Complex sentence: Diphenhydramine may be quantitated in blood, plasma, or serum to monitor therapy, confirm a diagnosis of poisoning in hospitalized patients, provide evidence in an impaired driving arrest, or assist in a death investigation.
Split into simpler sentences: Diphenhydramine may be quantitated in blood, plasma, or serum. Quantitation can to be used monitor therapy, confirm a diagnosis of poisoning in hospitalized patients, provide evidence in an impaired driving arrest, or assist in a death investigation.