C&P: Opioids Flashcards
Opioids pH
All bases
Morphine: pKa
8.0
Morphine: relative lipid solubility
1 (ie relative to itself)
Morphine: relative potency
1 (ie relative to itself)
Morphine: protein binding (%)
35
Morphine: volume of distribution (L/kg)
3.5
Morphine: oral bioavailability (%)
25-30
Morphine: metabolism
Glucuronidation; N-demethylation
Morphine: clearance (ml/(kg*min))
16
Morphine: elimination rate (min)
170
Diamorphine: chemical composition
Diacetylmorphine
Diamorphine: pKa
7.6
Diamorphine: relative lipid solubility
250
Diamorphine: relative potency
2
Diamorphine: protein binding (%)
40
Diamorphine: volume of distribution (L/kg)
5
Diamorphine: oral bioavailability
low
Diamorphine: metabolism
ester hydrolysis to morphine
Diamorphine: clearance (ml/(kg*min))
3.1
Diamorphine: elimination rate (min)
5 (half life)
Codeine: chemical composition
methylmorphine
Codeine: pKa
8.2
Codeine: relative lipid solubility
n/a
Codeine: relative potency
0.1