title: Drug entry into the brain.
mesh_terms: D000818:Animals; D001810:Blood Volume; D001812:Blood-Brain Barrier; D002199:Capillary Permeability; D002560:Cerebrovascular Circulation; D008297:Male; D008433:Mathematics; D004364:Pharmaceutical Preparations / Q000097:blood*; D011485:Protein Binding; D011868:Radioisotopes / Q000032:analysis; D051381:Rats
chemical_list: D004364:Pharmaceutical Preparations; D011868:Radioisotopes