Sun Pharma and Glenmark are contesting over their right to use drug names "Istamet" and "Indamet", respectively, which Sun Pharma finds to be deceptively similar and confusing. While Sun Pharma's medicine Istamet sold in the form of tablets under the extensions - ISTAMEsT, ISTAMET XR, and ISTAMET XR CP - is a Schedule 'G' drug, Glenmark's medicine under mark Indamet is a Schedule 'H' drug used for treatment of asthma.
