Gout and Rheumatoid Drugs Flashcards
What is Podagra
1st MTP joint becomes red and painful
textbook sign of gout
What is gout
build up of uric acid crystals in the kidneys and joints
What type of immune response causes gout
type 3 immune mediated
What can cause gout
Purine-rich diet
Alcohol (beer especially)
Kidney disease
Why is gout treated therapeutically
To lower uric acid levels (<6mg/dl)
To prevent deposition of uric acid crystals
What are the ways to prevent uric acid build up
interfere with uric acid synthesis
Increase uric acid secretion
Inhibit immune cells entry into the joint
decrease inflammation
What is the gold standard for preventing future gout attacks
Allopurinol and febuxostat
WILL NOT TREAT
What can be used for acute gout attacks
Indomethacin and NSAIDs (Naproxen)
What drug can be used for both acute attacks and prevention
Colchicine
What are the two stages of gout
Acute and chronic
What stage of gout is indomethacin used in and what does it do
Acute attacks
Decreases granulocytes in the area which prevents inflammation
What stage of gout are NSAIDs used in and what does it do
Acute attacks
For pain control (DO NOT USE ASA)
What stage of gout is colchicine used in and what does it do
Acute mostly but can be both
Decreases immune cell chemotaxis
What stage of gout is allopurinol used in and what does it do
Chronic
purine analog that inhibits uric acid synthesis
What stage of gout is probenecid used in and what does it do
Chronic
Promotes uric acid excretion and inhibits the secretion of NSAIDs
What can cause an acute gout flare
A quick decrease in serum rate concentration
Why does a rapid decrease in serum rate concentration cause gout flares
Urate lowering disrupts the physical state and or surface chemical composition of preformed crystal deposits-> component crystals interact with local cells = inflammation
Which class of DMARDs is often used first and why
Non-biologics because they are safer and cheaper
What are DMARDs used for
RA and other inflammatory arthritis
At what point are DMARDs introduced to RA treatment
When intrinsic autoimmune response is going crazy and normal drug options have been exhausted
How to DMARDs help in the treatment of RA
Slow the course of disease
induce remission
Prevent further joint damage
When is the best time to initiate DMARD treatment
Within 3 months of diagnosis for best possible results
What does folate help with in the body
Maintains purine and thymidine synthesis in oral dividing cells
What does methotrexate interfere with
folate metabolism
How does methotrexate work
Acts as a competitive inhibitor for the enzyme dihydrofolate reductase = inhibition of lymphocyte proliferation in RA
What needs to be supplemented when taking methotrexate
folic acid
What’s a benefit of prescribing methotrexate
It can be combined with other DMARDs
How long does it take the body to respond to methotrexate
3-6 weeks
Common side effects of methotrexate
Mucosal ulceration and nausea
myelosuppression (Cytopenia)
Hepatotoxicity
hypersensitivity pneumonitis
What are common CNS side effects from methotrexate
Headache
fatigue
malaise
impaired ability to concentrate