Controlled release matrix

A controlled release matrix (also known as a sustained release or extended release matrix) is a pharmaceutical drug delivery system designed to release an active ingredient in a predictable, prolonged manner, typically through oral solid dosage forms such as tablets. The drug is homogeneously dispersed within a polymeric matrix—often hydrophilic, hydrophobic, or a combination—such that release is regulated by diffusion, erosion, or swelling of the matrix upon contact with gastrointestinal fluids[1][3][4][5][9]. This approach reduces dosing frequency, improves patient compliance, maintains more consistent plasma drug levels, and minimizes side effects associated with peaks and troughs of traditional immediate release formulations[1][2][7]. Controlled/sustained release matrices are not molecular targets but are critical enabling technologies widely used for chronic therapies in diseases such as diabetes, hypertension, and other conditions requiring consistent drug levels[1][3][7].

Other names

Controlled/sustained release matrixMatrix tabletControlled release matrix tabletSustained release matrixCR matrixSR matrix

Not applicable in the sense of a pharmacological target, but the mechanism involves diffusion, dissolution, and/or erosion of a polymeric matrix to control drug release over time[1][5][9]. In reservoir or osmotic versions, osmotic pressure or a semi-permeable membrane may be involved[1][9].