Letter: Piracetam and pyrithioxine.
D000818:Animals; D001812:Blood-Brain Barrier / Q000187:drug effects; D002540:Cerebral Cortex / Q000378:metabolism; D002648:Child; D006801:Humans; D007859:Learning Disabilities / Q000188:drug therapy*; D010889:Piracetam / Q000494:pharmacology / Q000627:therapeutic use*; D011725:Pyridines / Q000627:therapeutic use*; D011746:Pyrithioxin / Q000494:pharmacology / Q000627:therapeutic use*; D011760:Pyrrolidinones / Q000627:therapeutic use*
D011725:Pyridines; D011760:Pyrrolidinones; D011746:Pyrithioxin; D010889:Piracetam