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59 Cards in this Set

  • Front
  • Back
Allopurinol MoA
Inhibits xanthine oxidase
Isoniazid
-MoA
- SE
MoA: Nicotinic acid derivative that inhibits synthesis of mycolic acid in mycobacteria wall

SE: Causes pyridoxine deficiency leading to peripheral neuropathy & sideroblastic anemia
Succinycholine
- Use
- MoA
- Duration of action
Use: Depolarizing agent used as muscle relaxant during surgery

MoA: Binds to nicotinic receptors in skeletal muscle causing persistent depolarization at motor end-plate.

Duration: 5-10 minutes

Effects are not reversed by cholinesterase inhibitors - no pharmalogic antidote to OD.
- some pts have atypical cholinesterase & can't metabolize drug.
Preganglionic Neurotransmitter Acetylcholine
- activates muscarinic and nicotinic receptors

- muscarinic effects:
1) pupillary miosis (contracts iris sphincter, used after cataract surgery)
2) accomodation of lens for near vision (contracts ciliary muscles) 3) bronchconstriction
4) SA node effect (slows HR)
5) AV node effect (increase PR interval)
6) Stimulate GI secretions
7) Stim. GI motility (enteric nervous system stim)
8) Micturition (stim detrusor muscle, which relaxes internal sphincter of bladder)
Nitric Oxide
-Use
-MoA
-Acetylcholine
Use: Potent vasodilator in endothelial cells

MoA: inactivates myosin light chain kinase in SM cells leading to vasodilation.

Acetylcholine: can lead to its synthesis when injected into vessels.
Woman in 3rd trimester has premature contractions.

-DOC
-MoA
DOC: Terbutaline
MoA: selective Beta-2 adrenergic receptor agonist that inhibits uterine contractions.
Effect of aspirin on the kidney
Decrease PGE2 synthesis (vasodilator) leading to unopposed AT II effect & renal papillary necrosis
Methotrexate
-MoA
- SE
MoA: Blocks dihydrofolate reductase - macrocytic anemia due to folate deficiency.

- S phase inhibitor

Use: interstitial fibrosis in lungs.
Peripheral neuropathy & cancer drug:
Vincristine
Nerve-ending locations affected by botulinum poison, reserpine, guinethidine
That's it.... just a free information slide!!!! HA
MoA of Sucralfate
- viscous polymer of sucrose octasulfate + aluminum hydroxide that adheres to ulcer crater
- Stimulates PGE2 in mucous cells (responsible for mucous border)
Effect of mixing statin drugs w/niacin
- rhabdomyolysis: each drug by itself can produce rhabdomyolysis
MoA of Amphotericin B
- Binds ergosterol in fungal cell membrane (increases permeability)

Note: Nyastatin has same mechanism
Moa of Clotrimazole
- inhibits ergosterol synthesis

Note: other azole compounds have similar action.
MoA of Flucytosine
inhibits nucleic acid synthesis
MoA of Grisefulvin
inhibits microtubule function & mitosis
Define potency
measure of efficacy in terms of a drug
Define Efficacy
the ability to provide a clinically measurable effect
Propyithiouracil
- DOC
- Can it be used in pregnancy?
DOC: decreasing synthesis of thyroid hormone in Grave's disease & Agranulocytosis

Preganancy: yes
Fastest way to increase HR in shock:

- Best drug for to increase HR and renal vasodilation
Meds w/decreasing effectiveness:
1) isoproterenol
2) Dobutamine
3) Dopamine

- Dopamine in low doses.
Dapsone
-Sulfone that inhibits synthesis of folic acid by M. Lepae

- may precipitate hemolytic anemia in G6PD deficiency

- May produce methemoglobinemia, nephrotic syndrome & peripheral neuropathy.
Prolongation of QRS on ECG:
Quinidine
Anticonvulsant/antiepileptic drug w/effect on epiphyseal plate:
phenytoin via its revving up of cytochrome system int eh liver and causing Vit D deficiency (increased metabolism of 25 hydroxylated Vit D)
MoA of Ondansetron
- Selective serotonin 5-HT3 receptor antagonist.

- useful in blocking chemoreceptor trigger zone (CTZ) in the area postrema, hence preventing vomiting.
Opioid OD
Respiratory depression - respiratory acidosis
-miotic pupils.
First Rx of Alcoholic in ER
IV thiamine to prevent acute Wernicke's encephalopathy.
Heparin: MCC of _____ in hospital
MCC of thrombocytopenia in hospital
Acute Rx for Coumarin OD when bleeding is life-threatening:
- what about when it is less serious bleeding?
fresh frozen plasma best choice.
-Use IM Vit K for less serious bleeds.
Nitrofurantoin:
-Where concentrated
- Class
- Concentrated in urine

- Urinary tract antiseptic
Cyclophosphamide:
- SE
- Where activated?
- Hemorrhagic cystitis, transitional cell carcinoma

- Activated (not metabolized) in the liver.
Doxorubicin & Prednisone is metabolized where?
Liver
How do you prevent gout after cancer therapy?

What is the danger?
Prevent by giving allopurinol (xanthine oxidase inhibitor)

Danger of urate nephropathy
What drug would prevent muscle fasciulations after neuromuscular block?
Initial effect of succinycholine
MoA of Levodopa
Blocks peripheral dopa decarboxylase
Bronchial Asthma
-Mild/Mod
- Severe
Mild/Moderate: Albuterol

Severe: Corticosteroid
Rx of paroxysmal supraventricular tachycardia
Adenosine, including its association w/WPW syndrome
MoA of Clonidine:
Activates Alpha2-adrenergic and imidazole receptors in the CNS which reduces sympathetic outflow from the vasomotor center in the medulla.
Captopril
- SE
Bradykinin SE include cough & angioedema - ACE normally degrades bradykinin.
- cough is not seen in Losartan
Hydralazine
- Preggo or no Preggo?
- What drug induced Autoimmune DO can this cause?
- Can be used in preggos

- Cause of drug-induced SLE
Pts w/HTN, hypernatremia & hypokalemia
Losartan, an ATII receptor antagonist, is DOC.
- corrects HTN & elecrolyte problem (blocks release of aldosterone, hence sodium is lost in teh urine & potassium retained).
Rx for Pulmonary edema
Loop diuretics to decrease preload.
Urinary retention in prostrate hyperplasia
Selective Alpha1-blocker, relax smooth muscle in bladder neck & prostate.
- examples: Prazosin & Terazosin
MoA of saw palmetto
Anti-androgen effect - blocks androgen uptake & availability w/o altering serum levels.
- causes shrinking of transitiona zone of prostate around urethra
Narcolepsy
Rx w/amphetamines
Premature labor & must deliver baby
Give glucocorticoids to increase surfactant synthesis
Drug used to eliminate Calcium in pt w/hypercalcemia
Loop diuretic
Drug used to remove calcium from urine in a calcium stone former.
Hydrochlorothiazide
Pt w/respiratory alkolosis & then metabolic acidosis:
Salicylate intoxication
S-phase drug used in tx of acute lymphoblastic leukemia:
methotrexate
Analog of hypoxanthine requiring HGPRTase for bioactivation:
6-mercaptopurine... allopurinol could cause toxicity since the drug is a purine.
Drug that competes w/dUMP for thymidylate synthase:
5-fluorocuracil
Drug used in Rx of Wilm's tumor:
actinomycin D (dactinomycin)
Antimetabolite that together w/an antibiotic is used in Rx of acute myelogenous leukemia:
cytarabine + daunomycin (anthracycline antibiotic)
Nephron site responsible for ACE inhibitors causing increase in serum creatinine:
Block in AT II (works as vasoconstrictor of efferent arteriole in glomerulus) by ACE inhibitor removes importatnt control for maintaining intrarenal blood flow causing potential for renal failure (particularly w/bilateral renal artery stenosis)
Nephron site of action of thiazides:
Na/Cl pump in cortical ascending limb.
Vitamin given in Rx of TB.
- Potential risks?
Pyridoxine (B6)- used up when using isoniazid.
- Risk of peripheral neuropathy & sideroblastic anemia.
Drugs that are generally safe in pregnancy
1) methyldopa
2) hydralazine
3) Low dose of propylthiouracil
4) cephalosporins
5) penicillin
Drugs that are not safe:
1) methotrexate
2) ACE inhibitor
3) retinoic acid
4) sulfur containing drugs
Why is gentamicin ineffective in Legionella infections:
- aminoglycosides affect the 30S ribosomal subunits

- resistance to any drugs that are protein synthesis inhibitors may be due to inactivation of the drug by bacterial enzymes.

- decreased binding of drug to 30S ribosomal subunit.