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Diphenhydramine

Description Is a common over the counter antihistamine used in the treatment of the common cold and hay fever. 
Therapeutic Low 0.0250
Therapeutic High 0.1120
Units ug/mL 
Specimen
Half Life Low 3.00
Half Life High 14.00
VOD Low 3.00
VOD High 4.00
Toxic Level 5.000
Lethal Level 10.000
Plasma to Whole Blood ratio 1.30
Warnings Warnings - may impair mental and/or physical ability required for the performance of potentially hazardous tasks (e.g., driving, operating heavy machinery).