I have seen so many posts asking about common side effects of Plan B, it concerns me. There is a pamphlet in the package that explains common side effects and what you can expect with Plan B. The fact that so many women are taking this pill without bothering to read the information provided, concerns me. This means these women are putting a chemical into their bodies without the slightest clue what it will do. C'mon ladies, take charge of your health and educate yourself, know what you are putting in your body and what may happen as a result! There is information for days out there! More information on women's health than has EVER been available, USE IT! Don't blindly assume anything when it comes to your health and your body. Rant over....