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.
What is Lipitor? Lipitor (atorvastatin) belongs to a group of drugs called HMG CoA reductase inhibitors, or statins.. Atorvastatin reduces levels of bad cholesterol (low-density lipoprotein, or LDL) and triglycerides in the blood, while increasing levels of good cholesterol (high-density lipoprotein, or HDL).
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.