Imortalon

It was possibly the discovery of a lifetime: a drug that would reverse the effects of aging, seemingly indefinitely. The tests were all positive, first on rats, then monkeys and other large animals, and finally, on humans. It was a dream come true, the promise of a healthy, happy life, with all the benefits of the young, including energy, vitality, and sex drive, for 200+years or more. Tens of millions clamored to be among the first to take the drug.

The FDA approved the drug in record time. Unfortunately that was before anyone found out about the headaches, the uncontrollable rage, and the suicides...the dream became a nightmare