This invention provides for a unit dosage form of treprostinil at a dosage of between 0.1 mg/mL and 25 mg/mL in a sterile fluid composition formulated for subcutaneous or intravenous injection, which composition does not comprise an antimicrobial preservative. Selectively activatable patch-pump assemblies comprising a sealed prefilled drug-reservoir containing the unit dosage form is described as are methods for reducing pain at a site of subcutaneous or intravenous infusion of treprostinil in a subject in need thereof, and methods of reducing irritation, inflammation or a combination thereof at a site of subcutaneous or intravenous infusion of treprostinil in a subject in need thereof. The invention also provides a method of treating pulmonary hypertension, and methods for treating, or reducing the severity or reducing the pathogenesis of Pulmonary arterial hypertension (PAH) in a subject making use of the compositions as herein described.

Methods for the synthesis of a tricyclic-prostaglandin D.sub.2 metabolite methyl ester or a pharmaceutically acceptable salt thereof.

This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.

Embodiments include a system including a sealed prefilled drug-reservoir. The drug-reservoir may include a unit dosage of treprostinil in a sterile fluid composition. The composition may not include an antimicrobial preservative. The treprostinil may be present at a dosage of between 0.1 mg/mL and 25 mg/mL. In addition, the treprostinil may be treprostinil sodium Furthermore, the composition may include sodium chloride. The composition may also include a sodium ion from sodium chloride in a concentration from 3000 to 4500 ppm. The composition may not include metacresol.

This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.

Embodiments include a system including a sealed prefilled drug-reservoir. The drug-reservoir may include a unit dosage of treprostinil in a sterile fluid composition. The composition may not include an antimicrobial preservative. The treprostinil may be present at a dosage of between 0.1 mg/mL and 25 mg/mL. In addition, the treprostinil may be treprostinil sodium Furthermore, the composition may include sodium chloride. The composition may also include a sodium ion from sodium chloride in a concentration from 3000 to 4500 ppm. The composition may not include metacresol.

This invention provides for a unit dosage form of treprostinil at a dosage of between 0.1 mg/mL and 25 mg/mL in a sterile fluid composition formulated for subcutaneous or intravenous injection, which composition does not comprise an antimicrobial preservative, and methods of reducing irritation, inflammation or a combination thereof at a site of subcutaneous or intravenous infusion of treprostinil in a subject in need thereof.

This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.

This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.

This present invention relates to an improved process to prepare prostacyclin derivatives. One embodiment provides for an improved process to convert benzindene triol to treprostinil via salts of treprostinil and to purify treprostinil.