Octal - See also. 1  Computer numbering formats. 2  Octal games, a game numbering system used in combinatorial game theory. 3  Syllabic octal, a specific octal representation of 8-bit syllables.
Your doctor or nurse will suggest 1 of the following methods to begin taking the pill: Start your first pack of pills on the first day of your menstrual period. Use a backup method of birth control (such as condoms with spermicide) until you start the pill.
This is a Sunday start package. The first pill should be taken on the first Sunday after the menstrual period begins. If your period begins on Sunday, begin taking the pills that day. Take one pill at about the same time each day for 21 consecutive days.