A gastroretentive drug formulation for the sustained release of an active agent in the gastrointestinal tract comprises an internal layer or compartment comprising an active agent and one or more pharmaceutical excipients, of which at least one is a polymer and two membranes forming together an envelope around the inner membrane, each membrane comprising at least one polymeric combination of an enteric polymer which is not soluble in gastric juice, and an hydrophilic swelling polymer, and at least one plasticizer.

This invention provides a method of colonic cleansing.

The present disclosure generally relates to preservation and delivery of a bioactive composition to a biological subject. In some embodiments, the bioactive composition include bioactives of at least one of microbes, cells, tissue, vaccines, probiotics, antibiotics, vitamins, or mRNA. Some embodiments include preserving the bioactive composition using vitrification of the bioactive composition in a vitrifying mixture of intrinsically disordered proteins and saccharides. The vitrified bioactive composition is configured to release the bioactive composition from the vitrifying mixture. Some embodiments include administering the vitrified bioactive composition to the biological subject, such that the administering includes applying the vitrified bioactive composition to a microbiome of the biological subject. Some embodiments may further include providing an enteric encapsulation of the vitrified bioactive composition that is configured to protect the vitrified bioactive composition from a first set of environmental conditions, but release the vitrified bioactive composition in a second set of environmental conditions.

A dosage form comprising a tablet core and one or more discontinuous coated regions in various configurations on the surface of the dosage form is disclosed. A method for making the dosage form is also disclosed.