Symptoms are nonspecific and usually result from the concomitant hypokalemia or hypocalcemia.  Common signs and symptoms include
Weakness/Fatigue
Vomiting or diarrhea
Hypoventilation
Metabolic alkalosis
Urine Cl < 20 mEq/L
Metabolic acidosis
Vomiting
Anion gap acidosis
NG suction
Hypercapnia
Bulimia