Dispensing system for administering beneficial agent

Claim 1

A dispersing device for delivering a beneficial agent formulation to an aqueous fluid environment of use, which dispensing device comprises: (a) wall means for surrounding and forming an internal compartment, said wall means comprising in at least a part a semipermeable composition permeable to the passage of aqueous fluid present in the environment of use; (b) a beneficial agent formulation in the compartment, said beneficial agent formulation forming with aqueous fluid that passes through the semipermeable wall into the compartment a dispensable beneficial agent aqueous formulation; (c) hydrogel means in the compartment for absorbing aqueous fluid for occupying an increasing amount of space in the compartment; (d) density means in the compartment for increasing the weight of the dispersing device, said means having a density greater than the density of aqueous fluid present in the environment of use, and which density means is a powder, granule or pellet mixed with the hydrogel means for absorbing aqueous fluid and retained therein during the dispensing of the dispensable beneficial agent aqueous formulation; and, (e) means in the wall connecting the exterior of the dispensing device with the compartment for delivering the beneficial agent aqueous formulation to the environment of use.