Pulmonary edema (American English), or oedema (British English; both words from the Greek Î¿á¼´Î´Î·Î¼Î±), is fluid accumulation in the air spaces and parenchyma of the lungs. It leads to impaired gas exchange and may cause respiratory failure.
According to Hershey's a 1.55 oz (43 g) milk chocolate bar has 9 mg of caffeine.
Even a 2-ounce chocolate bar has only 36 milligrams of caffeine -- a drop in the bucket for hard-core espresso drinkers! Not that caffeine is the main reason people eat chocolate, but be warned that getting your caffeine fix in the form of chocolate is going to cost you in calories!