It was first marketed in the US in 1989 by
AstraZeneca under the brand names Losec and Prilosec, and is now also available from generic manufacturers under various brand names. AstraZeneca markets omeprazole as Losec, Antra, Gastroloc, Mopral, Omepral, and Prilosec. Omeprazole is marketed as Zegerid by Santarus, Prilosec OTC.
The side affects mentioned in the above post can happen after long term use.......