The flow of information can be between two individuals. The information can flow from the individual to a machine, from the machine to the individual and even between two machines. Machines coupled together through networks also provide signals for the individuals to respond, thus a type of communication system.
Lipitor is used to treat high cholesterol, and to lower the risk of stroke, heart attack, or other heart complications in people with type 2 diabetes, coronary heart disease, or other risk factors. Lipitor is for use in adults and children who are at least 10 years old.
The company will launch its own cut-price version-Sildenafil Pfizer-in a bid to retain its market share. Sales of Pfizer's highly profitable drug Lipitor, used to tackle high cholesterol, plummeted to $3.95bn last year from $9.6bn in 2011 after the drug lost its patent protection in November 2011.