 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  you miss pills, start a new pack late, or take your pill at a different time of the day than usual. Vomiting or diarrhea can prevent your birth control pills from working well. If you have vomiting or diarrhea, you may need to use a back-up birth control method (such as condoms, spermicide). Follow the directions in the Patient Information Leaflet and check with your doctor or pharmacist for more details. Your pill pack contains 24 pills with active medication (with hormones). It also contains 4 reminder pills (without hormones) at the end of the pack. Take one active pill (with hormones) once daily for 24 days in a row. After you have taken the last active pill, take a reminder pill (without hormones) once daily for 4 days in a row unless otherwise directed by your doctor. You should have your period within 3 days after you take the last active tablet in the cycle during the fourth week of the pack. After you have taken the last inactive tablet in the pack, start a new pack the next day whether or not you have your period. If you do not get your period, consult your doctor. If this is the first time you are using this medication and you are not switching from another form of hormonal birth control (such </s>