Reports are now starting to confirm that MJ’s death was most likely caused by a large dosage of Demerol: That is exactly what a source told The Sun happened shortly after Jackson was administered an injection of the drug. “Demerol has a tremendous amount of side effects,” Dr. Patrick Annello, an anesthesiologist and pain management specialist at St. Francis Hospital on Long Island told FOXNews.com. “It can cause rapid heart rate, arrhythmias — and given in high enough doses — it can cause respiratory depression or shallow breathing.” “After taking the Demerol, he started to experience slow, shallow breathing,” the...