What is the best birth control after age 45?

Depends: The answer to this depends on your personal medical and family medical history... Your risk of heart disease, breast cancer, risk for blood clots, smoking status... Please see your doc for a consult.

IUD/Implant: Regardless of your age, blood pressure, family history, or reactions to other birth control, the most effective and safest methods of birth control are long-acting progestin-only methods, such as the implant or the hormonal IUD, which decrease rates of endometrial cancer and decrease bleeding. They're safe, reversible, and don't affect weight gain/mood. They're almost as good as getting sterilized