Autonomics Flashcards
Blocks ACh synthesis(choline acetyltransferase)
Hemicholium
Blocks storge of ACh
Vesamicol
Alter synaptobrevins to prevent release of Ach
Botulinum
Indirect acting cholinomimetics
Neostigmine, carbamates, organophosphates
Direct acting cholinomimetics include:
Betanechol, pilocarpine, nicotine
For bowel and bladder atony
Bethanechol( BBB)
Glaucoma, sjogren syndrome, sicca syndrome
Pilocarpine
Activates M3 receptors in ciliary muscles and salivary glands
Pilocarpine
Xerostomia, xerophthalmia, rheumatoid arthritis
Sjogren syndrome
Activates nicotinic Ach receptors
Nicotine/ varenicline
Used for smoking cessation
Varenecline
Mushroom poisoning
Inocybe and amanita muscaria
Indirect acting cholinomimetics
edrophonium, neostigmine, rivastigmine
Diagnosis of MG(Tensilon Test), cholinergic crisis vs myasthenic crisis
Endrophonium
Managment of MG, oglilvie syndrome, glaucoma
Neostigmine
Muscarinic effects of neostigmine is blocked by this drug
Atropine
Indirect acting cholinomimetic used for alzheimer’s
Rivastigmine
Signs and symptoms of organophosphate poisoning
DUMBBELS- diarrhea, urination, miosis, bronchospasm, bradycardia, excitation, lacrimation, sweating, salivation
Competitively blocks all muscarinic receptors
Atropine
Antidote for organophosphate poisoning, bradycardia, hypersalivation, mydriatic, cyclopegic
Atropine
Binds phophorus of organophosphate, breaks organophosphate bond with cholinesterase
Pralidoxime
Cholinoreceptor blockers
Atropine, benztropine,ipratropium, scopolamine
Competitevely blocks all muscarinic receptors , restores neurotransmittet balance in the basal ganglia
Benzotripine/ biperiden
Cholinergic antagonist used for parkinson’s disease
Benztropine/ parkinson’s disease
Muscarinic antagonists for parkinsonism
Try to park your benz, bip here ( muscarinic antagonist for parkinsonism)
Asthma, copd
Ipratropium
Competitively blocks all muscarinic receptors, antagonizes histamine and serotonin
Scoplamine
Used in motion sickness
Scopolamine
S/sx of atropine toxicity
Hot as a hare, dry as a bone, red as a beet, blind as a bat,mad as a hatter
Ganglion blocker used for hypertension
Hexamethonium
Only depolarizing neuromuscular blocker
Succinylcholine (kapag nakapag deposit ka, success yun)
Inhibits hydroxylation of tyrosine to dopa
Metyrosine
Inhibits vesicular transport of norepinephrine and dopamine
Reserpine
Increases stores of NE and dopamine
MAOI
Inhibits release of NE and dopa
Guanethidine
Promotes release of NE and dopa
Amphetamines and tyramine
Inhibits termination of NE and dopa
Cocoaine and TCAs
Activates a1,b1 and b2
Epi/NE
Sympathomimetics:
Epinephrine, norepinephrine, dopamine
Activates a1,b1, and d1
Dopamine
Dose of dopamine that causes vasodilation in the splanchnic and renal vascular beds
1-5 mcg/kg/min
Dose of dopamine that increases renal blood flow , heart rat, cardiac contractility and b1 receptors
5-15 mcg/kg/min
Vasoconstriction and increased blood pressure
> 15 mcg/kg/min
Non selective activator of B adrenergic receptors used for asthma
Isoprotetenol
Selective alpha1 agonist
Phenlyephrine, pseudoephedrine
Selective alpha2 agonist
Clonidine, methyldopa, apraclonidine
Selective Beta1 agonist
Dobutamine
Selective B2 agonist
Albuterol/salbutamol
Used in preeclampsia
Methyldopa
A2 selective agent in glaucoma
Apraclonidine
Used in cardiac stress testing
Dobutamine
Drug of choice for acute asthma attack
Albuterol/salbutamol
Nonselective alpha blockers:
Phenoxybenzamine, phentolamine
Used for pheochromocytoma
Phenoxybenzamine
Irreversible blocks a adrenergic receptors
Phenoxybenzamine
Reversibly blocks a adrenergic receptors
Phentolamine
Management for a1 agonist overdose and rebound hypertension
Phentolamine
Selective a1 blockers
Prazosin, tamsulosin, terazosin
Selectively blocks a1 adrenergic receptors- used for benign prostatic hyperplasia
Prazosin,tamsulosin
Beta nonselective sympathomimetic
Isoproterenol
Nonselective beta blocker
Propanolol
Selective b blocker(b1)
Atenolol
Blocks b1 and b2 receptors, blocks sympathetic effects on heart and BP, reduces renin releaae
Propanolol
Used for performance anxiety
Propanolol
Drugs with intrinsic sympathomimetic activity
Acebutolol, pindolol
Nonselective beta blocker with the longest half life
Nadolol
Selective b1 blocker
Atenolol
Flow of aqueous humor
Ciliary body, posterior chamber, anterior chamber angle pupil anterior chamber, trabecular meshwork canal of shlemm uveoscleral veins
Increases outflow through canal of schlemm
Latanoprost
Increased outflow via uveosacral veins
Epinephrine
Ciliary muscle contraction, opening of trabecular meshwork, increased outflow
Pilocarpine, physostigmine