Final answer:
Plan B, also known as emergency contraception, can be purchased over-the-counter without a prescription in the United States for individuals who are 18 years old or older. For patients younger than 18, a prescription is required.
Step-by-step explanation:
In the United States, Plan B, also known as emergency contraception, can be purchased over-the-counter without a prescription. However, there is an age restriction for its purchase. Plan B can be dispensed to a patient who is 18 years old or older. For patients who are younger than 18, a prescription is required.
This age restriction is in place to ensure that young individuals have access to necessary medical care and counseling when it comes to reproductive health decisions. It is important for younger individuals to consult with healthcare professionals who can provide guidance, answer questions, and ensure their safety and well-being.