Here's another silly movie you can find in the CHILLING CLASSICS 50 MOVIE PACK.
In this Dr. Jekyll and Mr. Hyde rip-off, a college professor learns that the funding for his DNA research is about to be cut off due to lack of results. He decides to use himself as a human guinea pig and injects himself in the eye with an anti-aging serum. The serum causes him to develop a split personality. His second personality is hostile, leading to several murders. He also begins to age rapidly (I guess the damned serum didn't work!) and eventually turns into a man-sized lizard monster that looks like the gekko on the "Geico" insurance commercials.

The only way to enjoy this movie is as a comedy (and even then it isn't very enjoyable).
Best lesson I learned from this movie:
* Leaving a bottle of experimental serum on the fireplace mantle where your preschool-aged son can get his hands on it is a sign of bad parenting.
The stench is still seeping out from my DVD player . . .