Abstract: Liquid polymer pharmaceutical compositions with a biodegradable liquid polymer, a biocompatible solvent or combination or mixture of solvents and/or co-solvents, and an active pharmaceutical agent comprising a peptide are useful to provide extended long-term release of the drug to a subject and/or to improve the stability of the active pharmaceutical agent. In embodiments, the polymer may be initiated with a low-molecular weight polyethylene glycol and/or may be a block copolymer comprising a low-molecular weight polyethylene glycol block. In further embodiments, the liquid polymer pharmaceutical composition may include a divalent cation, which may be provided in the form of a metal salt.

Abstract: Liquid polymer pharmaceutical compositions comprising a biodegradable liquid polymer, a biocompatible solvent system, and an active pharmaceutical ingredient (API) are disclosed. The compositions of the invention are useful for providing extended, long-term release of the API.

Abstract: Methods according to the present invention decolorize a polymer by mixing a solution of the polymer with a photocatalyst and exposing the mixture to ultraviolet light; by way of non-limiting example, the polymer may be a star polymer and the photocatalyst may be titanium dioxide. Methods according to the present invention also utilize a metal scavenger, in some embodiments a solid-phase metal scavenger, to remove a metal catalyst from a polymer solution; by way of non-limiting example, the metal catalyst may be a tin catalyst. The decolorization methods and the catalyst removal methods of the present invention may be practiced separately, sequentially in any order, or simultaneously.

Abstract: Methods according to the present invention decolorize a polymer by mixing a solution of the polymer with a photocatalyst and exposing the mixture to ultraviolet light; by way of non-limiting example, the polymer may be a star polymer and the photocatalyst may be titanium dioxide. Methods according to the present invention also utilize a metal scavenger, in some embodiments a solid-phase metal scavenger, to remove a metal catalyst from a polymer solution; by way of non-limiting example, the metal catalyst may be a tin catalyst. The decolorization methods and the catalyst removal methods of the present invention may be practiced separately, sequentially in any order, or simultaneously.