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.
Lipitor (Pfizer), Atorvastatin (INN), is a member of the drug class known as statins, used for lowering blood cholesterol. It also stabilizes plaque and prevents strokes through anti-inflammatory and other mechanisms.