Abstract: Polymer and drug containing compositions and method of preparing such compositions are disclosed. The dispersed phase formulation has a polymer, a pharmaceutically or biologically active agent and a small fraction of low pKa acid additive. Stable, filter sterilizable, non-gelling solutions containing GnRH analogues at least at levels typically used in sustained release formulations and a method of increasing solubility of a high level of a GnRH analogue or a freeze-dried antgonist of GnRH in a polymer containing solution are also disclosed. The amount of the acid additive in the polymer solution is such that it is sufficient to increase the solubility of the high level of the GnRH analogue in the polymer solution without affecting the release characteristics of the microspheres prepared therefrom.

Abstract: Polymer and drug containing compositions and method of preparing such compositions are disclosed. The dispersed phase formulation has a polymer, a pharmaceutically or biologically active agent and a small fraction of low pKa acid additive. Stable, filter sterilizable, non-gelling solutions containing GnRH analogues at least at levels typically used in sustained release formulations and a method of increasing solubility of a high level of a GnRH analogue or a freeze-dried antgonist of GnRH in a polymer containing solution are also disclosed. The amount of the acid additive in the polymer solution is such that it is sufficient to increase the solubility of the high level of the GnRH analogue in the polymer solution without affecting the release characteristics of the microspheres prepared therefrom.

Abstract: Polymer and drug containing compositions and method of preparing such compositions are disclosed. The dispersed phase formulation has a polymer, a pharmaceutically or biologically active agent and a small fraction of low pKa acid additive. Stable, filter sterilizable, non-gelling solutions containing GnRH analogs at least at levels typically used in sustained release formulations and a method of increasing solubility of a high level of a GnRH analog or a freeze-dried antgonist of GnRH in a polymer containing solution are also disclosed. The amount of the acid additive in the polymer solution is such that it is sufficient to increase the solubility of the high level of the GnRH analog in the polymer solution without affecting the release characteristics of the microspheres prepared therefrom.

Abstract: Polymer and drug containing compositions and method of preparing such compositions are disclosed. The dispersed phase formulation has a polymer, a pharmaceutically or biologically active agent and a small fraction of low pKa acid additive. Stable, filter sterilizable, non-gelling solutions containing GnRH analogues at least at levels typically used in sustained release formulations and a method of increasing solubility of a high level of a GnRH analogue or a freeze-dried antagonist of GnRH in a polymer containing solution are also disclosed. The amount of the acid additive in the polymer solution is such that it is sufficient to increase the solubility of the high level of the GnRH analogue in the polymer solution without affecting the release characteristics of the microspheres prepared therefrom.

Abstract: Antagonistic peptides of GnRH having improved water solubility are disclosed. These peptides are capable of suppressing serum testosterone levels in vivo to chemical castration levels of ?0.5 ng/ml. Stable, filter sterilizable, non-gelling solutions containing the GnRH antagonists at least at levels typically used in sustained release formulations also are disclosed, as is a method of increasing the solubility of GnRH antagonist in a polymer containing dispersed phase, which method comprises addition of an acid to the dispersed phase.

Abstract: Antagonistic peptides of GnRH having improved water solubility are disclosed. These peptides are capable of suppressing serum testosterone levels in vivo to chemical castration levels of ?0.5 ng/ml. Stable, filter sterilizable, non-gelling solutions containing the GnRH antagonists at least at levels typically used in sustained release formulations also are disclosed, as is a method of increasing the solubility of GnRH antagonist in a polymer containing dispersed phase, which method comprises addition of an acid to the dispersed phase.