Is there an alternative medicine for hardening of the arteries?

There are multiple. There are many alternative choices of medicine for athero. The best and by far both the most effective and safe are the statins. Others including fibrates, Niaspan (niacin) and others. If you are asking if there are any supplements then no. There are lifestyle things you can do including stop smoking, exercise (40 minutes daily, but gtake your time getting to that point) and eat a mediteranian type diet.
Yes. A better question would be an alternative to....? Lipid control, diabetes control, smoking cessation, blood pressure control are all options. There are surgical options for debulking arterial options as well.