Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Cerebrospinal fluid penetration
Introduction
Cerebrospinal fluid penetration is the proportion of drug that crosses the blood-brain barrier to enter the cerebrospinal fluid. It is usually expressed as a percentage of the blood concentration.