Pharm 3 Flashcards
What’s the first line of treatment in RA?
methotrexate
How does methotrexate work?
inhibits dihydrofolate reductase leading to decreased folic acid supplies
Methotrexate MOA
decreases cell proliferation; increases apoptosis of T cells; increases adenosine release; alters expression of CAM; inhibits pro-inflammatory cytokies
SE of methotrexate
mucosal ulcers, stomatitis, nausea, diarrhea, alopecia, anemia
When is methotrexate contraindicated?
pregnancy
Dose for leflunomide?
10-20 mg qd after LD of 100 mg for 3 days
LD or leflunomide is associated with?
severe diarrhea and may be skipped
Leflunomide mechanism
inhibits mitochondrial dihydroorotate dehydrogenase (DHODH) ultimately resulting in decreased DNA and RNA in rapidly dividing cells
Leflunomide is approved for?
RA
SE of Leflunomide?
diarrhea, alopecia, elevated liver enzymes, weight gain, increased BP
Sulfasalazine dose
maintenance dose 1 gram bid-tid
SE of Sulfasalazine
N/V, HA, rash, rarely anemia and methemoglobinemia and neutropenia; reversible infertility in men but not women
Is Sulfasalazine ok in pregnancy?
yes
Hydroxychloroquine dosing
200 mg bid
What type of drug is Hydroxychloroquine
anti-malarial
How long is it to see an effect on Hydroxychloroquine
3-6 months
Does Hydroxychloroquine impact bone changes in RA?
no
SE of Hydroxychloroquine
retinal damage if doses exceed 6 mg/kg/day, GI issues, rash, nightmares
Is Hydroxychloroquine safe in pregnancy?
Yes
Hydroxychloroquine and diabetes?
may improve glucose profiles in diabetic patients and lower A1c
Hydroxychloroquine and cardiac risk?
LDL, HDL, TG improvement
Ultimately how does Hydroxychloroquine help RA?
helps symptomatically, but not with bone changes
Tofacitinib dose
5 mg bid
What type of drug is Tofacitinib
Janus Kinase Inhibitor–suppresses immune response
When is Tofacitinib used?
in combo with MTX or alone in moderate to severe disease where MTX failed or cannot be used
When does Tofacitinib dose need to be decreased to 5 mg qd?
if patient is on a CYP3A4 or CYP2C9 inhibitors or has moderate to severe renal or liver impairment
Does Tofacitinib decrease joint damage?
no
Avoid Tofacitinib in conjunction with?
immunosuppressants and live vaccines
Tofacitinib SE?
HA, diarrhea, URI, rarely GI perforation
Examples of anti-TNF agents
etanercept, infliximab, adalimumab, certolizumab, golimumab
Examples of non-TNF agents
abatacept, rituximab, tocilizumab
SE of TNF-alpha inhibitors
injection site reaction, infection, new onset psoriasis, increased risk of leukemia and lymphoma
Contraindications for TNF-alpha inhibitors
presence of serious or recurrent infections
TNF-alpha inhibitors should be avoided in?
patients with class III or higher HF and EF less than 50% as well as patients with demyelinating diseases
What happens if a patient needs TNF-alpha inhibitor therapy?
meds must be held for duration of treatment
What should patients be tested for prior to starting a TNF-alpha inhibitor?
TB
Types of non-TNF agents
B cell depleters, t cell co-stimulation inhibitors, IL-6 inhibitors
SE of B cell depleters
infusion reactions, rash (30%) with first infusion then decreases with subsequent infusions
Contraindications of B cell depleaters
presence of serious or recurrent infection, type 1 allergic reactions to murine proteins
T cell co-stimulation inhibitors SE
infusion, reactions, increased risk of lymphoma
Contraindications of T cell co-stimulation inhibitors
presence of serious or recurrent infection
IL-6 inhibitors SE
infusion reactions, infection, increased lipids, URI, HA, HTN, elevated liver enzymes, decreased neutrophils, decreased platelets, GI perforation (esp in diverticulitis and on corticosteroids)
What should patients be screened for before staring an IL-6 inhibitors?
TB
Which two drugs may decrease risk of diabetes?
hydroxychloroquine and TNF inhibitors
Pregnancy is a contraindication for which two drugs?
MTX and leflunomide
When are biologics recommended?
only after nonbiologic failure in patient with poor prognosis or failure of two nonbiologic regimens in patients without poor prognosis; given with MTX
What are our four drugs for acute gout treatment?
fast-acting NSAIDs, Cox-2 inhibitors, corticosteroids, colchicine
First line therapy for acute gout?
Fast-acting NSAIDs
Fast-acting NSAID examples
indomethacin, naproxen, sulindac
When do you begin fast-acting NSAIDs during an acute gout attack?
first 24 hours
Dosing for fast-acting NSAID for gout
High dose for 2-3 days then step down over 2 weeks and continue for 2 days after resolution
Issue with cox-2 inhibitors?
increased CV risk
How are corticosteroids administered in acute gout?
Intra-articular injection is highly effective in large joints and when limited to one or two locations; could do oral for small joints
Issue with indomethacin?
can cause CNS issues in the elderly
Colchicine MOA
binds intracellular tubulin ultimately leading to inhibition of leukocyte migration and phagocytosis -> anti-inflammatory effects
Common colchicine dose?
0.6 mg qd-bid
What are our two xanthine oxidase inhibitors?
allopurinol, febuxostat
What is the standard of care for chronic gout?
allopurinol
allopurinol dose
100 mg qd then increase 100 mg qd every 1-4 weeks until goal serum level is reached (lower dose for renal disease)
When do you start allopurinol for gout?
Give with NSAID or colchicine initially until uric acid levels are less than 6 mg/dl then slowly D/C (over months)
SE of allopurinol?
GI disturbance, HA, rash, rarely cataracts, aplastic anemia, peripheral neuritis
Does allopurinol work in an acute attack?
NO
Febuxostat dosage
40-80 mg qd; in clinical trials, 80-120 mg was more effective at lowering uric acid than 300 mg allopurinol regardless of overproduction or underexcretion
What should you use febuxostat with?
NSAID or colchicine
SE of febuxostat
elevated LFTs, diarrhea, HA, nausea
What’s the concern with febuxostat
cardiovascular events in higher doses
Metabolism of febuxostat
liver, so no need for renal adjustment
urate oxidase enzyme example
pegloticase
What is pegloticase?
recombinant mammalian uricase attached to PEG
MOA of pegloticase
Catalyzes oxidation of uric acid to allantoin (inert and soluble)
Dosing of pegloticase
Given as IV infusion every 2 weeks; optimal length of treatment not established
what should be given with pegloticase?
NSAID or colchicine prophylaxis needed for first 6 months of treatment
SE of pegloticase
infusion reactions (premed with antihistamine and corticosteroid), gout flares, nausea, bruising
You should not use pegloticase in who?
Do not use in G6PD deficiency; screening of patients of African and Mediterranean decent recommended
What happens with the immune system and pegloticase?
Patients will develop immune response to pegloticase (92%) – increased risk of infusion reactions seen as well as decreased efficacy
Drugs that cause gout
thiazides, niacin, levodopa, cyclosporine, aspirin
Lupus drugs
hydroxychloroquine, NSAIDs, immunosuppressants and corticosteroids, biologics
Hydroxychloroquine does what for lupus
decreases flare ups
Efficacy of hydroxychloroquine decreases with
smoking
When are immunosuppressants and corticosteroids used for in lupus?
serious or life threatening lupus
Examples of lupus biologics
belimumab, rituximab
Which biologic is useful in decreasing symptoms in mild lupus
belimumab
which biologic is useful in resistant lupus
rituximab
What % of lupus is drug induced lupus
10%
Does drug-induced lupus resolve?
Typically resolves after drug d/c but may take weeks to months
Common drug induced lupus agents
hydralazine, procainamide, isoniazid, methyldopa, quinidine, minocycline, chlorpromazine
Age differences in SLE vs DILE
SLE age 20-40; DILE 50
sex differences in SLE vs DILE
SLE: women DILE: both
onset differences in SLE vs DILE
SLE: gradual; DILE: sudden
severity differences in SLE vs DILE
SLE: can be severe; DILE: remains mild
Hepatomegaly differences in SLE vs DILE
SLE: hepatomegaly less common; DILE: hepatomegaly common
anti-double strand DNA antibody differences in SLE vs DILE
SLE: 50-70%; DILE: rare
anti-smith differences in SLE vs DILE
SLE: 20-30%; DILE: rare
hypocomplimentemia differences in SLE vs DILE
SLE: 50-60%; DILE: rare