Effects of Binders and Moisture Content on the Disintegration, Hardness and Friability of Paracetamol and Orphenadrine Citrate Tablets

The effects of binders and moisture content on the disintegration time, friability and hardness of paracetamol and orphenadrine citrate tablets at different storage conditions were investigated. These parameters were determined after one, four and sixteen weeks of storageThe use of starch, ethocel or CMC Na as binders gave unsatisfactory tablets because of their high friability. Unacceptably high disintegration times were obtained, particularly at higher storage temperatures when PVP was used. Capping and yellow spotting observed in gelatin formulations makes this binder unsuitable for use. Methocel granulations yielded satisfactory tablets with acceptable disintegration time, hardness and friability and were unaffected by storage at different conditions of temperature and humidity