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Drug 2 MOA
Step 1 Review
41
Medical
Graduate
12/23/2012

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Term
Tetracyclines
Definition
Binds 30S subunits, prevent attachment of aminoacyl-tRNA
Term
alpa-amanitin
Definition
Inhibits RNA polymerase II
Term
Fluoroquinolone
Definition
Inhibit DNA gyrase
Term
Hydroxyurea
Definition
Inhibits ribonucleotide reductase
Term
6-mercaptopurine (6-MP)
Definition
Blocks de novo purine synthesis
Term
5-fluorouracil (5-FU)
Definition
Inhibits thymidylate synthase (decrease dTMP)
Term
Methotrexate (MTX)
Definition
Inhibits dihydrofolate reductase (decrease dTMP)
Term
Trimethoprim
Definition
Inhibits bacterial dihydrofolate reductase (decrease dTMP)
Term
Aminoglycosides
Definition
Binds 30S and inhibit formation of initiation complex and cause misreading of mRNA
Term
Chloramphenicol
Definition
Inhibits 50S peptodyltransferase; blocks peptide bond formation
Term
Macrolides
Definition
Blocks translocation
Term
Clindamycin
Definition
Block peptide bond formation
Term
Oubain
Definition
Inhibits Na/K pump by binding to K site
Term
Cardiac glycoside (digoxin & digitoxin)
Definition
Directly inhibit Na/K ATPase (leads to inhibition of Na?Ca exchange --> Increasing Ca and INcrease contractility
Term
Avidin
Definition
Binds Biotin (found in raw eggs)
Term
Vitamin C deficiency
Definition
Scurvy
Term
Fomepizole
Definition
Inhibits alcohol dehydrogenase (antidote for methanol and ethylene glycol poisoning)
Term
Disulfiram
Definition
Inhibits acetaldehyde dehydrogenase
Term
Rifampin
Definition
Inhibits RNA polymerase
Term
Actinomycin D
Definition
Binds to DNA inhibits RNA polymerase chain elongation in both eukaryotes and prokaryotes
Term
Vemurafenib
Definition
BRAF kinase inhibitor
Term
nitroglycerin, nitroprusside, dinitrate
Definition
Converted to NO, which activates guanylate cyclase, leading to increase in cGMP which activates protein kinase G.

cGMP causes smooth muscle relaxtion of blood vessels.
Term
Sildenafil
Definition
Inhibits cGMP-dependent phosphodiesterase (PDE5), leading to cGMP build up causing smooth muscle relaxation
Term
Methylene blue
Definition
Reduce Fe3+ to Fe2+
Term
Desmopressin
Definition
Increases vWF release from Weibel-Palade bodies of endothelial cells
Term
Coumadin (warfarin)
Definition
Blocks epoxide reductase
Term
Aminocaproic acid
Definition
Blocks activation of plasminogen
Term
Heparin
Definition
Activates Antithrombin III
Term
2-CDA (cladribine)
Definition
adenosine deaminase inhibitor
Term
Imatinib
Definition
Tyrosine kinase inhibtor
Term
Rituximab
Definition
anti-CD20 Antibody
Term
Finasteride
Definition
Competitive specific type II 5-alpha reductase inhibitor
Term
Flutamide
Definition
Inhibitor of androgen uptake and binding to receptors
Term
Allopurinol
Definition
xanathine oxidase inhibitor
Term
Probenecid
Definition
Inhibits reabsorption of uric acid in PCT
Term
Colchicine
Definition
Binds and stabilizes tubulin to inhibit polymerization , impairing leukocyte chemotaxis and degranulation
Term
Methotrexate
Definition
Folic acid analog that inhibts dihydrofulate reductase
Term
5-Fluroouracil (5-FU)
Definition
Pyrimindine analog that complexes folic acid and inhibits thymidylate synthase
Term
Cytarabine
Definition
Pyrimidine analog -> inhibition of DNA polymerase
Term
Azathiprine
6-mercaptopurine (6-MP)
6-Thiogunaine (6-TG)
Definition
Purine analog -> decreases de novo purine synthesis
Term
Maraviroc
Definition
CCR5 co-receptor antagonist (prevemnts interaction w/ gp-120)
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