Fig 1. Observed morphine plasma concentrations (μg/L).
Dotted lines indicate the proposed therapeutic window of 10–40 μg/L; solid line indicates the potentially toxic limit of 300 μg/L.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.