03 Dose
Last updated
Last updated
peak effect of morphine higher: morphine more effecacious
peak effect at lower dose: morphine more potent
quantal: if drug eliminate headache
EC50 or ED50: effective concentration or dosage. Dose needed to get 50% Emax
log of dose on X: S shaped curve, better for E50
same maximum effect
e.g. beta agonist and beta blocker at same time
beta blocker competes with beta agonist. At higher dose, beta agonist outcompete beta blocker
Emax same: how much effect beta agonist can stimulate one each receptor is same
bind to beta receptor, change its shape and make it bind agonist less
increasing dose cannot overcome effect
same thing as removing beta receptor from system
E50 same
add noncompetitive antagonist, should lower Emax but shifts it right instead
reason: spare receptors activated with less potency binding
eventually with high dose noncompetitive antagonist, lower Emax, antagonize also spare receptors
increasing partial agonist dose: competitive binding
response instead of percent
clomiphene: activate estrogen receptors but not as much as estrogen
ED50: dose required for 50% pts response
lethal dose and toxic dose
higher therapeutic index: more apart LD50 and ED50, wider therapeutic window