Gastroretentive drug delivery device having expandable structure and manufacturing method therefor

Abstract

The present disclosure provides a gastroretentive drug delivery device having an expandable structure. The drug delivery device includes: a capsule body having a space formed therein; an arm mounted at one end of the capsule body, the arm comprising a first hinge part, a second hinge part, a third hinge part and an elastic support part which enable unfolding and folding, wherein the first hinge part engages the elastic support part, the second hinge part engages a wing of the arm and is connected rotatably to the first hinge part, the third hinge part is positioned at one end of the wing and is connected rotatably to the second hinge part, a sustained-release supporter is positioned to face the third hinge part, an immediate-release formulation is positioned to face the elastic support part, and a sustained-release formulation is positioned between the sustained-release supporter and the immediate-release formulation; an elastic body acting to move the elastic support part in a direction toward the one end of the capsule body within the capsule body; and a capsule cap configured to engage the other end of the capsule body.