Low blood levels of phenobarbital due to poor gastrointestinal solubility of phenobarbital tablets.
D000293:Adolescent; D000328:Adult; D004064:Digestive System / Q000378:metabolism*; D006801:Humans; D008875:Middle Aged; D010634:Phenobarbital / Q000097:blood* / Q000378:metabolism; D012995:Solubility; D013607:Tablets; D013810:Therapeutic Equivalency
D013607:Tablets; D010634:Phenobarbital