Abstract: A process for minimizing formation of a highest degradation product during moist heat sterilization of a drug solution of an oxidation susceptible active pharmaceutical ingredient is provided. The oxidation susceptible active pharmaceutical ingredient is mixed with excipients and deoxygenated water to prepare a non-sterile drug solution. The non-sterile drug solution is filled into a moist heat sterilizable flexible infusion bag. The flexible infusion bag with the non-sterile drug solution is terminally moist heat sterilized at a preset air overpressure between about 0.2 bar to about 1.2 bar to obtain a parenteral drug product. The highest degradation product in the parenteral drug product is less than 0.5% by weight of a labeled amount of the oxidation susceptible active pharmaceutical ingredient in the parenteral drug product.

Abstract: A lyophilized bendamustine composition consisting of bendamustine hydrochloride, an aqueous solvent, and optionally an excipient, and a method of preparation thereof for treating a condition in a subject are provided. The aqueous solvent includes, for example, water, an acid, a base, or a salt, etc. The excipient includes at least one cryoprotectant, for example, sucrose, trehalose, mannitol, etc. A pre-lyophilization bendamustine composition is lyophilized, for example, by freezing, primary drying, annealing, secondary drying, condensed cooling and evacuation at preset temperatures to obtain the lyophilized bendamustine composition as a cake, a powder, or a solid concentrate. The lyophilized bendamustine composition is free of a non-aqueous solvent. Reconstitution is performed by mixing the lyophilized bendamustine composition with an aqueous solvent for about 30 seconds to 300 seconds. The reconstituted bendamustine product containing about 0.2 wt % to about 2.