Omeprazole sodium (H 16868 sodium), a proton pump inhibitor (PPI), is available for treatment of acid-related gastrointestinal disorders. Omeprazole sodium shows competitive inhibition of CYP2C19 activity with a Ki of 2 to 6 μM. Omeprazole sodium also inhibits growth of Gram-positive and Gram-negative bacteria. Omeprazole is a potent brain penetrant neutral sphingomyelinase (N-SMase) inhibitor (exosome inhibitor).