Formulation and Evaluation Of Colon Targeted Drug Delivery System Of Edotolac Tablets

ABSTRACTEtodolac is used for the management of rheumatoid osteoarthritis. The site of absorption of Etodolac is in the whole GI tract and has a long half-life of 7± 4 hrs. The aim of the study was to develop colon targeted compression coated tablets of Etodolac using HPMC as swellable, time-controlled polymer, Eudragit S 100 as a coating polymer guar gum and chitosan as carriers in the treatment of Osteoarthritis. All the formulations (F1 to F5) were evaluated for the physicochemical parameters and were subjected to in vitro drug release studies. The amount of Etodolac released from tablets at different time intervals was estimated by UV spectrophotometer. The formulation F3 released 95.24% of Etodolac. The results of the study showed that formulation F3 is most likely to provide targeting of Etodolac for local action in the colon owing to its minimal release of the drug in the first 5 h. The most satisfactory formulation was stable during stability studies conducted for 60 days as per ICH guidelines. It showed no significant changes in the physicochemical parameters, in vitro release pattern. The studies confirmed that, the designed formulation could be used potentially for colon delivery by controlling drug release in stomach and the small intestine.Keywords: Etodolac, rheumatoid osteoarthritis, HPMC and colon targeted.