Low (0-25%) Intermediate (25-75%) High (>75%)
ampicillin chloramphenicol acetylsalicylic acid
antipyrine digoxin amphotericin B
cephalosporins lincomycin ethacrynic acid
cycloserine nitrofurantoin clofibrate
ethanol penicillins digitoxin
kanamycin pentobarbital estrogens
lithium quinine glucocorticoids
paracetamol secobarbital griseofulvin
phenobarbital tetracyclines oral anticoagulants
strophantidin thiopental indomethacin
xanthines trimethoprim insulin
    mefenamic acid
    nalidixic acid
    phenylbutazone
    phenytoin
Box 1: Binding capacity of drugs to plasma proteins.