After this period, the patient is in a new steady state in which further sodium and water losses do not occur. However, in many patients with diuretic-induced hyponatremia, the disorder first appears after many months of uncomplicated thiazide therapy [5,12].
Out of more than 480 shark species, only three are responsible for a double-digit number of fatal, unprovoked attacks on humans: the great white, tiger, and bull; however, the oceanic whitetip has probably killed many more castaways, not recorded in the statistics.
Sharks often decide not to attack if multiple dolphins are in the neighborhood. One theory is that they don't like the noises dolphins make. Dolphins have been known to ward off shark attacks directed at humans. One such incident was reported by NBC's Today show in 2007. However, sharks are also known to kill or attack individual dolphins occasionally.