SAN FRANCISCO (AP) — A new government survey suggests the number of people seeking emergency treatment after consuming energy drinks has doubled nationwide during the past four years.

From 2007 to 2011, the government estimates the number of emergency room visits involving the neon-labeled beverages shot up from about 10,000 to more than 20,000. The report calls energy drink consumption a “rising public health problem” that can cause insomnia, nervousness, headache, fast heartbeat and seizures that are severe enough to require emergency care.

Several emergency physicians said they had seen a clear uptick in the number of patients suffering from irregular heartbeats, anxiety and heart attacks who said they had recently downed an energy drink.