Ensysce Biosciences, Inc. engages in developing various prescription drugs for severe pain relief in opioid addiction,misuse, abuse, and overdose in the United States. The company is developing PF614, a TAAP prodrug candidate of oxycodone, which is in Phase II clinical trial for the treatment of acute or chronic pain. It is also developing PF329, an extended-release prodrug of hydromorphone that is similar to PF614; PF8001 and PF8026 are extended. release prodrugs of amphetamine for ADHD medication abuse.