Methods and compositions are provided for increasing the anaerobic working capacity of muscle and other tissues. Also provided are compositions formulated for the sustained release of free beta-alanine. Also provided is a dietary supplement formulated, for example, as a solid food product, an edible suspension, liquid or semi-liquid as described herein.

Residence structures, systems, and related methods are generally provided. Certain embodiments comprise administering (e.g., orally) a residence structure to a subject (e.g., a patient) such that the residence structure is retained at a location internal to the subject for a particular amount of time (e.g., at least about 24 hours) before being released. The residence structure may be, in some cases, a gastric residence structure. In some embodiments, the structures and systems described herein comprise one or more materials configured for high levels of active substances (e.g., a therapeutic agent) loading, high active substance and/or structure stability in acidic environments, mechanical flexibility and strength in an internal orifice (e.g., gastric cavity), easy passage through the GI tract until delivery to at a desired internal orifice (e.g., gastric cavity), and/or rapid dissolution/degradation in a physiological environment (e.g., intestinal environment) and/or in response to a chemical stimulant (e.g., ingestion of a solution that induces rapid dissolution/degradation). In certain embodiments, the structure has a modular design, combining a material configured for controlled release of therapeutic, diagnostic, and/or enhancement agents with a structural material necessary for gastric residence but configured for controlled and/or tunable degradation/dissolution to determine the time at which retention shape integrity is lost and the structure passes out of the gastric cavity. For example, in certain embodiments, the residence structure comprises a first elastic component, a second component configured to release an active substance (e.g., a therapeutic agent), and, optionally, a linker. In some such embodiments, the linker may be configured to degrade such that the residence structure breaks apart and is released from the location internally of the subject after a predetermined amount of time.

Controlled release dosage forms comprising a pharmaceutically active agent capable of not more than 90% release in 12 hours in a simulated gastric juice in first order release rate USP type 1 dissolution test, comprising (a) a tablet made from polymer matrix of at least two biocompatible polymers, the pharmaceutically active agent and excipients; the tablet capable of rapid swelling without disintegration in simulated gastric juice to a size resulting in gastric retention in the stomach and controlled release of the active agent by controlled erosion and diffusion immediately after coming into contact with the gastric juice, or (b) microspheres of ungrafted chitosan or a chitosan derivative or CARBOPOL incorporating the active agent which is not a polymeric molecule and after administration in stomach, the microspheres adhere to the gastric mucosa for a long and controlled time release of the active agent.

An oral composition comprising minicapsules wherein the minicapsules comprise one or more therapeutic or prophylactic substances in a liquid, semi-liquid, or solid core. The minicapsules have release profiles to release the substance in an active form at one or more sites along the gastro-intestinal tract to maximize absorption and/or therapeutic efficiency.

Drug-delivery systems such as drug-delivery stents having an anti-proliferative agent such as everolimus and an anti-flammatory agent such as clobetasol are provided. Also disclosed are methods of treating a vascular impairment such as restenosis or vulnerable plaque.

The present disclosure provides oral dosage forms comprising an antiplatelet agent and an enterically coated acid inhibitor, as well as methods of treating subjects with an antiplatelet agent and an enterically coated acid inhibitor.