Part 2 Pharm 1-Liners Flashcards
Treatment of withdrawal syndrome involves
Long-acting sedative-hypnotic or a gradual reduction of dose; clonidine or propranolol
These agents are CNS depressants
Ethanol; Barbiturates; and Benzodiazepines
Withdrawal from this drug causes lethargy; irritability; and headache
Caffeine
W/D from this drug causes anxiety and mental discomfort
Nicotine
Treatments available for nicotine addiction
Patches; gum; nasal spray; psychotherapy; and bupropion
Chronic high dose abuse of nicotine leads to
Psychotic state; overdose causes agitation; restlessness; tachycardia; hyperthermia; hyperreflexia; and seizures
Tolerance is marked and abstinence syndrome occurs
Amphetamines
Amphetamine agents
Dextroamphetamines and methamphetamine
These agents are congeners of Amphetamine
DOM; STP; MDA; and MDMA “ecstasy”
Overdoses of this agent with powerful vasoconstrictive action may result in fatalities from arrhythmias; seizures; respiratory depression; or severe HTN (MI and stroke)
Cocaine “super-speed”
Most dangerous of the currently popular hallucinogenic drugs; OD leads to nystagmus; marked hypertension; and seizures; presence of both horizontal and vertical nystagmus is pathognomonic
PCP
Removal of PCP may be aided
Urinary acidification and activated charcoal or continual nasogastric suction
THC is active ingredient; SE’s include impairment of judgment; and reflexes; decreases in blood pressure and psychomotor performance occur
Marijuana
This agent has greater affinity for muscarinic receptors and used for postoperative and neurogenic ileus and urinary retention
Bethanechol
Muscarinic that is very lipid soluble and used in glaucoma
Pilocarpine
Muscarinic used to treat dry mouth in Sjrogren’s syndrome
Pilocarpine or Cevimeline
Indirect-Acting ACh Agonist; alcohol; short DOA and used in diagnosis of myasthenia gravis
Edrophonium
Carbamate with intermediate action and used as off-label for postoperative paralytic ileus and urinary retention
Neostigmine
Treatment of atropine overdose and glaucoma (because lipid soluable); Enters the CNS rapidly and has a stimulant effect; which may lead to convulsions
Physostigmine
Treatment of myasthenia gravis and sometimes used prophylactically for organophosphate poisoning in chemical warfare
Pyridostigmine
Antiglaucoma organophosphate; indicated but not used much clinically anymore due to long duration of action
Echothiophate
Insecticide organophosphate
Malathion; parathion
Toxicity of cholinergics
DUMBELSS (diarrhea; urination; miosis; bronchoconstriction; excitation of skeletal muscle and CNS; lacrimation; salivation; and sweating)
The most important cause of acute deaths in cholinesterase inhibitor toxicity
Respiratory failure
Treatment of muscarinic symptoms in organophosphate overdose
Atropine
This agent competes for phosphorylated cholinesterase enzyme and regenerates enzyme if organophosphate-enzymes complex has not “aged”
Pralidoxime
Prototypical drug is atropine
Nonselective Muscarinic Antagonists
Treat manifestations of Parkinson’s disease and EPS
Benztropine; trihexyphenidyl
Treatment of motion sickness
Scopolamine
Produce mydriasis and cycloplegia
Atropine and other anti-muscarinic agents
Bronchodilation in asthma and COPD
Ipratropium; tiotropium
Reduce transient hyper GI motility
Dicyclomine; methscopolamine
Cystitis; postoperative bladder spasms; or incontinence
Oxybutynin; dicyclomine
Toxicity of anticholinergics
Anti-DUMBBELSS
Another pneumonic for anticholinergic toxicity
“dry as a bone; red as a beet; mad as a hatter; hot as a hare; blind as a bat”
Atropine fever is the most dangerous effect and can be lethal in this population group
Infants
Contraindications to use of atropine
Infants; closed angle glaucoma; prostatic hypertrophy
Ganglion blockers that were indicated (but not anymore) for severe hypertension
Hexamethonium; trimethaphan
Reversal of blockade by neuromuscular blockers
Cholinesterase inhibitors
Tubocurarine is the prototype; pancuronium; atracurium; vecuronium are newer short acting agent; produce competitive block at end plate nicotinic receptor; causing flaccid paralysis
Nondepolarizing Neuromuscular Blockers
Only member of depolarizing neuromuscular blocker; causes fasciculation during induction and muscle pain after use
Succinylcholine
Pneumonic for beta receptors
You have 1 heart (Beta 1) and 2 lungs (Beta 2)
This is the drug of choice for anaphylactic shock
Epinephrine
Phenylisopropylamines that are used legitimately and abused for narcolepsy; attention deficit disorder; and weight reduction
Amphetamines
Alpha agonist used to produce mydriasis and reduce conjunctival itching and congestion caused by irritation or allergy; it does not cause cycloplegia
Phenylephrine
Epinephrine and dipivefrin are used for
Glaucoma
Newer alpha 2 agonist (apraclonidine and brimonidine) treat glaucoma
Reduce aqueous synthesis
Short acting Beta 2 agonists that is drug of choice in treatment of acute asthma but not recommended for prophylaxis
Albuterol
Longer acting Beta 2 agonists is recommended for prophylaxis of asthma
Salmeterol
These agents increase blood flow and may be beneficial in treatment of acute heart failure and some types of shock
Beta1 agonists
These agents decrease blood flow or increase blood pressure; are local decongestant; and used in therapy of spinal shock (temporary maintenance of blood pressure which may help maintain perfusion)
Alpha1 agonists
Shock due to septicemia or myocardial infarction is made worse by
Increasing afterload and tissue perfusion declines
Often mixed with local anesthetic to
Reduce the loss from area of injection
Chronic orthostatic hypotension can be treated with
Midodrine
Beta 2 agonist used to suppress premature labor; but cardiac stimulatory effects may be hazardous to mother and fetus
Terbutaline
Long acting sympathomimetic; sometimes used to improve urinary continence in children and elderly with enuresis
Ephedrine
Alpha 1 agonist toxicity
Hypertension
Beta 1 agonist toxicity
Sinus tachycardia and serious arrhythmias
Beta 2 agonist toxicity
Skeletal muscle tremor
The selective agents lose their selectivity at
high doses
Nonselective alpha-blocking drug; long acting and irreversible; and used to treat pheochromocytoma; Blocks 5-HT; so occasionaly used for carcinoid tumor; Blocks H1 and used in mastocytosis
Phenoxybenzamine
Nonselective alpha-blocking drug; short acting and reversible; used for rebound HTN from rapid clonidine withdrawal; and Raynaud’s phenomena
Phentolamine
Selective Alpha 1 blocker used for hypertension; BPH; may cause first dose orthostatic hypotension
Prazosin; terazosin; doxazosin
Selective Alpha 2 blocker used for impotence (controversial effectiveness)
Yohimbine
Selective B1 Receptor blockers that may be useful in treating cardiac conditions in patients with asthma
Acebutolol; atenolol; esmolol; metoprolol
Combined alpha and beta blocking agents that may have application in treatment of CHF
Labetalol and carvedilol
Beta blockers partial agonist activity (intrinsic sympathomimetic activity) cause some bronchodilation and may have an advantage in treating patients with asthma
Pindolol and acebutolol
This beta blocker lacks local anesthetic activity (decreases protective reflexes and increases the risk of corneal ulceration) and used in treating glaucoma
Timolol
This parenteral beta blocker is a short acting
Esmolol
This beta blocker is the longest acting
Nadolol
These beta blockers are less lipid soluble
Acebutolol and atenolol
This beta blocker is highly lipid soluble and may account for side effects such as nightmares
Propranolol
Clinical uses of these agents include treatment of HTN; angina; arrhythmias; and chronic CHF
Beta blockers
Toxicity of these agents include bradycardia; AV blockade; exacerbation of acute CHF; signs of hypoglycemia may be masked (tachycardia; tremor; and anxiety)
Beta blockers
Cholinomimetics that increase outflow; open trabecular meshwork; and cause ciliary muscle contraction
Pilocarpine; carbachol; physostigmine
Nonselective alpha agonists that decrease aqueous production and increase aqueous outflow
Epinephrine; dipivefrin
Selective alpha agonists that decreases aqueous secretion
Apraclonidine; brimonidine
These Beta blockers decrease aqueous secretion
Timolol (nonselective); betaxolol (selective)
This diuretic decreases aqueous secretion due to lack of HCO3- ion; Causes drowsiness and paresthesias; alkalinization of the urine may precipitate calcium salts; hypokalemia; acidosis
Acetazolamide
This agent cause increased aqueous outflow
Prostaglandin PGF2a (latanoprost; travoprost; unoprostone)
Inhibit angiotensin-converting enzyme (ACE)
ACE inhibitors
Captopril and enalapril (-OPRIL ending) are
ACE inhibitors
SE of ACE inhibitors
Dry cough; hyperkalemia
ACE inhibitors are contraindicated in
pregnancy and with hyperkalemia
Losartan and valsartan block
AT1 receptors
Side effect associated with ACEI but not ARBs
Dry cough
Block L-type calcium channel
Calcium channel blockers
CCB with predominate effect on arteriole dilation
Nifedipine
SE of CCB
Constipation; edema; and headache
Reduce heart rate; contractility; and O2 demand
Beta-blockers
Cardioselective Beta 1-blockers
Atenolol; acebutolol; and metoprolol
Beta-blockers should be used cautiously in
Asthma (bronchospastic effects); diabetes (block signs of hypoglycemia) and peripheral vascular disease
Non-selective Beta-blocker also used for migraine prophylaxis
Propranolol
SE of beta blockers
Bradycardia; SEXUAL DYSFUNCTION; decrease in HDL; and increase in Triglycerols (TG)
Alpha 1selective blockers
Prazosin; terazosin and doxazosin (-AZOSIN ending)
Non-selective Alpha1blockers use to treat pheochromocytoma
Phenoxybenzamine
For rebound HTN from rapid clonidine withdrawal
Phentolamine
A1a-selective blocker used for BPH
Tamsulosin (Flomax)
SE of alpha blockers
Orthostatic hypotension (especially with first dose) and reflex tachycardia
Presynaptic Alpha 2 agonist used in HTN
Clonidine; and methyldopa
SE of methyldopa
Positive Comb’s test; depression
Methyldopa is contraindicated in
Geriatrics due to its CNS (depression) effects
SE of clonidine
Rebound HTN; sedation; dry mouth
Direct vasodilator of arteriolar smooth muscle
Hydralazine