random Flashcards
How would you treat MTX overdose?
leukovorin 15-25 mg PO Q6 hrs x for up to 10 doses
thalidomide - approval?
multiple myeloma: CAD
FDA: EN leprosum
thalidomide - 3 derm uses?
PG Behcets Chronic spontaneous urticaria BP Pompholyx
hydroxyurea - 5 s/e?
chemo drug so -> myelosupression, anagen effluvium, bacterial infecitons
known for ulcers and hyperpigmentation ; UTD eczema, xeroderma
HA, GI fox, anemia, arthralgia, 2’ malignancies from suppression
MMF - active metabolite?
mycophenolic acid
6 MP - mercaptopurine is AZA, do not confuse
MMP MOA?
MA: Marine -> + BAPTIzeD
T/B cells -> Iono monophosphate or xanthine monophosphate -> iono monophosphate dehydrogenase -> guanosine monophosphate -> purine metabolites blocked
T cells don’t have salvage pathway to go through
decreases B cell production, Ab synthesis
decreases purine synthesis
T cell production
pro-Inflammatory cell recruitment decreased due to down regulation of E/P selectins
ZZZ - fibrosis -> decreases action of fibroblasts involved in tissue fibrosis
dendritic cells - exerts effect on
MMF MC S/E?
GGreaT CHIN
GI upset dose dempendent
divide doses, enteric coated tablets, take with food, give tiem
MMF - 5 side effects?
GGreaT CHIN floating above water
GI - N/V/D, GI upset, loose stools, ANAL tenderness ~~~~~
GU - sterile pyuria ~~~, dysuria, frequency, urgency , NO nephrotoxicity
T - teratogenic EEC - ears, eyes, cleft
Carcinogenic - lymphomas, conflicting NMSCa
Heme - agranulocytosis, neutropenia, anemia
Infections - ZOster > bac > viral
Neuro - weakness, fatigue (“swim”), tinnitus (“water in ears”), insomnia
drug that increases MMF availability?
probenecid
antivirals (acyclovir) decrease tubular excretion
salicylates - displace from protein
others in notes: cholestyramine, Abx
what is the difference btwn MMF and MPA? brands?
mycophenolic acid = MMF
active metabolite MPA = myfortic`
MMF - what does it act on ?
“lymphocytes”, T cells»_space; B cells - inhibits purine metabolites, T/B cells have no salvage pathway
what does of MMF increases infection rates
> 2 g/day
MMF typical dose?
start at 500 and slowly bring to 2-3 g /daily divided into BID (aka 1000 mg BID)
difference between myfortic and cell cept
myfortic = EC-MPA (720mg, equivalent to 1 g MMF) cellcept = MMP
MMF - c/i
absolute: pregnancy, hypersensitivity
relative: chin to belly button
lactation
peptic ulcer dz
cardiopulmonary dz
renal dz
hepatic dz
DRUG INTERACTION (CHLESTYRAMINE)
MMF - how many weeks/months before pregnancy?
6 weeks
CsA - 6 s/e?
HeLLMans Real Good or derm and non-derm
Hypertrichosis HyPOMg, HyperK, HyperUricemia Heme abn - anemia, lymphopenia, neutropenia Hyperplasia - Gingival Lipids - hypertriglycerema Liver - transaminase elevation Malignancy - CTCL, NMSCa
Renal
GI
Cutaneous: acne epidermoid cysts sebaceous hyperplasia NMSCa hypertrichosis gingival hyperplasia
or F THINGS - flushing trichomegaly trichodysplasia spinulosa hypertrichosis
infections NMSCa gingival hyperplasia, sebaceous hyperplasia, acne
skin s-e (5) of CsA?
Cutaneous: acne epidermoid cysts sebaceous hyperplasia NMSCa hypertrichosis gingival hyperplasia
or F THINGS - flushing trichomegaly trichodysplasia spinulosa hypertrichosis
infections NMSCa gingival hyperplasia, sebaceous hyperplasia, acne
drugs that will increase renal tox in CsA?
CANTS Cimetidine ampho B/azoles NSAIDS (renal yo) Tacrolimus (same classs = bad news) Septra - every list
relative C/I for CsA
2 Ds and a I
drugs - drugs that can interfere with absorption or metabolism of cyclosporine, esp renal dysfunction
drugs - phototherapy, MTX and other immunosupresants = > cancer increase
demographics - pregnant
demographics - lactating
demographics - <18 > 65
demographics - unreliable
infection - active infection
infection - vaccination , live
infection - immunodeficiency
adalimumab - structure?
fully human mono Ab
6 s/e of adalimumab?
injection site reaction drug induced LUPUS! increased risk of infections NMSCA increased risk malignancy increased risk
c/i with CHF and demyelinating conditions
adalimumab - approval? dose?
PsO and PsA in adults Ank Spond RA UC /Crohns uveitis HS JIA
adalimumab - PsO dosing
80 mg x 1 , 40 mg at W1 and Q2 W
advantage of quantiferon?
previous BCG, unreliable (faster results), pts on immunosurpession
atypical antipsychotics - MC s/e? 5 others?
sedation
metabolic - weight gain, hyperlipidemia, gynecomastea
DM, seizures, h/a
decreased sex drive
QT prolongation important
3 metabolic pathways of CsA?
CYP3A4, CYP3A5, p glycoprotein?
5 drugs that can increase CsA levels?
Stop Cyber Kids From Eating Grapefruit and Plums Abx AntiHTN Other Septra statins SSRIs cimetidine CCBs cephalosporine ketakonazole, other azoles furosemide erythromycin, other macros Grapefruit PROTEASE INHIBITORS aka antivirals
INHIBIT CYP 3A4
drugs that induct CYP3A4 aka can decrease CsA levels?
anti seizure meds basically (destimulate brain but stimulate CYPS)
CROPS carbamazepine RIFAMPIN OCTREOTIDE phenytoin phenobarb St jons wort glucocorticoids in some lists
CsA dose?
3-5 mg/kg
start at 3 mg divided BID
5 TNFs? administration ? molecule?
adalimumab, SQ, fully human golimumab, SQ/IV, fully human infliximab, IV, humanized (X) - chimeric certolizumab pegol, SQ/IV, human etanercept, SQ, fusion p75 TNF and FC - fully humanized
MOA of 5 FU
DNA and RNA
thymidylate synthase (TS) inhibitor DO NOT CONFUSE with THYMIDINE KINASE - viral
blocks synthesis of nucleotides required for DNA (scarcity of dTMP)
incorporates into RNA - > damage and termination of translation
Nature:
5-Fluorouracil (5-FU) can activate p53 by more than one mechanism: incorporation of fluorouridine triphosphate (FUTP) into RNA, incorporation of fluorodeoxyuridine triphosphate (FdUTP) into DNA and inhibition of thymidylate synthase (TS) by fluorodeoxyuridine monophosphate (FdUMP) with resultant DNA damage.
5 FU - approved indications?
AK: BID x 2 weeks face, 4-6 weeks body
sBCC BID 3-6 weeks
what cytokine does CsA down regulate?
IL 2
MTX - 3 ways to decrease GI tox?
SQ, decrease dose, split dose (esp PO into 3 doses Q 12)), folic acid
rituximab - cell target?
CD20 Mature T cells
ritux - 4 c/i?
CAN: hypersensitivity, severe infection, progressive multifocal leukoencephalopathy (IL)
BHA yo
hx of bronchospasm
HYPOtension
angioedema
aka infusion reaction - if any of these would make way worse
ritux dose?
1000 mg IV x 2 separated by 2 weeks
or 375 mg/m2 Week x 4 heme
2 derm indications of ritux? others?
GPA, MPA
NHL, CLL, RA
Canadian : cd 20 + diffuse large B cell , follicular cd 20+ , nhl
ritux - 5 s/e
MC - infusion rxn ; A Right TITI
Anemia, Tumour lysis, Infection, Tumours (SCC< Merkle), Infusion
Usuals: HTN, N/URTI, arthralgia, pyrexia, pruritis
infection - bacterial, viral, fungal
progressive multifocal leukoencephalopathy
tumour lysis syndrome - rapid decline in renal fxn
malignancy (SCC and Merkel reported)
cytopenia - late onset usually (weeks to months, neutropenia)
infection reactivation like Hep B, JC virus
ritux - 6 investigations?
CBC (cytopenias)
HIV
Hep B/C
TB + CXR
CBC Q2 weeks during Tx and Q1-3 weeks thereafter
for pemphigus, titres Q6-12 months, titres will rise before sx - retreat
ritux - 5 off label skin indications?
BP, PV, PF, paraneoplastic, EBA, MMP DM and SCLE GVHD VASCULITIS - including eGPA/GPA (official indication), cryoglobulinemia, HPS B cell lymphoma
which drug should not be combined with ritux?
cisplatin - increased tox
Vaccines - live and not recommended on immunosuppressants?
ROME Is MY Best Vacation
Rubella
oral polio
Mealses,
Influenza, oral
Mumps
Yellow fever
bCG
VZV
SHINGRIX is not LIVE, zostavax is live but less effective
when to administer vaccines before biologics?
ideally 4 weeks prior
PHARma
Polio IM pneumococcus HPV Hep A/B Rabies
ma
which cells are CD20+
transitional B cell
mature B clel
memory B cell
Plasma cell (CAN BE CD20 + or negative)
essentially CD20 - plasma cells in the bone marrow continue producing Ig and CD20- cells that are long lived continue to protect against antimicrobial Ab, but short lived plasmas which tend to be reactive are wiped
ritux - MOA
CHIMERIC murine human Ab against CD 20 (chimeric so like infliximab way more infusion rxns)
-> depletes CD20+ B cells which tend to be auto reactive (immature, transitional, mature and memory)
kill cells via 3 ways -> complement mediated, Ab-dependent via NK cells, inhibition of growth signals and induction of apoptosis
also shown to decrease regulatory T cells
MTX + septra -> risk?
myelosupression/bmt failure
biologics - which vaccines c/i?
Rome Is my best vacation
VZV, MMR, BCG, influenza oral, oral polio, zostavax
dupi - which 2 IL targeted
targets IL 4 R
Type 1 - IL 4
Type 2 - IL 4 and13
3 IL 23s?
guselkumab, tildakizumab, risankizumab
Tilda swinton wearing Bjorks Goose dress - couldn’t rise to sky
guselkumab dose?
SQ 100 Q0, 4 and Q8 (g 8 se)
skyrizi dose?
150 W 0, 4, 12 and Q12
skyrizi - approval for?
IL 23, PsO
tildrakizumab - IL, approval, dose?
100 mg (sky rizi is the only one 150 in IL 23 b.c “higher in the sky”)
PsO - adults
SQ 0, 4, Q12
IL 23 s - s/e
URTIs MC
injection site rxns
arthralgia
GI reported including diarrhea
increased transaminases in PsA Guselkumab