Which route of administration provides the slowest absorption into the brain, in general?

Question

Quizplus · Accepted Answer

Oral administration generally provides the slowest absorption into the brain because the drug must first pass through the digestive system, undergo metabolism in the liver, and then enter the bloodstream before it can reach the brain. This process can take several hours, leading to delayed onset of effects compared to other routes of administration such as inhalation or injection.

Which Route of Administration Provides the Slowest Absorption into the Brain