Starting at
$129
Walk-In Lab
Lowest PriceOnlineDiphenhydramine (Benadryl) Blood Test
The Diphenhydramine (Benadryl) Blood test measures the diphenhydramine levels in the blood to screen for potential overdose.
Updated 7/22/2025
$129
Order TestThe Diphenhydramine (Benadryl) Blood test measures the diphenhydramine levels in the blood to screen for potential overdose.