<p>Hypersensitivity to potassium administration e.g. hyperkalaemic periodic paralysis, congenital paramyotonia, marked renal failure (even when not yet associated with manifest hyperkalaemia), untreated Addison&#39;s disease, hyporeninaemic hypoaldosteronism, acute dehydration, hyperkalaemia and conditions involving extensive cell destruction (e.g. severe burns). In case of metabolic acidosis, the hypokalaemia should be treated not with potassium chloride.</p>