Wesleyan University said at least 11 students were hospitalized with symptoms of overdoses on the drug known as Molly. Dean Michael Whaley, vice president of student affairs, said in a letter to the campus that a sophomore was in critical condition at Middlesex Hospital on Sunday. Middletown police said two patients at Hartford Hospital had been elevated to critical condition, and two were in serious condition. The university says it is aware of 11 students being treated for overdose symptoms consistent with the use of Molly, a stimulant psychoactive drug also known as methylone. Whaley said Middletown police, university police and residence officials are investigating. He asked students to check on their friends.