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65 Cards in this Set
- Front
- Back
-Not effective when given orally
-stimulates all adenoreceptors -increases HR and contractibility -relaxes bronchial smooth muscle in asthma and anaphalactic shock -controls metabolism |
Epinephrine
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-Released from sympathetic nerve endings acting on all alpha adenoreceptors and beta 1 adenorecetpors
-injection will increase blood pressure by both vasoconstriction and increased cardiac output |
Norepinephrine
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- is the precursor to the formation of EPI and NE
- agents that block the receptors cause Parkinsons disease - renal blood vessels have non-innervated dopamine receptors that produce vasodilation - at high doses can increase blood pressure and cardiac output |
Dopamine
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-is orally effective
-limited therapeutic justification - chronic toxicity can mimic paranoid schitophrenia |
Amphetamine
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-is orally effective
-limited therapeutic justification - chronic toxicity can mimic paranoid schitophrenia |
Methamphetamines
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-is a mild CNS stimulant that is structurally related to amphetamine
-in large doses it will produce generalized CNS excitation and may cause convulsion -its primary use is in children with attention deficit disorder - has good bioavalibility |
Methylphenidate
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-is the oldest drug known to man
-used in Chinese medicine for over 3000 years -half of its action is due to direct receptor stimulation where it acts on all alpha and beta receptors -half of its action is also indirect in that it releases NE from neural stones - can be used as a treatment for bronchial asthma - is found in some over he counter meds for ear and nasal decongestion - can be used in opthamology to produc eshrt lasting mydriasis, and cyclopesia |
Ephedrine
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-Neo-Synephrine
-orally effective when given in large doses (200-300 times IV dose) so its inclusion in over the counter is questionable -used in opthamology to produce mydrasis -can be used as a nasal spray cause it causes vasoconstriction along with less leakage of fluid - unfortunately can cause worse congestion than nefore once it wears off |
Phenylephrine
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-Main action is the long term stimulation of the CNS alpha 2 receptors
-used to treat high blood pressure -decreases activity of the neurons in the brain involved with pain (so it is used as a pain reliever) -is given for drug withdrawl |
Clonadine
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– is a modification of metaproterenol, but is longer acting
-Has a higher incidence of cardiac side effects -although not FDA approved, used to prevent premature child birth -used to treat bronchial asthma |
Terbutaline
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-treatment of asthma, has same indications as terbutaline, but is longer acting and has fewer side effects
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Albuterol
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-long acting beta 2 adenoreceptor agonist that is commonly used to treat bronchial asthma
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Salmeterol
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-is a synthetic catecholamine analog of dopamine that is a highly selective beta 1 adenoreceptor stimulant (but does not stimulate dopamine receptors
-increases cardiac output without vasoconstriction associate with NE that would result in increased cardiac work -is used for short term treatment for cardiac insufficiency (like in organic heart disease or cardiac surgery) |
Dobutamine
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-classified as a local anesthetic agent that also is a potent inhibitor of NE reuptake
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Cocaine
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-potent inhibitor of catecholamine reuptake into adrenergic nerve ternials
-treats pathological depression |
Tricyclic antidepressants
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-an alpha 1 blocker that will decrease BP
-when BP in decreased the body tries to increase BP by means of the heart, so often this drug is given with beta blockers to decrease HR -does not produce large reflex tachycardia that’s seen with other alpha adrenoreceptors antagonists -useful in treating hypertensive patients -some patients respond with extreme hypotension and loss of consciousness -to avoid “first dose effect”, initially less dose should be slowly administered |
Prazosin
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-this is a prazson like drug wioth longer lasting qualities permitting once a day dose
-often givern to treat prostatic hypertrophy |
Doxazosin
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-this is a prazson like drug with longer lasting qualities permitting once a day dose
-often given to treat prostatic hypertrophy |
Terazosin
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-blocks beta 1 and beta 2 adrenoreceptors, so it is classified as being nonselective
-initailly used to treat cardiac arrhythmias -can be used as an anesthetic (almost as potent as lidocane) -also an effective hypertensive drug -it is unknown how this drug lowers BP |
Propranolol
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-is primarily a beta 1 blocker
-is refered to as cardioselective -reduces plasma renin but has less metabolic and bronchial effects -can be given to patients with renal failure |
Metoprolol
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-is a cardioselective beta 1 blocker
-has a longer half life than metoprolol -produces less CNS side effects than metoprolol -excreted by the kidneys so should not be given to patients with renal problems -can be given to patients with liver failure |
Atenolol
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-is a cardioselective beta blocker with a very short half live when given IV (10 – 15 min)
-short half life is due to rapid hydrolysis by red blood cells -use dfor acute emergency control of ventricular HR in patients with atrial fibrillation or atrial flutter(particularly during inoperative anesthesia) -may be safer to use in and more easily controlled in critically ill patient |
Esmolol
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-introduced for clinical use as a compound having both alpha and beta blocking properties
-is a nonselective beta antagonist and an alpha 1 selective blocker -is an sntihypertensive agent that decreases total peripheral resistance with little reflex effect on the HR or cardiac output |
Labetalol
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-has actions similar to labetalol
-is a free radical scavenger and consquentally may protect the heart form damage -is approved for treating patient with CHF |
Carvedilol
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-must be injected to have an effect
-injectgion causes short term stimulation of all cholinergic recpetors (but will nto enter the brain casue its highly charged) -broken down by cholinesterase -not used as a therapeutic agent |
Acetylcholine
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-only one of the choline esters that has well established clinical use
-is seen in both methacholine and carbachol -is refractory to Achase inactivation -useful in treating post operative urinary retention and atony of the GI tract -has mostly muscarinic stimulating effects |
Bethanechol
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-stimulates all nicotinic receptors in the body
-injection of it stimulates all autonomic ganglia in the bosy (including the adrenal medulla) and stimulation of all skeletal muscle endplates -if you know the predominant tone of the individual autonomic organ, you can predict the response of this drug on both the stimulating and blocking modes |
Nicotine
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-derived from mushrooms
-atropine is the antidote -will stimulate all muscarinic receptors in the body whether innervated or not |
Muscarine
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-originally isolated from a south American shrub
-selectivly activates muscarinic recptors -not highly charged so it will pass the BBB -used ot treat glaucoma -outflow of aqueous humor from the eye is enhanced by due to constriction of the iris sphincter muscle and ciliary body behind the iris -these events widen the angle between the cornea and the iris where aqueous flow takes place |
Pilocarpine
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-derived from Calabar bean
-like acetylcholine it binds to anionic and esteratic sites on enzymes -not highly charges so it can enter rthe CNS -has little activity other than its action to inhibit AChase |
Physostigmine
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-short duration of action as it binds tightly to only one of the enzyme sites
-inhibot AChase only for munites -is valuable in the diagnosis of M.G. -patient may exibit skeletal muscle weakness that could be due to either too much AChase inhibition (cholinergic crisi) or insufficient AChase inhibition (myasthenic crisis) -due to its short action, it is beneficial in the titration of the effective dose levels of longer acting anticholesterase agents |
Edrophonium
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-treats MG
-it is a potent reversible anti-AChase compound -treatmetn of the disease is a long term process and some patient develop tolerance or allergies to specific drugs -other agents may be better tolerated |
Pyridostigmine
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-is a CNS acting anticholinesterase used to treat Alzheimers
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Donepezil
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-common insecticides used in agriculture
-is not an anti-AChase compound but is converted by the liver to the active agent paraxon |
Parathion
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-readily absorbed following oral administration
-derived from plants such as the deadly night shade and has a history as a poison -differs from scopolamine in that it produces the CNS excitation whereas scopolamine is a CNS depressant |
Atropine
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-atropine like alkaloid
-has a shorter duration of action -readily absorbed through the skin -used to prevent motion sickness |
Scopolamine
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-less potent and shorter acting muscarinic antagonist
-more useful for general opthalmological exams than atropine or scopalomine |
Tropocamide
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-synthetic muscarinic antagonist
-has few CNS side effects -applied to the airway by an inhailer -used in patient with COPD -does not reduce volume or increase viscosity in the airway like atropine does |
Ipratropium
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-CNS acting antimuscarinic drug
-used to relieve symptoms of Parkinson’s |
Benztropine
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-atropine like agent
-used to treat spasms of the bladder seen after urologic surgery and in neurological disorders producing bladder hyperactivity -can be administered orally or topically (via catheter) to decrease tone of bladder smooth muscle and thus improving incontinance |
Oxybutynin
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-ganglionic blocking drug
-only used presently as an experimental drug -blocks all autonomic ganglia, but does not compete with Ach at the nicotinic receptors found on the end plate region of the skeletal muscle |
Hexamethonium
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Hemostasis -
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control bleeding by epinephrine on a cotton ball (skin has only alpha receptors
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Nasal decongestion –
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(phenolethine) spray alpha stimulant up the nose
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Local anesthetics -
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can put epinephrine in gums during dental work
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Hypertension-
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(chlonodine or atenolol) to decrease BP and HR
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Hypotension-
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(phenylephrine) to increase BP
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Cardiac stimulation-
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(Dobutamine)
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Bronchodialation-
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(Terbutaline or albuterol) anything that stimulates beta 2 receptors
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Allergic reaction-
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if airway shuts down give EPI by whatever means possible
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Appetite control-
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amphetamine or methamphetamine
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Narcolepsy-
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amphetamine or methamphetamine
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Behavioral disorders-
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amphetamine or methamphetamine
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Urine motility-
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Terbutaline
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Opiod withdrawl-
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clonadine
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Hypertension-
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(propranalol) any beta 1 blocker will work
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Glaucoma-
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Pilocarpine
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Angina
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- (Propranolol, Metoprolol, Atenolol, Esmolol) any beta blocker
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Post infarction prophylaxis-
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Beta blockers forever
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CHF-
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metropolol
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Stage fright-
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propranolol
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Migrane-
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propranolol
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Cardiac arythmian-
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esmolol (cause it only lasts a few minutes, but any beta blocker will do)
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Essential tremor-
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propranolol
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Pheochromocytoma-
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(this is a tumor of the adrenal medulla) to control BP and HR alpha and beta blockers. Also the blood vessels have alpha 1 and alpha 2 receptors so use phenobenzamine
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Benign prostatic hypertrophy-
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(Doxazosin or Terazosin) block beta 1 receptor
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