RFK Jr. may make it easier to get peptides but what do doctors think? Lisa Cassileth MD, FACS Conventional Antiarrhythmics Class IIV, Late INa Inhibitors, IKs Enhancers, RyR2 Stabilizers, Gap Junction Modulators, Atrial Selective Antiarrhythmics, and Stable Gastric Pentadecapeptide BPC 157 as Useful Cytoprotective Therapy in Arrhythmias Conventional Antiarrhythmics Class IIV, Late INa Inhibitors, IKs Enhancers, RyR2 Stabilizers, Gap Junction Modulators, Atrial Selective Antiarrhythmics, and Stable Gastric Pentadecapeptide BPC 157 as Useful Cytoprotective Therapy in Arrhythmias BPC 157 Ascend Bio Labs In patients with cardiovascular disease, hypokalemia and even low normal plasma potassium levels increase the risk of ventricular arrhythmias. Whether actively increasing plasma potassium to the high normal range reduces risk is unclear.