Meds

One hot summer day, a man in a business suit running wildly down a busy street attacks a woman and her toddler, neither of whom have ever seen him before... As he waits in his pickup truck for his wife to finish shopping, a man decides to take the shotgun off its rack, go inside the mall, and open fire on total strangers... While waiting to see her doctor, a woman takes a knife from her purse and begins stabbing others in the waiting room.

Something is making people become violent and murder...