pharma 1 Flashcards
(133 cards)
Potentiation
one drug ↑ effect of another. e.g. Diazepam + analgesic at a lower dose Clonidine + alcohol = inhibition of CNS Neuroleptanalgesia (fentanyl + droperidol)
Idiosyncrasy
hereditary enzymopathy
unpredictable effect. e.g. G6PD-deficiency – hemolytic anemia
Acquired tolerance
↓ in effect after days/weeks of treatment e.g. Bisacodyl ,Promedol
tachyphylaxis
rapid decrease in drug effect / activity after repetitive use of a drug. e.g. morphinism
indirect-acting adrenergic agonist to treat rhinitis
material accumulation
accumulation fo substance. eg. digoxin
indirect functional antagonism
opposite effect of 2 drugs having different mechanism of action e.g. Proserin (stimulates skeletal muscles) + halothane (relaxes skeletal muscles, reduces proserin effect)
direct antagonism
both drugs bind to the same receptor e.g. Proserin + atropine
teratogenic effect
harmful effect on fetus during pregnancy e.g. Paracetamol / Sodium valproate / Doxycycline / Ciprofloxacine
glucose 6- phosphate dehydrogenase deficiency
hemolytic anemia e.g. Aspirin / Sulfonamides / Quinine (chingamin) / Primaquine
induction of microsomal enzymes P450
PHENOBARBITAL
Withdrawal /
Abstinence syndrome
when patient stopstaking a drug suddenly prednisolone, b-blockers
Proserine
Cholinomimetics (Cholinergicagonists)
cholinesterase inhibitor/ anticholinesterase drug.
paralysis / enteroparesis myasthenia to restore/stimulate intestinal peristalsis bladder atony / urinary retention
Intoxication: stimulation of parasympathetic nervous system: myosis, sweating (hyperhydration), salivation, nausea+vomiting, diarrhea + muscle spasms (for anticholinesterases / proserin)
Mushroom
poisoning
(muscarine
muscarine stimulates M-cholinergic receptors stimulation of parasympathetic NS
Intoxication: myosis, sweating, hypersalivation, nausea+vomiting, diarrhea, bronchoconstriction, hypotension
Atropine
cholinergic blocker muscarinic/ M-blocker
antispasmodic bradycardia to decrease salivation to prevent hypersalivation and laryngospasm
Intoxication: thirst (dry mouth)+dilated pupils (mydriasis)/impaired vision +tachycardia+ agitation Contraindication: glaucoma
Dithyline
depolarizing muscle relaxantinitial twitching
/ contraction of muscles
trachea intubation during surgery
Side effect: respiratory paralysis Antidote: fresh frozen/ citrated plasma
Tubocurarine
(Curariform subs)
non-depolarizing muscle
relaxant
relaxation of all skeletal muscles Mechanism: blockade of N-cholinergic receptors of the synaptic membrane Antidote: Proserin (to restore spontaneous respiration)
Noradrenalin
non-selective adrenergic
agonist
hypotension (activates of α1-receptors)
Mesatone (Phenylephrine)
-adrenergic agonist, activation of α1-receptors
acute hypotension collapse/ acute vascular insufficiency (low BP) for pupil dilation (ophtalmology)
Isadrin (Isoproterenol)
β1+β2-adrenergic agonist
bronchial asthma (not recommended)
Side effect: heart stimulation: tachycardia, more frequent stenocardia attacks
Adrenaline (Epinephrine)
non-selective adrenergic agonist
anaphylactic shock insulin overdose (hypoglycemia)
Effects: increases the strength of cardiac contractions, activates cardiac (heart) β-adrenergic receptors increases plasma glucose level by activation of glycogenolysis in liver
Reserpine
hypotensive, sympatolytic
hypertension
Side effects: sleepiness, stomach pain
Lidocaine
local anesthetic
+ antiarrhythmicdrug
all types of anesthesia
blocks sodium ion channels Mechanism: membrane ionic
Novocaine
(Procaine)
local anesthetic
blocks sodium ion channels
Monoamine oxidase inhibitors Antidepressants Amithriptiline
inhibit MAO ↑ levels of dopamine, noradrenaline, serotonin in synapses
depression DO NOT change Acetylcholine levels