Autoimmune Dx - Rheumatoid Arthritis Flashcards
Describe RA?
Chronic, symmetrical, systemic and progressive dx
Where does RA typically first presents?
Hands and feet
What’s the results of the inflammation that leads to cartilage and bone destruction in RA?
Classic sx of RA
Joint swelling
Stiffness
Pain
Bone deformity (eventually)
List the diagnostic criteria for RA
Morning stiffness around joints lasting > 1 hr
Soft tissue swelling (arthritis) in 3 or more joints
Swelling (arthritis) of hand, foot or wrist joints
Symmetric involvement
Rheumatoid nodules
Positive serum rheumatoid factor (about 70% of pts)
Radiograph in erosions or peri articular osteopenia in hand or wrist joints
Howz diagnosis of RA made using the diagnosis criteria?
Criteria 1-4 must be present for >= 6 weeks
AND
4 or more criteria must be present
Describe the articular manifestations (affecting the joints) of RA?
Almost always Polyarticular and Symmetrical
Which synovial joint is most often involved in RA?
Finger joints of the hand
Wrists
Knees
Toe joints
List the typical articular sx of RA
Morning stiffness
Swelling
Redness
Edema
Pain
Decreased range of motion
Muscle atrophy
Weakness
Deformity
What sx is the clue of RA and differentiates RA from Osteoarthritis (OA)
Morning stiffness that may last for up to 2 hrs is a clue for RA (OA doesn’t cause prolonged stiffness)
List non-pharmacologic tx of RA?
Rest
Physical therapy
Occupational therapy
Exercise
Diet
Weight control
Surgical intervention (eg. Joint replacement)
What’s the goal of pharmacologic tx of RA?
Goal is to have pt on Disease-Modifying-Antirheumatic Drug (DMARD) within 3 months of diagnosis
T/F? Pts may require bridging therapy (short-term) or in some cases long-term use of anti-inflammatory medications such as NSAIDs or steroids.
True
List agents used for pain and inflammation
NSAIDs
COX-2 selective inhibitor
Steroids
List NSAID used as agent used for pain and inflammation
Ibuprofen (Motrin, advil)
List COX-2 selective inhibitor used as agent used for pain and inflammation
Celecoxib (Celebrex)
List steroids used as agent used for pain and inflammation in RA
Prednisone (Prednisone intensol -solution; Rayos - delayed release tablet)
What’s the indication of steroids for RA?
Indicated for acute inflammation/pain and as bridge therapy while waiting for DMARDs to take effect
At what dose is steroid used when used chronically in RA?
<= 10 mg daily
List DMARDs used for RA
Methotrexate (Rheumatrex, Trexail)
Hydroxychloroquine (Plaquenil)
Sulfasalazine (Azulfidine)
Minocycline (Minocin)
Leflunomide (Arava)
Tofacitinib (Xeljanz)
What’s the brand name of methotrexate? (DMARD)
Rheumatrex
Trexail
What’s the brand name of hydroxychloroquine? (DMARD)
Plaquenil
How’s methotrexate (Rheumatrex, Trexail) used in RA?
Low weekly doses are used for RA (weekly doses can be split into smaller doses taken over 12-36 hours
Should methotrexate (Rheumatrex/ Trexail) be dosed daily in RA?
Never
What’s the SE of methotrexate (Rheumatrex/ Trexail)?
Nausea
Vomiting
Increased LFTs
Stomatitis
Alopecia
Photosensitivity
What’s the monitoring parameters for methotrexate (Rheumatrex/ Trexail)?
LFTs and SCr (at baseline and every 2-4 weeks for 1st 3 months)
Chest x-ray, hep B & C at baseline
Can methotrexate (Rheumatrex/ Trexail) be used during pregnancy?
Pregnancy category X
What’s usually given to decrease the SE of methotrexate (Rheumatrex/ Trexail)?
Folic acid 5mg PO weekly given on the day following methotrexate admin
Which methotrexate med was recently approved? Unique use?
Otrexup
Allows patients to self-admin methotrexate SC once weekly using an auto-injector
What’s the SE of hydroxychloroquine (Plaquenil)? (DMARD)
Nausea
Diarrhea
Rashes
Pigmentation of skin and hair
Weakness
Vision changes (rare)
What’s the contraindication to sulfasalazine use?
Pts with sulfa or salicylate allergy
GI or GU obstruction
Porphyria
SE of sulfasalazine?
Headache
Anorexia
Dyspepsia
GI upset (N/V/D)
Oligospermia (reversible)
Rash (all > 10%)
Folate deficiency
Arthralgias
Crystalluria
Effect of sulfasalazine on skin/urine?
Can cause yellow-orange coloration of skin/urine
Effect of sulfasalazine on folate absorption?
Impairs folate absorption
May give 1mg/day folate supplement
How do u prevent Crystalluria from sulfasalazine use?
Take sulfasalazine with food and 8oz of water