using a different sustained-release agent — hydroxypropyl cellulose (HPC) and polyvinyl alcohol (PVA), respectively — in their formulations. Neither of these agents is claimed in GSK's patent ...

today announced the launch of Low Nitrite METHOCEL™ hydroxypropyl methylcellulose (HPMC), a range of low nitrite cellulose ethers developed to reduce the risk of nitrosamine formation in ...