Systopic Laboratories Pvt. Ltd. Supplies Sustained Release Diclofenac Sodium Composition. Systopic Laboratories Pvt. Ltd. Manufactures innovative products aimed to deliver better therapeutic solutions. Sustained Release Diclofenac Sodium Composition is used for the management of painful inflammatory conditions. Sustained Release Diclofenac Sodium Composition is a potent anti-inflammatory drug with analgesic-antipyretic properties. Diclofenac inhibits cyclo-oxygenase activity with reduction in tissue production of prostaglandin. It is available in the packet of 100 tabs / box [10 X 10]. This can be available in the brand name of NAC SR-75/100.