The Class III antiarrhythmic compound, MS551 (nifekalant), was described to have antiarrhythmic properties shortly after the CAST results had been published [93]

10 mL vial Bacteriostatic sodium chloride for injection Contains preservative Sterile diluent solution Used for reconstitution or dilution of compatible medications Suitable for multiple-dose vial use when handled properly Manufactured by Pfizer Intended for professional or directed medical use Practical for clinics, pharmacies, and healthcare settings Provides a sterile diluent option for compatible injectable medications Preservative-containing formula supports repeated vial access within approved use limits Convenient 10 mL size for medication preparation Helps support accurate medication mixing when used as directed Useful for healthcare professionals, clinics, and medication preparation workflows Pfizer brand supports trusted pharmaceutical sourcing Practical for settings requiring bacteriostatic diluent supply Ideal for use as a diluent for compatible medications that require sterile sodium chloride solution for injection preparation, reconstitution, or dilution as directed by a healthcare professional

[3] Perovic, D., Kolenc, D., Bilic, V
A US site in North Augusta, South Carolina, is expanding under a stated $121.9 million investment
, May A., Kolvraa S., and Bohr V
For the laboratory researcher, the two peptides remain interesting tools provided they are used for what they truly are: compounds research use only With a robust but asymmetrical preclinical literature (35 AJSM 2026 studies for BPC-157, muscle/cardiac base for TB-500), and extremely limited human data on both sides, maintaining this nuance helps avoid claims not supported by science and properly position the two peptides within a well-designed research protocol