Recommendations for missed oral contraceptives

• Oral contraceptives are usually started on the first or fifth day of your menstrual period or on the first Sunday after or on which bleeding begins. You need to use another method of birth control during the first 7 to 9 days that you take your oral contraceptive and the doctor will help you choose a method.
• If you vomit or have diarrhea while you are taking an oral contraceptive, you should use a backup method
• For missed doses, refer to the chart below:

references:

1. Missed Hormonal Contraceptives: New Recommendations. – Committee opinion. J Obstet Gynaecol Can. 2008 Nov;30(11) :1050-77.