FORMULATION AND EVALUATION OF MODIFIED DISINTEGRATING SUSTAINED RELEASE TABLETS OF DILTIAZEM HYDROCHLORIDE

Lukkad Harish R.* and Oswal Rajesh

ABSTRACT

Oral drug delivery is the largest and the oldest segment of the total drug delivery market. It is the fastest growing and most preferred route for drug administration. In oral drug delivery, the sustained release (SR) tablets maintains the desired drug concentration for prolong period of time, reduced 'see- saw' fluctuation, reduced total dose, improved efficiency in treatment. But many patients like paediatric, geriatric and also patients may have difficulty in swallowing (Dysphagia) find it difficult to swallow tablets and thus do not comply with prescription. This problem is overcome by formulating and developing modified disintegrating sustained release tablets. In this case, first microspheres of the drug are formulated by using any suitable technique. And then optimized microspheres formulation is further formulated in to the fast disintegrating tablets (FDT) by using superdisintegrants. So that after taking such a tablets, the tablet only disintegrates into the mouth then microspheres are separated and ingestion of such microspheres starts releasing drug for prolonged period of time. This concept fulfills both the advantages of sustained release and fast disintegrating tablets.

Keywords: Oral drug delivery, Sustained release (SR) tablets, Fast disintegrating tablets (FDT), Microspheres, Superdisintegrants.