Interference of theophylline and caffeine in the gas-chromatographic estimation of phenobarbital.
D002110:Caffeine / Q000097:blood*; D002849:Chromatography, Gas / Q000379:methods; D006801:Humans; D010634:Phenobarbital / Q000097:blood*; D013806:Theophylline / Q000097:blood*
D002110:Caffeine; D013806:Theophylline; D010634:Phenobarbital