As the Michael Jackson wrongful death trial begins, CNN chief medical correspondent and practicing neurosurgeon Dr. Sanjay Gupta demonstrates how the drug propofol works. Improper usage of propofol is at the center of the trial dispute. Later, Dr. Gupta also discussed propofol with HLN’s Dr. Drew Pinsky. Dr. Pinsky is a practicing physician and is board certified in internal and addiction medicine. Dr. DREW airs nightly on HLN at 9:00pm ET & PT.