Choose a backup method of birth control (such as condoms, diaphragm, or foam) to use with your first pack of pills because the pill may not fully protect you from pregnancy during the first week that you start taking them. Keep this backup method handy and use it in case you:
Run out of pills
Forget to take your pill
Discontinue pill use
Need protection from transmission of sexually transmitted diseases, particularly the virus that causes AIDS (the condom is recommended)
There are several ways to start taking your pills. Use one of the following approaches:
First approach: Start your first pack of pills on the day your period begins.
Second approach: Start your first pack on the first Sunday after your period begins. This will result in your menses almost always beginning on a Tuesday or Wednesday every 4 weeks
Third approach: Start your first pack on the fifth day after your period begins.
Fourth approach: Start your pill today if there is absolutely no chance that you could be pregnant. Use a backup method of contraception until your first period.
Take one pill a day until you finish the pack. Then:
If you are using a 28-day pack, begin a new pack immediately. Skip no days between packages.
If you are using a 21-day pack, stop taking pills for 1 week and then start your new pack.
Try to associate taking your pill with something you do at about the same time every day, like brushing your teeth in the morning, eating a meal, or going to bed. Keep the pill near the place where you engage in the selected activity. Establishing a routine will make it easier for you to remember. The pills work best if you take one at about the same time every day. Check your pack of pills each morning to make sure you took your pill the day before.