Why do you need to take the white tables first , for birth control pills ?

To prevent pregnancy: The color is not important. The first 21-24 pills contain hormones to offer birth control. The last 4-7 contain no hormones and you will get your period. Take the medicine as the pack says if you want birth control to be effeti8ve.

Not enough info: Over the years there have been many types on birth control pills and many ways to take them. Some were made to be taken one a day for every day of the month starting with the first day of the period. Usually these were dummy pills, with no hormones or medication, simply to be taken so a person would not forget. Later most of the pills were made to be taken for 21 days sometime causing confusion.