( CNN ) Ten students at Connecticut 's Wesleyan University and two visitors were hospitalized Sunday from `` complications '' arising from the use of the drug Molly or alcohol . The Middletown Police Department reported that 11 were hospitalized because of Molly and one because of alcohol . Four people remained in the hospital Monday , including two in critical condition , according to police . University President Michael S. Roth described Molly as a refined form of MDMA with `` extremely dangerous '' effects . MDMA is the active ingredient in the drug Ecstasy . But according to the Drug Enforcement Administration , most often Molly is not MDMA , but a toxic mixture of lab-created chemicals . 9 things everyone should know about the drug Molly . `` I ask all students : Please , please stay away from illegal substances the use of which can put you in extreme danger , '' Roth wrote in a letter to the community . `` One mistake can change your life forever . '' The chemicals in Molly are made to mimic the effects of MDMA ; most of them are central nervous system stimulants that cause euphoric highs . They can also cause a rapid heartbeat , high blood pressure , blood vessel constriction and sweating , and can prevent the body from regulating temperature . Some of the chemicals have been reported to cause intense , prolonged panic attacks , psychosis and seizures . `` I just do n't really know how to feel right now . It 's very shocking , '' Wesleyan student Lisa Shepard told CNN affiliate WFSB . `` It 's to be expected from a college environment , but it is disappointing to know that people are exposed to these kind of dangerous drugs . '' According to the affiliate , police were interviewing people at a coed group house at the university . Some students told WFSB that the drugs were allegedly taken at a party at that location . CNN 's Jean Casarez , Drew Griffin . Nelli Black and Patricia DiCarlo contributed to this report .
11 people are hospitalized for poisoning from Molly , and another for drug - related poisoning . It is a synthetic drug with dangerous effects .