Statin drugs, now widely prescribed for cholesterol-clogged arteries, can cause liver damage and other nasty side effects, as do conventional drugs routinely used for a range of chronic conditions. Nano-delivery mechanisms will reduce not only this collateral damage by reducing dosages and precisely targeting therapies, but also will reduce the cost of drugs, which now staggers the baby-boomer-laden US health care system — although the cost of drug delivery could rise to offset those savings to some degree.