A neutral salt consisting of a polyaminosaccharide cation and an anion, as well as a procedure for the preparation of the neutral salt and uses thereof as a biomaterial and as an ingredient in pharmaceutical compositions are disclosed. Indeed, said neutral salt has surprisingly exhibited high water-solubility and high purity, the preparation procedure having minimised the content of high-risk contaminants in the final product and reduced reaction and purification times.

A neutral salt consisting of a polyaminosaccharide cation and an anion, as well as a procedure for the preparation of the neutral salt and uses thereof as a biomaterial and as an ingredient in pharmaceutical compositions are disclosed. Indeed, said neutral salt has surprisingly exhibited high water-solubility and high purity, the preparation procedure having minimised the content of high-risk contaminants in the final product and reduced reaction and purification times.

The present invention provides for a method of improving the release of non-steroidal anti-inflammatory drugs (NSAIDs) from a plaster or bandage comprising an adhesive layer with a pharmaceutically acceptable NSAID together with heparin or a heparinoid. The invention also provides for methods of reducing muscle hyperalgesia in subjects without spontaneous pain.

The present invention provides for a method of improving the release of non-steroidal anti-inflammatory drugs (NSAIDs) from a plaster or bandage comprising an adhesive layer with a pharmaceutically acceptable NSAID together with heparin or a heparinoid. The invention also provides for methods of reducing muscle hyperalgesia in subjects without spontaneous pain.

The present invention provides for a method of improving the release of non-steroidal anti-inflammatory drugs (NSAIDs) from a plaster or bandage comprising an adhesive layer with a pharmaceutically acceptable NSAID together with heparin or a heparinoid. The invention also provides for methods of reducing muscle hyperalgesia in subjects without spontaneous pain.

The present invention provides for a method of improving the release of non-steroidal anti-inflammatory drugs (NSAIDs) from a plaster or bandage comprising an adhesive layer with a pharmaceutically acceptable NSAID together with heparin or a heparinoid. The invention also provides for methods of reducing muscle hyperalgesia in subjects without spontaneous pain.

The present invention aims to provide a method for producing a porous substrate containing a bioabsorbable polymer and heparin in a simple manner without use of a surfactant, a porous substrate containing a bioabsorbable polymer and heparin, and an artificial blood vessel. The present invention provides a method for producing a porous substrate containing a bioabsorbable polymer and heparin, including: a solution preparing step of preparing a heparin-bioabsorbable polymer solution having heparin uniformly dispersed therein and a bioabsorbable polymer dissolved therein, using the bioabsorbable polymer, the heparin, a solvent 1 that is a poor solvent having a lower solvency for the bioabsorbable polymer, a solvent 2 that is a good solvent having a higher solvency for the bioabsorbable polymer and is incompatible with the solvent 1, and a common solvent 3 compatible with the solvent 1 and the solvent 2; a precipitating step of cooling the heparin-bioabsorbable polymer solution to precipitate a porous body containing the bioabsorbable polymer and the heparin; and a freeze-drying step of freeze-drying the porous body containing the bioabsorbable polymer and the heparin to provide a porous substrate containing the heparin.

The present invention aims to provide a method for producing a porous substrate containing a bioabsorbable polymer and heparin in a simple manner without use of a surfactant, a porous substrate containing a bioabsorbable polymer and heparin, and an artificial blood vessel. The present invention provides a method for producing a porous substrate containing a bioabsorbable polymer and heparin, including: a solution preparing step of preparing a heparin-bioabsorbable polymer solution having heparin uniformly dispersed therein and a bioabsorbable polymer dissolved therein, using the bioabsorbable polymer, the heparin, a solvent 1 that is a poor solvent having a lower solvency for the bioabsorbable polymer, a solvent 2 that is a good solvent having a higher solvency for the bioabsorbable polymer and is incompatible with the solvent 1, and a common solvent 3 compatible with the solvent 1 and the solvent 2; a precipitating step of cooling the heparin-bioabsorbable polymer solution to precipitate a porous body containing the bioabsorbable polymer and the heparin; and a freeze-drying step of freeze-drying the porous body containing the bioabsorbable polymer and the heparin to provide a porous substrate containing the heparin.

The present invention includes a hydrogel and a method of making a porous hydrogel by preparing an aqueous mixture of an uncrosslinked polymer and a crystallizable molecule; casting the mixture into a vessel; allowing the cast mixture to dry to form an amorphous hydrogel film; seeding the cast mixture with a seed crystal of the crystallizable molecule; growing the crystallizable molecule into a crystal structure within the uncrosslinked polymer; crosslinking the polymer around the crystal structure under conditions in which the crystal structure within the crosslinked polymer is maintained; and dissolving the crystals within the crosslinked polymer to form the porous hydrogel.

The present invention includes a hydrogel and a method of making a porous hydrogel by preparing an aqueous mixture of an uncrosslinked polymer and a crystallizable molecule; casting the mixture into a vessel; allowing the cast mixture to dry to form an amorphous hydrogel film; seeding the cast mixture with a seed crystal of the crystallizable molecule; growing the crystallizable molecule into a crystal structure within the uncrosslinked polymer; crosslinking the polymer around the crystal structure under conditions in which the crystal structure within the crosslinked polymer is maintained; and dissolving the crystals within the crosslinked polymer to form the porous hydrogel.