[4] By mouth it can result in abdominal pain, peptic ulcer disease, or gastrointestinal bleeding.

[2] As long as high blood potassium does not occur, use in pregnancy or breastfeeding is believed to be safe for the baby.

[medical citation needed] Overdoses cause hyperkalemia, which can lead to paresthesia, cardiac conduction blocks, fibrillation, arrhythmias, and sclerosis.

[15] Brand names include K-Dur, Klor-Con, Micro-K, Slow-K, Sando-K, and Kaon Cl.

[16][17] Jack Kevorkian's thanatron machine injected a lethal dose of potassium chloride into the patient, which caused the heart to stop functioning, after a sodium thiopental-induced coma was achieved.