| This article is rated Stub-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
| |||||||||||
Routes of administration
While IV raises blood levels the fastest, inhalation is actually the fastest route to the brain. Blood goes from the heart to the lungs to the heart to the brain. Venous use requires the blood to circulate back to the heart first. —Preceding unsigned comment added by 98.204.241.151 (talk) 00:36, 7 February 2011 (UTC)