Elimination Flashcards
Elimination 2 way?
Excretion
Metabolism
Organs aiding in excretion?
Liver, kidney, lung, skin alumanry tract, colon
Kidney excretion types?
Passive glomerular filtration
Active tubular excretion
Renal reabsorption
Active tubular excretion drugs?
Weak acid: penicillin, frusemide
Weak base : digoxin
Renal reabsorption?
Lipid soluble drugs are reabsorbed so it can turn polar by metabolic degradation, conjugation
Passive glomerular filtration
For low molecular weight drugs,
Watersoluble
Non bounded
Mannitole example
How does change in PH of urine affect excretion?
Alkalization helps eliminate acidic drug like aspirin and barbiturates
Acidification of urine helps eliminate basic drugs like amphetamine ephedrine
Enterohepatic circulation
When a drug is absorbed by liver it is conjugated by bile then sent to intestine where bacteria returns the drug to preconjugation form which causes drug tobe reabsorbed by the liver for the cycle tocontinue causes prolongationof drugeffect