Stability and antimicrobial effectiveness of treprostinil sodium in Sterile Diluent for Flolan.

Introduction: Long-term intravenous infusion of epoprostenol and treprostinil for treatment of pulmonary arterial hypertension (PAH) via a central venous catheter is associated with the risk of bloodstream infection (BSI). While several potential explanations exist for possible differences in BSI incidence among intravenous prostanoids, one hypothesis suggests that the alkaline pH of epoprostenol in Sterile Diluent for Flolan (SDF) has greater antimicrobial activity compared with the neutral pH of other common diluents such as sterile saline or water, which have been used for treprostinil.

Methods: The chemical stability and antimicrobial activity of 4 microg/ml and 130 microg/ml treprostinil in SDF were assessed according to United States and European Pharmacopeia.

A novel catheter system for totally implantable intravenous drug therapy: assessment of catheter function and patency with trepostinil therapy.

Background: Catheter failure, either due to dislodgment, occlusion or infection is the leading complication of chronic intravenous drug therapy. Better drug delivery techniques are required to advance life saving therapies that require this delivery method. This study evaluated the chronic performance of a fully implantable drug delivery system that incorporates a novel intravenous catheter.

exo-Imino to endo-iminocyclitol rearrangement. A general route to five-membered antiviral azasugars.

A facile synthesis is reported for five-membered iminocyclitols which allows for variation in stereochemistry at all the chiral centers, diverse C1- and N-substitution, and the potential for a three-component combinatorial process. The key step is inversion at the C4 stereocenter (L-lyxo sugar --> D-ribono azasugar). The exo-imino to endo-iminocyclitol process was extended to the D-lyxo and the D- and L-hexose series.

Stability and preservative effectiveness of treprostinil sodium after dilution in common intravenous diluents.

The stability of treprostinil sodium after dilution in three common i.v. infusion vehicles was assessed.

Development of a topically active imiquimod formulation.

The purpose of this work was to develop a topical formulation of imiquimod, a novel immune response modifier, to induce local cytokine production for the treatment of external genital and perianal warts. A pH-solubility profile and titration data were used to calculate a pKa of 7.3, indicative of a weak base.