The reserved powers clause, represented in the 10th Amendment, is that safety valve. Any power not given to Washington, DC, automatically belongs to the states. So try it out: drivers' licenses.
Lipitor is a prescription medicine used to treat high cholesterol levels and to prevent heart disease. Lipitor belongs to a group of drugs called HMG-CoA reductase inhibitors, also known as statins. Lipitor works by blocking the production of cholesterol in the body.
Atorvastatin is also used to decrease the amount of fatty substances such as low-density lipoprotein (LDL) cholesterol ('bad cholesterol') and triglycerides in the blood and to increase the amount of high-density lipoprotein (HDL) cholesterol ('good cholesterol') in the blood.