Pulaski's chicken soup

From Memory Alpha, the free Star Trek reference

Pulaski's chicken soup, commonly referred to as PCS by Dr. Pulaski, was a special recipe of hot chicken soup concocted by her. It could be used in conjunction with tryptophan-lysine distillate to treat influenza or other mild to moderate respiratory infections. Deanna Troi used the soup as an example for how much care Pulaski bestowed upon her patients. (TNG: "The Icarus Factor")