Coffee
From Gomerpedia
Coffee[1] is a magical elixir 99.9% of health care providers drink to keep awake through the reality that is our careers. It is a rare source of hope and happiness in the clinical setting, even if it tastes like sin or looks like melena. What matters is that coffee[2] does the job and feels like it's made from unicorn smiles and angels' wings. Fear the provider who hasn't had his or her cup of morning joe.
References