (allopurinol can icnrease levels of these
*amaxaillin, ampicillin, thiazides, ace-i increase risk of rash
considerations:
*1st line therapy
*can be used overproducers or underexcreters of uric acid
General Chronic Gout pharmacotherapy
Febuxistat (Urolic)
moa:
dosage:
AE:
CI:
DDI:
Considerations:
General Chronic Gout pharmacotherapy
moa: chemically engineered selective xanthine oxidase inhibitor
dosage:
starting: 40 mg once daily;
may increase to 80 mg qd in pts who do not achieve serum uric acid level <6 mg/dL after 2 weeks
AE: headahce, arthtalgias, abd. pain, NV, abnormal lft, FLUSHING AND DIZZINESS
CI: 6-MP, azathiopurine, theophylline
DDI: 6-MP, azathiopurine, theophylline (febuxistat inc levels of these)
Considerations:
BBW: inc. cv death in pts with cv disease
*theoretically can be used in ppl with allopurinol hypersensitivity, not sturcturally related.
*no dose adjustments required for mild-mod renal or hepatic impairment. use caution in severe hepatic impairment or crcl<30
*concam nsaid or colchicine ppx may take up to 6 mo. to help prevent gout flares per package insert
*if gout flare occurs, febuxistat doesnt need ot be d/c
General Chronic Gout pharmacotherapy
Probenacid
moa:
dosage:
AE:–
CI:
DDI:
Considerations:–
General Chronic Gout pharmacotherapy
Probenacid
moa: inhibits reabsoprtion of uric acid at proximal conviluted tubule, increasing excretion
dosage:
250 mg bid for 1 wek, may incr to 500 mg bid if needed, may increase to a mac od 2g/day (increase in 500 mf increments q4w)
AE:–
CI:
*Crcl<50 mL/min,
*hx of nephrolithiasis
* use of pcn, methotrexate, carbapenems (doripenem, meropenem) (inc conc due to decreased renal secretion
*salicylates, decreased efficacy of probenecid
DDI:use of pcn, methotrexate, carbapenems (doripenem, meropenem) (inc conc due to decreased renal secretion
*salicylates, decreased efficacy of probenecid
Considerations:–
General Chronic Gout pharmacotherapy
Pegloticase
moa:
dosage:
AE:
CI:–
DDI:–
Considerations:
General Chronic Gout pharmacotherapy
Pegloticase
moa: pegilated recombinant uricae: converts uric acid to allantolin so it can be excreeted
dosage:
*IV: 8mg q2w over atleast 2 hrs
AE:infusion rections, anaphylaxis
CI:–
DDI:–
Considerations:
BBW: can cause anaphylaxis and infusion reactions
*occurs within 2 hrs
*premed w. antihistamines or corticosteroids
*ppx w. low dose colchicine or nsaid x 6 mo
Mgt of acute gout attack
General principles
acute gouty arthritis attaks should be treates w. pharm therapy
pharm treatment should be initiated ithin 24hrs of acute gout attack onset
ongoing pharm urate lowering therapy (ULT) should not be interrupted during an acute gout attack
guidelines for acute gout attack
- assess severity
A) if pt has mild(0-4)-mod(5-6) pain, and an attack effecting 1 or few small joints, or 1-2 Large joints->can consider monotherapy
B) if pt has severe (7+) pain, and polyarticular attack or an attack affecting multiple large joints-> can consider initial combo therapy (will discuss in another card)
2) Selecting Monotherapy
a)NSAID
b)Systemic corticosteroid
c) colchicine
***supplementation w. topical Ice for any gout attack
3) Assess treatment outcome
A) if inadequate response->
*consider switching to alternate monotherapy
*consider combo therapy
B) if successful outcome
*pt education: including diet and lifestyle, role of uric acid excess in gout and as key treatment target; prompt self trt of subsequent acute gout attacks
*consider indications for ULT or adjustment of ongoing ult
Guideline acute flare dosing for colchicine therapy
If pt has not been on ppx colchicine or not treated w. colchicine for an acute attack in the last 14 days..
can use oral colchicine:
*1.2 mg, then 0.6 mg 1 hr later
* then gout attack ppx can be started(0.6 mg po qd or bid), beginning 12 hrs or later, and continued until the acute gout resolves
if pt is on ppx colchicine or has recieved colchicine for an acute attack w.in the past 14 days..
*choose alternative therapy (NSAID or coricosteroid)
guideline flare dosing for nsaid or selective cox2
full fda or ema approved dose of nsaid or a cox2 inhibitor…
*continue intitial trt at full dose until gout attack has completely resolved
guideline fare dosing
corticosteroids
1) assess extent of joint involvement
A) if 1-2 large joints: can consider IA CCS
B) all cases of gout:
ORAL:
a)prednisone 0.5 mg/kg/day
*duration: 5-10 dys then stop OR 2-5 days at full dose then taper for 7-10 days then stop
b) methylprednisolone dose pack (6 day course)
IA:
dose dpeends on joint size (w. or w.o oral trt)
IM:
traiamcinolone acetonide 60 mg, then oral prednison as above (WONT BE TESTED ON THIS)
combo therapy for acute gout attack
when to consider:
recommendations:
consider if
*severe attack (polyarticular)
*pts not responding to initial monotherapy
recommended combos
*nsaid +colchicine
*PO CCS+ colchicine
*IA CCS+ NSAID+/- colchicine
*IA CCS+ PO CCS_/- colchicine
NOTE: DO NOT USE PO NSAID AND PO CCS AS COMBO THERAPY
Gout chronic therapy gprinciples
not all pts require chronic therapy
lifestyle modification recommended for all pts, regardless of disease activity
chronic therapy=UA lowering therapy +Flare prophylaxis
*UA lowering therapy can illicit flares because remodeling of crystal deposits can dislodge? and trvael illiciting a flare elsewhere
*ppx flare therapy should be given concaminanly w. Uric acid lowering therapy (ULT)
chornic therapy shuold not be stopped during flare
Nonpharm recommendations for gout treatment
Stay hydrated
Exercise
Encourage smoking cessation
Healthy overall diet
*Limit alcohol intake
*limit purine intake (sweetbreads, liver, kidney, sardine, shellfish)
*limit high fructose corn syrup
*encourage lowfat or non fat dair products, vegetables
weightloss program if overweight or obese
indications for chronic ULT for gout
> 1 sq tophi, radiographic evidence of dmaage attributable to gout OR frequent flares (>/2 /years)
may consider trt if…
hx of >1 attack, but <2 attacks per year
those w. first gout flare w. following characteristics
AND any of these
CKD stage 3
UA> 9 mg/dL
urolithiasis (kidney stones)
if decision is made tht pt needs ult duraing a flare, it shouldbe initiated during a flare
chronic Therapy of gout goals
goal ua level:
what is 1st line trt:
when to montor ua levels:
if therapy not appropriate, what to do ?
how long is therapy and at what dose?
goal serum urate level: <6 mg/dL
allopurinol is 1st line gaent
UA levels should be monitored q 2-5 weeks w. increases in ULT intensity until goal is reached
*increase dose of XOI, add probenecid if appropriate
therapy required to reach goal of <6mg/dL shoul dbe continued indefinately
indication for swtch to pegloticase as chronic ULT
XOI trt, uricosurics, and other interventions failed to achieve goal UA levels, and pt continues to have >/2 flare/yr OR non reslovng tophi
Flare ppx
pps w. antiinflammatory meds should be intiated when ULT is intiated
same agents as for flare trt at diff dose
shold be continued for 3-6 mo.
based on resolution of symptoms and absence of tophi
serum UA lowering therapy PPX
when to initiate:
algorithm (including choices and doses)
when to initiate:
*w. or just prior to initiating ULT
CHOICES:
a)first line
*low dose colchicine 0.6 mg qd or bid OR
*low dose nsaids (ex naproxen 250mg)
b) second line
*low dose prednisone or prednisolone (</10mg/day)+PPI if indicated
*only used if colchicine and NSAIDS both not tolerated, CI, or ineffective
monitor and evaluate gout symptoms while on ULT
*if no signs and symptoms
a) continue ppx for atleast 6 mo!! OR
3mo after achieving target serum urate appropriate for pt (no tophi on physical examination)
*6 mo after acgieving target serum urate appropriate for pt (one or more tophi detected on physical examination)
NOTE: TREAT FOR WHICHEVER DURATION IS GREATER
*if SS of gout (flare in last 3 mo palpable tophi present)
a)continue ppx therapy
epidemiology of Osteoarthritis (OA)
disease of elderly as ppulations age
common: 1/5 ppl have OA
by 2040, 25.9% will have OA expected
reletavily expensive condition
$9233 per person
risk factors for OA
obesity
sex: men at oyungr, female at older
occupations (jobs that ave regular mechanical stress)
participation in certain sportss
joint injury or surgery
genetic predisposition
what is the #1 modifiable risk factor for OA
obesity
OA patho
Under normal conditions, cartilage matrix is subjected to a dynamic remodeling process in which low levels of degradative and synthetic enzyme activities are balanced, such that the volume of cartilage is maintained. In OA cartilage, however, matrix degrading enzymes are overexpressed, shifting this balance in favor of net degradation, with resultant loss of collagen and proteoglycans from the matrix
OA classifications
Idiopathic (primary): no known cause
Secondary (classified by cause)
*note: can also be classified by joint involvement
secondary causes of OA
traumatic (accidents)
gongenital/genetic:
metabolic: pagets disease, wilsons disease, nutritional defficiencies
neuropathic: Charcot arthropathy
HEmatologic: Hemophilia, sicklecell disease
Other: Gout, RA
ACR criteria for Hand OA
hand pain, aching or stifness and 3 or 4 of following treatments
1)hard tissue enlargement of 2 or more of 10 selected joints
2)hard tissue enlargement of 2 or more DIP joints
3)fewer han 3 swollen MCP points
4)deformity of atleast 1 of 10 selected joints
clinical features of hand OA
Signs
signs
bony enlargement of affected joints of affected joints
*heberdens nodes (develop slowly, non painful, lateral and medial aspects of the joint)
*bouchards nodes: same as heberdens nodes, at diff locations
limitation of range of motion
crepitus w. motion
pain w. motion
malalignment and/or joint deformity
Knee OA epidemiology
most common cause of arthritis and chronic disability among older ppl in US
radiographic abnormalities present in >30% persons>65 y.o
symptomatic kknee OA occurs in ~10% of ppl >65 yo
leading indication for >250k total knee arthroplasties in US / year
clnicnal features of knee OA
JOINT PAIN
MORNING STIFFNESS
JOINT INSTABILITY
LOSS OF FUNCTION
OCCASIONAL SYNOVITIS
bowleggednes (vargus)
knock knees (valgus)
ACR criteria for knee OA
clinical classification
knee pain and atleast 3 of following 6 criteria
1. >50 yo
2.stiffness lasting <30 min
3. crepitus (grating sound produced by friction of bone
4.bony tenderness
5.bony enlargement
6. no warmth to touch
*not most sensitive, least
clinical and lab classification if knee OA
clinical and lab classification
knee pain and atleast 5 of following 9 criteria
1. >50 yo
2.stiffness lasting <30 min
3. crepitus (grating sound produced by friction of bone
4.bony tenderness
5.bony enlargement
6. no warmth to touch
- esr <40 MM/HR
- rf<1:40
- Synnovial fluid: clear, viscous, or wbc <2000/mm^3
acr radiographic criteria fro knee OA
atleast 1 of following of 3
*age>50 y,o
*stiffness <30 min
*crepitus
AND osteophytes (detected by radiography)
least sensitivity, most specific (negatives are true negatives)
ACR criteria: HIP OA
HIP PAINand atleast 2 of folowing 3 features
*esr<20 mm/hr
*radiographic femoral or acetabular osteophytes
*radiographic joint space narrowing (superior, axial and/or medial)
89% sensitivity and 91 percent specitivity
clinical featurs of hip OA
hip pain: gradual onset, increases with joint use, relieved (incompletely) with reset
as the disease becomes more severe:
*morning stiffness and pain (up to 30 min)
*pain at rest or at night are common
STRONFEST clinical indicator is pain exacerbated by intern or external rotation of the hip while the knee is in full extension
non pharm treatment of OA considerations
can use more than one modality
consider pt comfort
exercise, braces, etc.
*un
non pharm management of hand OA
storngly recommended
*exercise
*self efficacy and self management programs
*first carpometacarpal (CMC) orthosis
conditionally recommended:
*heat or tpx cooling
*cbt
*acupuncture
*kinesiotaping
*hand orthosis other than CMC
*paraffin
non phar knee OA
storngly recommended
exercise
self efficacy and self management programs
weight loss(if overweight)
Tai-Chi
Cane
Tibiofemoral (TF) brace for TF OA
conditionally ecommended
*heat, tpx cooling
cbt
acupuncture
kinseotaping
balancetraining
yoga
patellofemoral (PF) knee brace for PF OA
radiofrequency ablation
non pharm treatment for hip OA
strongly recommended
exercise
self efficacy and self management programs
weightloss (if overweight)
tai chi
cane
conditonaly recommended
heat tpx cooling
cbt
acupuncutre
balance training
yoga
exercise considerations for OA
duration, intensity, frequency
*unknown
*driven by what pt is comfortable with
pt preference
patient access
possible options
*walking
*stationary bike
*isokinetic(dynamic contraction, speed control), isometric (static tension, maintains strength)
*rsistance training w. or w.o props
*aquatic exercise
Self efficacy and self management programs for OA
multi disciplinary group based on skill building and education
skill building
*goal setting
*problem solving
*positiv thinking
education
*fitness goals
*joint protection
*medication
other therapies for non pharmt trt of OA
Hand orthosis: goes over cmc joint: supporting joint
kinesiotaping: functions similarly to a brace but more flexible in terms of movement. tape supports hand and muscle of hands or knees
parrafin: wax that heats up
braces:
tibiofemoral (TF)
*patellofemoral (PF)
conditionally and strongly recommended against non pharm treatments for OA
knee OA:
TTENS(transcutaneous electrical nerve stimulation (TENS)
conditionally recommened against:
manual therapy (w. or w.o exercise)
massage therapy
modified shoes
wedged shoes
pulsed virbation therapy
hand OA
conditionally recommended against
*iontophoresis
hip OA:
strong recommended against
TENS
conditionally recommended against
manual therapy (w. or w.o exercise)
massage therapy
modified shoes
wedged insoles
pharm therapy for OA considerations
no disease modifying agents for OA
meds are for pain relief
pharm treatment for hand OA
(strongly recommended therapy)SRT:
oral NSAIDS
lowest possible dose thats effective for shortest duration as possible
conditionally recommended therapy (CRT)
topical NSAIDS
IA CCS
APAP
TRamadol
duloxetine
chondroitin