Shokry exam 1 Flashcards
Type of anemia seen in piglets if they don’t have access to soil
microcytic anemia
This mineral is necessary for iron absorption
copper
In order for iron to get to bloodstream it must attach to
transferrin
In order for iron to get through the epithelial cell it must attach to
ferritin
Do heavy metals cross the BBB?
NO
Which drug given for microcytic anemia must by given PO?
ferrous
Which is less irritating, organic or inorganic iron?
organic is LESS irritating
Which is less irritating and astringent, ferrous or ferric?
ferrous is LESS irritating and astringent
What is the antidote for an overdose in microcytic anemia drugs?
chelating agent to bind to Fe and make an inactive glob
What drugs are used for microcytic anemia?
Iron carbohydrate complexes (iron dextran), ferrous chloride/phosphate/sulfate, copper sulfate, copper glycinate
What must be given with drugs for microcytic anemia and what is its side effect?
carbohydrate, can cause anaphylactic reaction
What drug is used for macrocytic anemia?
cobalt supplement in horses
What drugs are used for normocytic anemia?
erythropoetin(DOC) and epogen, give iron supplement, anabolic steroids possible but not suggested
What is one major side effect of epogen?
hypersensitivity, hypertension and increased BP
What drugs are used in immune mediated hemolytic anemia?
supportive treatment, blood transfusion, immunosuppressives, IV gamma globulin
What is often used in blood transfusions for animals suffering immune mediated hemolytic anemia?
hemoglobin glutamer - 200 bovine (oxyglobine)
What are the CSF drugs?
filgrastim (G-CSF) and sargramostim (GM-CSF)
Which CSF only stimulates neutrophils?
filgrastin
What is a side effect of using CSFs?
bone pain
How is epinephrine given as a local hemostatic?
topically only
What are the local hemostatic vasoconstrictor drugs?
epinephrine and clot-it-plus
What are the local hemostatic astringent drugs?
tannic acid and ferric chloride
What are the local hemostatic surgical drugs?
oxidized cellulose, gelatin sponge, and collagen
What are the local hemostatic physiological drugs?
thromboplastin, thrombin, fibronogen, and fibrin foam
A soft clot is made out of
fibrin
A hard clot is made out of
cross linked fibrin
Removes the thrombus
plasmin
Side effect of epinephrine and the reason you don’t want to use systemically
tachycardia
Method of action for Clot-it-plus
acts on a1 receptors and ester conformation of benzocaine (makes numb)
Application of astringents is
topical
Method of action for surgical hemostatics
speeds up clotting process by stimulating clotting process
Why do you not use physiological hemostatics systemically?
causes intravascular thrombosis
What are the systemic hemostatic drugs?
blood transfusion, FFF, vit K, protamine sulfate, aminocaproic acid, desmopressin (DDAVP)
What is the other name for vit K1 and where does it come from?
phytonadione from plant origin
What is the other name for Vit K2 and where does it come from?
menaquinone from bacteria in GI tract
What is the other name for vit K3 and where does it come from?
menadione, synthetic - weakest
What is the MOA of vit K?
stimulates formation of factors 2,7,9,10
What is vit K1 an antidote for?
warfarin poisoning but takes 24 hours to act
What is important for Vit K tx to be effective?
a functioning liver
What Vit can you not use in horses?
K3 causes renal failure
Is protamine sulfate acidic or basic?
strongly basic
What is protamine sulfate an antidote for?
heparin to prevent bleeding by chemical antagonism
What are symptoms of overdose in protamine sulfate?
increased bleeding
What are some important uses of aminocaproic acid?
antagonism of the fibrinolytic actions of thrombolytic agents, tx of degenerative myelopathy in german shepherds
What is a clinical use for desmopressin?
control bleeding in dobermans w/ VWD but only lasts 2 hours
What are the anticoagulant drugs?
heparin and warfarin
What is the method of action of heparin?
activates antithromin III resulting in inhibition of factors II, 9, 10, 11, 12
How id heparin administered?
IV or SC ONLY
Does heparin cross the placenta or get excreted in milk?
NO
Is heparin used in vivo or vitro?
BOTH
What is heparin’s safety margin like?
narrow, bleeding is main toxic effect
What is the MOA of warfarin?
inhibition of activation of factor 2,7,9,10 AND competitive antagonist of Vit K by inhibiting Vit K epoxide reductase
How long does it take warfarin to activate?
48hrs, given PO so slow absorption
How much warfarin binds to PP?
99%, loosely bounf to albumin, easily replaced
Does warfarin cross the placenta or get excreted in milk?
YES
Is warfarin used in vivo or in vitro?
in vivo only
Which drugs decrease the response of warfarin?
enzyme inducers like phenobarbitol
What are the thrombocytic agent drugs?
streptokinase, urokinase, tPA, anistreplase
What is the MOA of thrombolytic agents?
activate conversion of plasminogen to plasmin for fibrinolysis
Which thrombolytic agent is most effective?
tPA because it binds specifically to plasminogen bound to fibrin to dissolve a thrombus
What is an antagonist for thrombolytic agents?
aminocaproic acid
What are the anti platelet drugs?
aspirin, dipyridamole, abciximab, lepirudin, clopidogrel
What does low doses of aspirin do?
inhibit synthesis of TXA2 by irreversibly inhibiting cyclooxygenase - antitplatelet
What does high doses of aspirin do?
inhibits PG12 and TXA2 and can form a clot
Which anti platelet drug is used in cats to prevent thromboembolism?
clopidogrel (plavix)
What is the definition of diuretics?
drugs that increase rate of urine flow and rate of Na excretion (not cause urination)
What are the physiological diuretics?
water, sodium chloride
What are the cardiovascular diuretics?
digitalis, phosphodiesterase inhibitors, methylxanthine derivatives (caffeine/threobromine), NB
What are the osmotic diuretics?
mannitol, urea, glycerin/isosorbide
How is mannitol administered?
IV ONLY
What is the MOA of osmotic diuretics?
act on both LOH and PCT
What are osmotic diuretics used for?
cerebral edema, acute glaucoma, acute renal failure - NEVER R CHF or systemic edema
Which diuretics are most effective? Least effective?
most = loop diuretics(aLOH), least = K sparing diuretics (CD & DCT)
What are the loop or high ceiling diuretics?
furosemide (lasix), bumetanide, ethacrynic acid
What are the thiazide diuretics?
hydrochlorothiazide, chlorothiazide
Do loop diuretics work under conditions w/ decreased renal blood flow?
YES
Do thiazide diuretics work under conditions w/ decreased renal blood flow?
NO
Where do thiazide diuretics work?
on DCT - 2nd most effective
How are thiazide diuretics administered?
PO
How are loop diuretics administered?
PO or IV
What is the MOA for loop diuretics?
inhibit Na K2Cl symport on luminal membrane of aLOH inhibits paracellular reabsorption
What is the MOA of thiazide diuretics?
inhibits the NaCl symporter in the DCT to inhibit tubular reabsorption of Na/Cl/K/Mg - also increases reabsorption of Ca
What are loop diuretics used for?
acute pulmonary edema, pulmonary congestion, generalized edema associated w/ CHF,chronic renal failure, and liver cirrhosis
Which diuretics would be used with an isotonic saline for hypercalcemia?
loop diuretics
Which drug is used for exercise induced pulmonary hemorrhage in horses?
furosemide
What are thiazide diuretics used for?
edema of CHF, liver cirrhosis, nephrogenic syndrome, acute glomerular nephritis, hypertension, nephrogenic DI, calcium nephroliathiasis, udder edema
What are some side effects of loop diuretics?
hypokalemia and systemic alkalosis, stimulates renin - angiotensin aldosterone system, hyperglycemia, systemic alkalosis
What are the carbonic anhydrase inhibitor drugs?
acetazolamide, dorzolamide, methazolamide, brinzolamide
What are the potassium sparing diuretics?
spironolactone (aldactone), triamterene, amiloride
Which potassium sparing drug is an aldosterone antagonist?
spironolactone
What is the MOA of carbonic anhydrase inhibitors?
reversible inhibition of carbonic anhydrase, inhibits exchange of H for Na in PCT, lowers IOP
How is acetazolamide administered?
PO
How are dorzolamide and brinzolamide administered?
topically, opthalmic
Which carbonic anhydrase inhibitor is used in udder edema?
acetazolamide
Which carbonic anhydrase inhibitor is used in chronic glaucoma?
dorzolamide
What is the MOA for spironolactone?
competitively blocks aldosterone receptors in DCT and CD causing excretion of Na/Cl and retention of K/H - acidosis
How is spironolactone administered?
given PO,
When is spironolactone contraindicated?
metabolized in liver - don’t use in liver failure
What is spironolactone used for?
as a diuretic but not commonly on its own, not used in emergencies
What is the MOA for triamterene/amiloride?
blocks luminal Na channels of principle cells of late DCT & CD, excretes Na and retains K/H
When is triamterene contraindicated?
metabolized in liver - don’t use in liver failure
When are triamterene and amiloride used?
tx of hypokalemia and hypomagnesia
What is a side effect of carbonic anhydrase inhibitors and potassium sparing diuretics?
systemic acidosis
What is natural ADH (pitressin) used for?
diagnosis of diabetes insipidus - short DOA
What drugs are used to treat nephrogenic diabetes insipidus?
thiazide diuretics
What drugs are used to treat central diabetes insipidus?
vasopressin (ADH), desmopressin (DDAVP), thiazide diuretics, chlorpropamide, restrict nacl intake
What is desmopressin?
synthetic vasopressin (ADH)
What are the B1 agonist drugs?
isoproterenol, epinephrine, norepinephrine, dopamine
Which B1 drug is most potent as a cardiac stimulant?
isoproterenol
Which B1 cardiac stimulant works on all adrenergic receptors?
epinephrine
Which B1 agonist cardiac stimulant is indicated for vasodilation?
isoproterenol
Which B1 agonist cardiac stimulant is the DOC for anaphylaxis?
epinephrine
Which B1 agonist cardiac stimulant is indicated in vasoconstriction and decrease bleeding?
norepinephrine
What is the MOA of dopamine?
increases blood flow to kidneys, vasoconstriction
What is the DOC as a cardiac stimulant when the heart is not contracting? Why?
dopamine (less tachycardias and arrhythmias)
What are two types of non-drug therapy for heart failure patients?
restricted salt diet, restricted exercise
What are the positive ionotropic drugs?
cardiac glycosides = digitalis glycosides (foxglove), digitoxin, digoxin, oaubain catecholamines = dopamine, dobutamine
What is the MOA of cardiac glycosides?
inhibits NaKATPase in myocardial cell membrane increasing Na available to exchange with Ca resulting in increase in intracellular Ca, + ionotropic effect, increases contractility, decreases HR
How are cardiac glycosides administered?
PO
What are the therapeutic uses for cardiac glycosides?
CHF, atrial arrhythmias in dogs
What is the most commonly used cardiac glycoside?
digoxin
What must be done to prevent digoxin toxicity?
monitor blood levels
Which positive ionotropic drugs are used only in emergencies?
dopamine and dobutamine
What effect do cardiac glycosides have at the kidney?
diuretic effect, increased CO = increase in GFR
What are the short term and long term side effects of cardiac glycosides?
acute = hyperkalemia leading to bradycardia chronic = hypokalemia leading to tachycardia
What drug is used to treat cardiac glycoside induced bradyarrhythmias?
atropine
What drug is used to treat cardiac glycoside induced tachyarrhythmias?
potassium IV slow or digoxin immune FAB
What are the indicator drugs?
pimobendan, inamrinone, milrinone
What is the classification for inodilators?
+ ionotropes and vasodilators at both veins and arteries
What is the MOA of inodilators?
sensitization of cardiac contractile apparatus to Ca by enhancing interaction of Ca and troponin C
What are inodilators used for?
tx of CHF in dogs, or dilated cardiomyopathy
When are inodilators contraindicated?
hypertrophic cardiomyopathy
What are the ACE inhibitor drugs?
captopril, lisinopril, benazepril, enalapril
Which ACE inhibitor is excreted in bile?
benazepril
What is the MOA for ACE inhibitors?
inhibits angiotension converting enzyme preventing conversion of AT1->AT2 which is needed for aldosterone, vasodilator so heart is less stressed
What is the DOC of ACE inhibitors?
enalapril
What are the beta blocker drugs?
carvedilol, metoprolol, atenolol
What is the MOA of beta blockers?
decrease contractility of heart so doesn’t pump as hard, nonselective B blocker and A1 blocker, inhibits endothelia release
What are beta blockers used for?
mild CHF, blocks harmful SNS can use in hypertrophic cardiomyopathy
Class 1A
prolongs AP- sodium channel blocker
Class 1B
shortens AP- sodium channel blocker
Class 2
B blocker
Class 3
K channel blocker
Class 4
Ca channel blocker
What drugs are in class 1A?
quinidine, procainamide, disopyramide
What is the DOC for atrial fibrillation in horses?
quinidine - also in cattle and lg breed dogs
Which 1A drug is more effective for ventricular arrhythmias?
procainamide
What drugs are in class 1B?
lidocaine, phenytoin, mexiletine, aprinidine
How is mexiletine administered?
PO
What is the IV DOC for ventricular arrhythmias in dogs?
lidocaine
What class 1B drug is used to treat digitalis-induced arrhythmias?
lidocaine and phenytoin
What class 1B drug is used in supra ventricular and ventricular arrhythmias?
phenytoin
What effect do class 1C drugs have on the action potential?
none
What is the DOC for hypertension and tachycardia in cats with hyperthyroidism?
beta blockers
When is propranolol contraindicated?
asthma patients
How is timolol applied?
topical to eye only
Which drugs are used to treat refractory ventricular tachycardia?
potassium channel blockers
Why are potassium channel blockers not commonly used?
narrow safety margin, can cause bradycardia
Which potassium channel blocker is a non-selective beta blocker?
sotalol
What are Ca channel blockers used to treat?
supraventriclar tachycardia and myocardial hypertrophy
Which class 4 drug is used to treat hypertrophic cardiomyopathy?
diltiazem
Which drugs are used to treat bradyarrhythmias in cats?
atropine, isoproterenol, epinephrine
Which drugs are nonselective alpha agonists?
epinephrine and norepinephrine
Which drugs are selective alpha 1 agonists?
phenylephrine
Which drugs are direct and indirect sympathomimetics?
sphedrin, pseudoephedrine, phenylpropanolamine
Which vasodilator would you use for emergency hypertension in a blocked cat to relax smooth muscle?
phenoxybenzamine
Which drug is good to manage hypertension in asthmatic animals?
atenolol
What drug is used for diabetic animals to lower BG levels with B1 blockers?
atenolol
Which ACE inhibitor is the DOC as a vasodilator due to its longer duration?
enalapril
Which ACE inhibitor is best for renal patients as a vasodilator?
benazepril
Which ACE inhibitor has the most side effects as a vasodilator?
captopril
How do ACE inhibitors affect glomerular pressure?
lower intraglomerular pressure decreasing GFR
How do ACE inhibitors effect bradykinin?
increases bradykinin
Serum levels of what must be monitored when using ACE inhibitors?
serum potassium - can cause cardiac depression
Which drug is an angiotension II antagonist?
Losartan
What is Losarten used for?
antihypertensive
What drugs are direct acting vasodilators?
hydralazine, nitrates, sodium nitroprusside, nitroglycerin, isosorbide dinitrate
Which direct acting vasodilator only works on the arteries NOT the veins?
hydralazine
What is the MOA of hydralazine?
inhibits Ca into smooth muscle of arteries to make them dilate
Which direct acting vasodilator is given IV for emergency hypertension?
sodium nitroprusside
What is the MOA for direct acting vasodilator nitrates?
formation of radical nitric oxide
What drugs are used to treat angina?
direct acting vasodilators - nitrates
Which direct acting vasodilator is NOT given PO?
nitroglycerin - 1st pass metabolism
What are the Ca channel blockers?
verapamil, diltiazem, nifedipine, amlodipine
What are Ca channel blockers (diphenyl alkylamines) used for?
supraventricular tachyarrhythmias
What are benzodiazepines used for?
coronary vasodilation, increases nutrient to heart
How do diuretics act as an antihypertensive drug?
help risk of heart edema
How do beta blockers act as antihypertensive drugs?
slow rate and contraction
What is the DOC for pheochromocytoma induced hypertension?
phenoxybenzamine
In what type of shock do you see mental dullness?
ALL types of shock
What are the main factors in effectively treating shock?
time and cause
What is the goal of early treatment of shock?
effective tissue perfusion and oxygenation
Which vasopressor is best to use in correcting hypotension during hypovolemic shock?
phenylephrine (less tachycardia than NE and Epi)
What precaution do you need to take when using phenylephrine?
reflex bradycardia
What can be FATAL when used in systolic and diastolic shock and in hyperemic shock caused by lung injury?
aggressive fluid therapy = pulmonary edema
What is used for shock in lung injury?
diuretics to get rid of sodium and water
When are glucocorticoids used in shock?
only anaphylactic shock but NOT DOC
Which electrolyte is the main extracellular cation?
Na
Which electrolytes are the main extracellular anions?
Cl and HCO3
Which electrolyte is the main intracellular cation?
K
Which electrolyte is the main intracellular anion?
P04
Water moves across capillary membranes from ___ osmotic pressure to ___ osmotic pressure
LOW –> HIGH
Which type of fluids replaces the extracellular volume?
replacement crystalloids
Which type of fluids replaces the intracellular volume?
maintenance crystalloids
Which type of fluids are contraindicated in dehydration?
hypertonic solutions
What type of fluids are the DOC for cerebral edema?
hypertonic solutions
What is the fluid of choice for hemorrhagic hypovolemic shock?
blood
What MUST you do before giving an animal fluids?
make sure they can urinate
What is the rate of administration of fluids in severe shock?
large = 40-60mL/kg/hr
cat 5-10mL/kg/hr
What is the rate of maintenance fluids?
65mL/kg/24hr for mature animals
130mL for immature animals
What is the MOA for dopamine in shock?
increased blood flow to the kidneys, vasodilation increases tissue perfusion at low doses - vasoconstriction at high doses to resolve diastolic cardiogenic shock
What is the DOC for vasodilatory shock?
dopamine
What is the DOC for treatment of sinus bradycardia?
atropine
What are some side effects of atropine?
cyclopegia in horses, sticky saliva in ruminantes, hypersalivation in cats
What are some benefits of glycopyrrolate?
doesn’t cross BBB, causes less tachycardia than atropine
Which drug is an opioid antagonist?
naloxone
What is naloxone used for?
reversal of opioid induced respiratory or CNS depression or reversal of hypovolemic shock
Which drug would you use if you gave too much apomorphine?
naloxone
What is the MOA of NSAIDS?
inhibit prostaglandins via inhibition of COX enzymes
What do you use NSAIDS for?
anaphylactic shock to decrease inflammation
What is the DOC for acute systemic anaphylactic shock?
epinephrine
When is epinephrine contraindicated?
hypovolemic hemorrhagic shock - has a vasodilatory effect at skeletal muscle
When do you use dopamine at a HIGH dose?
diastolic shock treatment
When do you use dopamine at a LOW dose?
systolic shock treatment
What is the DOC for vasodilatory shock?
dopamine at high doses
What are the appetite stimulants?
NE, dopamine, GABA, endorphins, pancreatic polypeptides, palatable food
What are the inhibitors of appetite?
serotonin, calcitonin, cholecystokinin (CCK), CRH
What is the other name for diazepam and how is it administered?
valium, IV
What is oxazepam and how is it administered?
metabolite of diazepam, given PO
What is the MOA of diazepam?
stimulates GABA receptors and inhibits satiety center
What species are diazepam and oxazepam more effective in?
cats
What is the MOA of cyproheptadine?
inhibits satiety center by blocking serotonin receptors and H1
What species is cyproheptadine more effective in?
cats and humans NOT dogs
What precaution should be taken when FF hydrogen peroxide as an emetic?
aspiration pneumonia
What species is syrup of ipecac toxic in?
cats
What is the MOA of apomorphine?
stimulates dopamine receptors indirectly stimulating CRTZ and directly stimulating the emetic center
What is apomorphine used for at large doses?
analgesic at opioid receptors
What species is apomorphine used in?
dogs, not cats
How is apomorphine administered?
all routes, even crushed pill into eye
What is the most effective emetic?
apomorphine
What does overdose of apomorphine cause? How do you treat it?
respiratory depression, treat with naloxone
What is the MOA of xylazine?
alpha 2 agonist sedative side effect to induce vomiting
How is xylazine administered? In what species?
IM or IV in cats
What is the MOA of antihistamines?
inhibits the vestibular apparatus to treat motion sickness
What is the MOA of antimuscarinics?
block muscarinic receptors to treat motion sickness
What is the MOA of neurokinin antagonists?
blocks neurokinin 1 receptors preventing substance P from binding to stop motion sickness and vomiting from anticancer drugs, and viruses
What species is maropitant citrate used in?
ONLY in dogs
What is the MOA of phenothiazine derivatives and butyrophenone derivatives?
block dopamine receptors and inhibit CRTZ and emetic center for NON motion sickness vomiting - broad spectrum
What is the MOA of serotonin inhibitors?
serotonin antagonist to prevent chemotherapy vomiting, antagonize apomorphine induced emesis, and a prokinetic to increase intestinal motility
When do you not want to use serotonin inhibitors?
with a foreign body
What is the MOA of mirtazapine?
antagonist of 5HT 2 and 3
What is mirtazapine used for?
antidepressant and antiemetic
What is the MOA of pro kinetics?
stimulate GI tract motility
What are anti ulcer drugs used for in dogs and cats?
tx of helicobacter infection
What is the function of cytoprotective drugs?
protect mucosa
What is an example of systemic antacids?
sodium bicarbonate (tums)
What is the DOA for systemic antacids?
short
What is the MOA for systemic antacids?
causes rebound effects due to liberation of carbon dioxide and gastric distention (neutralize and burp up)
How do non-systemic antacids work?
act locally in stomach, bind to food and chemically neutralize HCl
What are some examples of non-systemic antacids?
aluminum, magnesium and calcium salts
What are the adsorbent drugs?
aluminum hydroxide, aluminum salts, calcium carbonate
What is misoprostol used for?
treat NSAID induced gastric ulcers
What is the MOA of misoprosterol?
increases mucous and sodium bicarb secretion to heal ulcers
What are some side effects of misoprosterol?
stimulates uterine contraction, diarrhea
What is the MOA of sucralfate?
binds to ulcer site and protects it against acid, pepsin and bile
What is sucralfate used for?
treatment and prevention of GI ulceration and NSAID induced ulcers
What is the MOA for anticholinergics?
reduce food induced gastric secretion
What does pirenzepine act on?
M1 antagonist
What are the H2 receptor antagonists?
cimetidine, ranitidine, famotidine, nizatidine
What is the MOA of H2 receptor antagonists?
competitively block parietal cells in stomach to inhibit gastric acid and pepsin secretions
What are the most effective anti-ulcer drugs?
proton pump inhibitors
What is the MOA of proton pump inhibitors?
irreversibly inhibit H, K, ATPase proton pump which inhibits HCl production
What are the proton pump inhibitor drugs?
omeprazole, lansoprazole
What precaution must be taken with omeprazole?
enzyme inhibitor - watch drug-drug interactions
What is the MOA of metaclopramide?
central and peripheral dopamine antagonist, serotonin antagonist
What is metoclopramide used for?
increase gastric motility and peristalsis in duodenum/jejunum, increase gastric emptying, decrease intestinal transit, potent antiemetic
What are some side effects of metoclopramide?
behavior side effects, crosses BBB
What is the MOA of domperidone?
central and peripheral D antagonist -NO cholinergic activity
What is one benefit of domperidone compared to metoclopramide?
less behavior side effects, does not cross BBB
What is the MOA of cisapride?
acts as serotonin 4 agonist in enteric neurons
What is cisapride used for?
pro kinetic effect on entire GI tract and colon in horses - doesn’t stimulate secretion
What is a side effect of erythromycin?
induces diarrhea from increased motility
What is a use for lidocaine?
prokinetic for tx of colic
What is the MOA of tertiary compounds and quaternary?
non selectively blocks all muscarinic receptors in GI tract
What are uses of tertiary compounds and quaternary?
inhibits motility and secretion, used as antispasmodic in colic tx
Which tertiary compound is NOT recommended for diarrhea?
atropine, glycopyrolate, aminopentamide
Which tertiary compound is contraindicated in horses?
atropine
What is the DOC for diarrhea?
loperamide (imodium)
What is the MOA of loperamide?
inhibits propulsive motility, increases segmental motility (won’t puch foraward, mixes)
Why is loperamide the DOC?
doesn’t cross BBB, faster onset, longer duration
When is loperamide contraindicated?
diarrhea caused by bacterial infections
Which drug is a very effective adsorbent?
activated charcoal
What species is bismuth subsalicylate (pep to-bismol) toxic to?
cats
What is the MOA of cholestyramines?
binds to bile acids and end toxins, decreases absorption of fat and fat soluble compounds
What is the DOC for inflammatory bowel disease?
sulfasalazine
What is the MOA of sulfasalazine?
inhibit intestinal secretion
What is decussate sodium used for?
bloat in ruminants
What is associated with chronic use of mineral oil?
granulomatous lesions
What type of enemas should not be used on cats?
phosphate containing enemas
What is the MOA of cholinergic drugs?
cause contraction of GB
What oral drugs can be given to close the esophageal groove?
copper sulfate or sodium bicarbonate
What can be given in cases of rumen bloat?
surfactants, poloxalene, docusate sodium, vegetable oil
What is the MOA for drugs that stop rumen bloat?
decrease surface tension causing release of gas from rumen fluid
What are the cholinergics given for rumen atony?
bethanechol, neostigmine
What are the bitters given for rumen atony?
ginger, capsicum, methyl salicylate
How do you treat urea poisoning?
acetic acid or vinegar 5% followed by a large amount of cold water
What is used to treat bovine ketosis?
glucose 50% IV bolus, parenteral glucocorticoids
What is used to prevent ketosis?
oral propylene glycol or ammonium lactate, or sodium proproinate + rations producing a high level of propionate acid
What is the parenteral calcium treatment for hypocalcemia?
calcium gluconate or borogluconate solution IV slowly, IM or SQ then added to saline infusion
What is dihydrotachysterol (DHT) used for?
vitamin D analog to stimulate absorption of Ca and decrease its excretion in hypocalcemia
What are the treatments for hypercalcemia?
normal saline, furosemide, glucocorticoids, calcitonin, pamidronate disodium, plicamycin, sodium bicarbonate IV
What is the DOC to treat hypothyroidism?
levothyroxine (T4)
What is the MOA of levothyroxine?
T4 metabolized to T3 and allows for intracellular auto regulation
Which is more potent, T4 or T3?
T3 is 2x more potent than T4, may cause thyroxicosis
When is lithyronine used instead of levothyroxine?
dogs with intestinal malabsorption or animals treated with glucocorticosteroids
What drugs decrease serum T4 and T3?
glucocorticoids, sulfonamides, anticonvulsants, phenylbutazone, salicylates, quinidine, mitotane, general anesthetics
What is the DOC to treat toxicosis from hypothyroid drugs?
beta blockers for tachycardia - also withdraw treatments and activated charcoal of accidental ingestion
What is myxyedema coma in dogs?
hypothyroid dogs whose levels dropped too low
What drug us used to treat myxyedema coma in dogs?
L-thyroxine sodium IV or SQ
What are the antithyroid agents?
thioureylens, methimazole, propylthiouracil
What is the DOC for hyperthyroid?
methimazole
What is the MOA of antithyroid agents?
inhibit synthesis of thyroid hormones by inhibiting organification and coupling which lowers T4 levels
Why is methimazole the DOC for hyperthyroid?
it doesn’t cause immune mediated events
What drug is used to reduce the size of the thyroid gland before surgery?
iodide
What are the antithyroid (goitrogenic) plants?
brassica (cabbage & turnips have goitrin)
broccoli and rapeseed have thiocyanate
What is the treatment of choice for cats with hyperthyroid?
radioactive iodine
Which steroids does the cortex produce?
mineralocorticoids, glucocorticoids, sexual steroids
Which steroids does the medulla produce?
catecholamines
Which glucocorticoids have a short DOA?
hydrocortisone, methylprednisolone, prednisolone, prednisone
Which glucocorticoids have a medium duration of action?
triacinolone
Which glucocorticoids have a long DOA?
betamethasone, dexmethazone
How do glucocorticoids effect insulin?
antagonist to insulin -> increases gluconeogenesis, enhances lipolysis, increases protein catabolism
How do glucocorticoids effect water and electrolytes?
increase GFR, make them PU/PD, decreases Ca
What factors of glucocorticoids determine their DOA?
the base compound and the excipient
What are the two types of base compounds and their factors?
salt (water soluble, IV or IM) esters (insoluble, SQ IM)
Are glucocorticoids bound to plasma proteins?
yes, highly bound
What is hCG used for in large animals?
follicular cysts in cows, induce ovulation in mares, stimulate testosterone secretion
What is hCG used for in small animals?
follicular cysts in dogs, induce ovulation in cats, cryptorchism in cats
How do glucocorticoids effect the blood?
see a stress leukogram with decrease in cortisol and T3 and T4
How to glucocorticoids effect the skin?
calcification and thinning/weakening of skin
What do glucocorticoids do to the appetite?
increase appetite
What do glucocorticoids do to repro?
inhibit sperm/ovulation, teratogenic, induce abortion
What do glucocorticoids do at the GI tract?
cause ulceration by increased gastric secretion but no mucous secretion
What do glucocorticoids do at the hepatic system?
increase fat absorption, liver enzymes, lead to pancreatitis
What makes a glucocorticoid rapidly hydrolyze and release its base?
plasma and synovial fluid
When are glucocorticoids contraindicated?
immunosuppression, DM, growth, pregnancy
What are some drug interactions with glucocorticoids?
cause microsomal enzyme inductions, NSAIDS increase gastric ulcer potential, potentiate other drugs to induce seizures
What are some side effects of short term glucocorticoids?
abortion, gastric ulcers, laminitis, fetal abnormalities
What species are less sensitive to glucocorticoids and need a higher dose?
birds and cats
Why should glucocorticoids be tapered?
so body can start making its own cortisol
What drugs are used in Addisons disease?
fludrocortisone, desoxycorticosterone pivalate
What is the DOC during an addisonian crisis?
dexamethasone - won’t alter ACTH stim
What is the DOC for Addison’s tx?
desoxycorticosterone pivalate (DOCP)
What electrolytes should be monitored while on treatment for Addison’s?
Na and K levels
What drugs are used for hyperadrenocorticism?
mitotante, trilostane, ketoconazole, seleginine, pergolide
What is the MOA of mitotante?
cytotoxic effect on zone fasiculata and reticularis
How is militant administered?
PO in oily food to increase bioavailability
What is the MOA of trilostane?
competitive inhibitor of steroid synthesis
What species does ketoconazole act on as a tx for hyperA?
dogs
What is the MOA of ketoconazole as a tx for hyperA?
inhibits CYP450 enzyme - reduction in cholesterol and cortisol synthesis
What type of hyperA does seleginine treat?
pituitary dependant in dogs
What is the MOA of hyperA?
inhibits MAO-B, increases dopamine, decreases ACTH, decreases cortisol
What does pergolide treat?
pituitary pars intermedia dysfunction in horses
What is the MOA of pergolide?
dopamine agonist, decrease ACTH, decrease cortisol
What are the gonadotropins?
hCG, LH, FSH, eCG, PMSG
What drug is used for follicular cysts in cattle and dogs?
hCG or GnRH
What drug is used to induce ovulation in mares and cats?
hCG
What drug is used to stimulate testosterone secretion to check for a testicle OR for cryptorchids?
hCG
Which drug is used to induce ovulation in mares via ovuplant?
deslorelin acetate
What are testosterone esters used for in large animals?
teaser to ID cow in estrus, growth promoters
What are testosterone esters used for in small animals?
suppress estrus, pseudopregnancy
What are anabolic steroids used for in animals?
appetite stimulant but NOT growth promotion
What is zeranol used for in large animals?
growth promotion of cattle and sheep
What is estradiol vale rate used for in large animals?
estrus synchronization
What are estrogens used for in small animals?
prostate hypertrophy, can be used for misstating but not recommended
What are some side effects of using estrogen?
feminization, pyometra, bone marrow suppression
What are the progestins and what species are they for?
megesterol acetate (btches) melengesterol acetate (cattle) hydroxyprogesterone caproate (cat) altrenogest (mare)
What are progesterones used for in large animals?
synchronization, growth promoters, premature labor
What are progesterones used for in small animals?
contraception and suppression of estrus NOT mismating
What drugs are used for behavioral problems and urination of male cats?
hydroxyprogesterone caproate, medroxyprogesterone acetate
What are some adverse effects of progesterone?
pyometra, decreased cortisol levels, delay partition, masculinization of female fetuses
What is the DOC for abortion in cattle?
prostaglandins
What are prostaglandins used for in lg animals?
abortion, destory CL to get same cycle
What are prostaglandins used for in small animals?
uterine infections, mismatching
What drug can be used to offset side effects of prostaglandins?
atropine
What is the DOC for increasing milk production in large animals?
somatotropin, GH
What are some adverse effects of somatotropin?
mastitis, hyperglycemia
What is the DOC for mare and dog partition?
oxytocin
What are the uterine stimulant drugs?
estrogen and oxytocin
What is the DOC for partition in cattle?
glucocorticoids
What do tocolytics do?
inhibit uterine or oxytocin induced myometrial uterine contractions
What receptors do affect in treating agalactica?
dopamine antagonists
What are prolactin inhibitors used for?
mismatching, pseudopregnancy
Which prolactin inhibitor is more effective?
cabergoline
What drugs are used for benign prostrate hypertrophy in dogs?
megestrol acetate, finasteride, GnRH antagonists and agonists at high dose, castration
Which dopamine agonists can be used in pseudopregnancy due to prolactin inhibition?
bromocriptine and cabergoline
What is the DOC to expel placenta in cattle?
PGF2A
What is the DOC for abortion in cattle at first 150 days?
PGF2a + dexmethazone
What is the DOC for abortion in cattle at 5-8 months?
PGF2a + dexmethazone
What is the DOC for abortion in cattle in last month of pregnancy?
demethazone OR PGF2a ALONE