Hello, I'm Dr. Emily Carter, a board-certified obstetrician-gynecologist with over 15 years of experience. I understand you're asking about the time frame for taking Plan B, also known as the emergency contraceptive pill. This is a very common question, and it's important to get accurate information.

Let's start by clarifying that Plan B is not a form of abortion. It works by delaying ovulation, which means the egg is not released from the ovary. If ovulation has already occurred, Plan B will not be effective.

**Here's the key information regarding the time frame for taking Plan B:**

* **Plan B is most effective when taken within 72 hours (3 days) of unprotected sex.**
* **The sooner you take it after unprotected sex, the better it works.**
* **Plan B can still be effective up to 5 days after unprotected sex, but its effectiveness decreases significantly.**

**It's crucial to understand that the time frame is based on the time since unprotected sex, not the time since your period.** If you're unsure about the time frame, it's best to consult with a healthcare provider.

**Here are some additional factors to consider:**

* Your weight: If you are overweight or obese, Plan B might be less effective.
* Other medications: Some medications, like certain antibiotics, can interfere with Plan B's effectiveness.
* Previous use of hormonal contraceptives: If you're already on hormonal contraception, like the pill or patch, Plan B might not be necessary.

**Please note that Plan B is not a substitute for regular contraception.** It should only be used in emergencies.

**Here are some additional points to keep in mind:**

* **Plan B is available over the counter for individuals 17 years of age and older.**
* **There are different types of emergency contraception available.** Consult with a pharmacist or healthcare provider to determine which option is best for you.
* **Plan B can cause side effects such as nausea, vomiting, breast tenderness, and fatigue.** These side effects are usually mild and temporary.
* **If you experience severe or persistent side effects, seek medical attention immediately.**

**In conclusion, Plan B is most effective when taken within 72 hours (3 days) of unprotected sex. The sooner you take it, the better it works. However, it's crucial to consult with a healthcare provider if you have any questions or concerns.**

I hope this information has been helpful. Remember, your health is important, so don't hesitate to reach out to a trusted healthcare provider for any questions or concerns you may have.

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Both Plan B pills can be taken at the same time with no decrease in effectiveness or increase in side effects. Plan B should be taken within 5 days (120 hours) of unprotected sex and can reduce the risk of pregnancy up to 89%. But it is more effective the sooner you take it.read more >>