The medicine contains 3 main ingredients, which are acetaminophen, caffeine and butalbital. Butalbital is a productive barbiturate and can reduce muscular tension. Apart from releasing muscle contractions, butalbital can generate a feeling of complete relaxation and reduce symptoms of anxiety. Caffeine increases the flow of blood throughout the body, which in turn, alleviates headache pain. In addition, acetaminophen works as a potent pain reliever.