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Pharmacology
Drugs and their actions
52
Medical
Undergraduate 4
02/14/2012

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Term
Methotrexate
Definition
Inhibits DHFR (Antimetabolite), reversed by Leucovorin,
Term
5-Fluorouracil
Definition
Blocks the S-Phase, used in growing tumors. Interferes with conversion of deoxyuridylate to deoxythymidylate by the thymidylate synthase enzyme.
Term
Gemcitabine
Definition
Chain termination in DNA Synthesis. Competes with deoxycytidine
Term
Doxorubicin
Definition
Generates ROS's and thus: breaks DNA strands. DNA Intercollation generates strand breaks.
Term
Bleomycin
Definition
Copper chelating agent that intercollates with DNA. Generates ROS's that break DNA strands.
Term
Anthracyclines
Definition
Antibiotics that prevent the resealing step caused by Topo II resulting in strand breaks.
Term
Camptothecins (Topotecan)
Definition
Binds to Topo1/DNA complex. Results in strand breaks
Term
Podophyllins
Definition
Inhibit TopoII, results in strand breaks.
Term
Cyclophosphamide
Definition
Alkylating agent, transfers alkyl groups to guanine resulting in cross-linked DNA bases resulting in cell death or mutation
Term
Taxanes (Paclitaxel)
Definition
Bind to B-Tubulin, interfere with microtubule formation (inhibits mitotic spindles). Cells arrest in Metaphase
Term
Vinca Alkaloids (Vincristine, Vinblastine)
Definition
Microtubules fail to polymerize
Term
Cisplatin, Oxaliplatin
Definition
Crosslinks G's causes strand breaks.
Term
Bevicazumab
Definition
Antiangiogenesis, it inhibits VEGF.
Term
A-methyl tyrosine
Definition
Synthesis inhibitor for Norepinephrine
Term
Reserpine
Definition
Inhibits Norepinephrine storage
Term
Tricyclic Antidepressants
Definition
Inhibits the reuptake of Norepinephrine back into the neuron
Term
Guanethidine
Definition
Inhibits the release of Norepinephrine from the neuron
Term
Pargyline
Definition
MAO inhibitor. MAO degrades Norepinephrine into DOPGAL, therefore, Norepinephrine goes up.
Term
Dobutamine
Definition
Beta 1 agonist, increases contractility, heart rate, treats cardiac arrest
Term
Metoprolol
Definition
Beta 1 antagonist
Term
Amphetamines (MDMA, Adderall)
Definition
Displaces all Norepinephrine from the neuron.CNS stimulant, treats ADD, decreased appetite.
Term
Hemicholinium
Definition
Inhibits the uptake of Acetylcholine.
Term
Vesamicol
Definition
Inhibits the storage of Acetylcholine
Term
Botulinum Toxin
Definition
Inhibits the release of Acetylcholine from the neuron
Term
Nerve Gas
Definition
Irreversible Acetylcholinesterase inhibition
Term
Muscarine
Definition
Muscarinic (M1,2,3 agonists)
Term
Atropine
Definition
Muscarinic (M1,2,3 antagonists), blocks receptors, can cause tachycardia, decreases GI, relaxation of bronchi, mydriasis and cycloplegia.
Term
Latrotoxin (Black Widow Spider Venom)
Definition
Displaces Acetylcholine from the neuron
Term
Methylphenidate (Ritalin)
Definition
Dopamine/Norepinephrine reptake inhibitor
Term
Phenylephrine
Definition
A1 agonist, causes vasoconstriction, can controls bleeding, decongestant, mydriasis, and hypotensive emergencies.
Term
Clonidine
Definition
A2 agonist, Lower Norepinephrine release, causes vasodilation
Term
Salbutamol
Definition
B2 Agonist, Dilates bronchi, relieves asthma
Term
Tyramine
Definition
Norepinephrine displacer, stimulates the release of endogenous norepinephrine
Term
Ephedrine (Sudafed)
Definition
Mixed direct/indirect displacer of Norepinephrine
Term
Phentolamine
Definition
A1,2 antagonist (reversible)
Term
Carvedilol
Definition
A1,2/B1 Blocker, treats congestive heart failure
Term
Labetolol
Definition
A1,2/B1,2 Blocker, treats hypertensive emergencies.
Term
Nicotine
Definition
Nicotinic (Nn,m) agonist
Term
Hexamethonium
Definition
Nicotinic (n) antagonist
Term
Tubocurarine
Definition
Nicotinic (m) antagonist, blocks Ach on skeletal muscles via competition, Muscles will stop after 70% of receptors are blocked. Fast muscles are more sensitive than slow.
Term
Pralidoxime
Definition
Combats irreversible Acetylcholinesterase inhibition (as caused by nerve gas)
Term
Phenoxybenzamine
Definition
Irreversible blocker of A1,2
Term
Yohimbine
Definition
A2 antagonist, increases arterial blood to certain tissue
Term
Prazosin
Definition
A-1 Antagonist (reduces vasoconstriction and peripheral resistance, treats hypertension)
Term
Tamsulosin
Definition
A-1 Antagonist (reduces vasoconstriction and peripheral resistance, treats hypertension)
Term
Metoprolol
Definition
B1 Antagonist. Lower heart rate and contractility, lower renin, treats hypertension and angina
Term
Atenolol
Definition
B1 Antagonist. Lower heart rate and contractility, lower renin, treats hypertension and angina
Term
Bisoprolol
Definition
B1 Antagonist. Lower heart rate and contractility, lower renin, treats hypertension and angina
Term
Edrophonium
Definition
Reversible, Short acting/ temporary inactivation of Acetylcholinesterase.
Term
Neostigmine
Definition
Reversible Acetylcholinesterase inhibitor used to treat myasthenia gravis (Muscle weakness caused by lower Acetylcholine), glaucoma, paralysis induction.
Term
Ipratropium
Definition
Blocks muscarinic acetylcholine receptors in lungs. Used to treat asthma and open bronchi.
Term
Succinylcholine
Definition
Blocks Acetylcholine (via depolarization). Is short-acting (5 minutes), receptors are inactivated via overstimulation. It is used for relaxation during surgery, mechanical breathing (intubation)
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