I also got similar and just tried, we are posting within minutes. -- The median lethal dose (LD50) of caffeine in humans is estimated to be 150–200 milligrams

I also got similar and just tried, we are posting within minutes. -- The median lethal dose (LD50) of caffeine in humans is estimated to be 150–200 milligrams per kilogram of body mass. However, the lethal dose can vary depending on a person's sensitivity to caffeine, and can be as low as 57 milligrams per kilogram. Route of administration LD50 Oral 367.7 mg/kg bw Dermal 2000 mg/kg bw Inhalation LC50 combined: ca. 4.94 mg/L The FDA estimates that toxic effects, such as seizures, can occur after consuming around 1,200 milligrams of caffeine. There was a table in the middle there.