The pill is either administered on a 28-day or 21-day cycle. The 28-day pill is given for each day of the period, 7 of which are really just ‘filler’ pills (placebos) containing no hormones. The purpose of these placebos is to ensure the woman is maintaining the correct schedule of doses. In the 21-day pack, there are 7 days a month in which you do not take a pill, and the woman must remember to resume the dose schedule after the 7 day break. In the last week of the dose schedule there are no hormones ingested, allowing a menstruation which is usually lighter, shorter and less painful than normal. If the pill is going to become an effective birth control method for you then it must become part of your daily routine. One major attribute of the pill is that it is nearly 100% effective when used properly. Real effectiveness is actually about 92-95% due to misuse. You can buy birth control pills through your local pharmacy or online pharmacy. If you willing to order from it online the advantage is Specially you no need prescriptions.