Here is some interesting reading on the subject of Plan B:
Women over the age of 18 can now buy Plan B over the counter and
keep a dose in their medicine cabinet for emergencies.
Is EC Safe?
Use of birth control pills as emergency contraception has been practiced since the 1960s. In fact, the American Medical Association, the American College of Obstetricians and Gynecologists, and the Society for Adolescent Medicine support easier access to EC, asserting that EC is entirely safe for teenage and adult women. Numerous studies of regular use of oral contraceptives (even the older, higher dose preparations) found no increased risk of birth defects. EC is safe enough that it is already available without a doctor's prescription in more than 30 countries around the world.
[W]'hile all of the scientific and medical evidence indicates that the drug is safe for all women of childbearing age, when Plan B was approved for “over the counter” sale, dual status with age restrictions was imposed. As discussed previously, women over the age of 18 can purchase Plan B without a prescription, while women under the age of 18 still need to visit a provider for a prescription before they can access the drug (Kauffman & Stein, 2006). This places additional burdens on young women, who, by the very nature of their age will have a more difficult time accessing Plan B in a timely manner than older women who have access to additional resources. It is also particularly worrisome in light of the fact that the rate of teen pregnancy in the United States ranks highest among industrialized Western nations (NARAL, 2006).
In deciding the case of Plan B’s over the counter status, the Food and Drug Administration deviated from a number of its standard operating procedures and protocols without due cause (Davidoff, 2006). To protect the scientific integrity of the agency from political influence, a thorough review of the events leading up to the three year indecision and the subsequent dual status recommendation of Plan B’s over the counter status is in order.