When an institutionalized shopaholic finds out that the perverse clinical director use his patients as guinea pigs in a medical trial meant to increase consumerism habits, he must fight his addiction to sabotage the experiment and escape from the clinic.

It's a comedy, like dr. strangelove.

What's the genre? Comedy?

what about:

"When an institutionalized shopaholic finds out that the perverse clinical director use his patients as guinea pigs in a medical trial meant to increase consumerism habits, he must fight his addiction to sabotage the experiment and escape from the clinic."

The main problem with this logline is, you have to read it a couple times to understand it.

These phrases are a bit confusing or awkward:

ruined shopaholic
crazy addiction treatment center
serum of mass consumption
regain the civilized world

I would try saying the same thing but in a clearer manner in order to get your story across.