Sarah Katz, 21, had a heart condition and died hours after she drank Panera’s Charged Lemonade, a large cup of which contains more caffeine than Red Bull and Monster energy drinks combined.

Sarah Katz, 21, had a heart condition and died hours after she drank Panera’s Charged Lemonade, a large cup of which contains more caffeine than Red Bull and Monster energy drinks combined.

All Panera Bread restaurants are now displaying "enhanced" disclosures about the restaurant chain’s highly caffeinated lemonade, a spokesperson said Saturday, following a lawsuit that was filed by the family of a young woman who died after drinking the beverage.

Monday's lawsuit, which was first obtained by NBC News, alleges that Sarah Katz, an Ivy League student with a heart condition, died after she drank Panera’s Charged Lemonade last year.

A large Charged Lemonade contains 390 milligrams — nearly the 400-milligram daily maximum of caffeine that the Food and Drug Administration says healthy adults can safely consume.