it is okay to wait adjust it by four hours. this will not change the effectiveness. no. its very important to be consistant with the time you take bcp everyday. if you take it at 9pm est normally then set the alarm on your cell phone so it goes off at 9pm est regardless of what time of day it is whereever you are located unless you are moving there permanently its ok if you wait for those extra hours of difference. it will not really have any problem with its effectiveness.
if i'm travelling with a time change should i adjust the time of day to take my birth control pill? . i will be travelling to alaska from florida & with the 4 hour time difference will that affect the effectiveness of my taking the pill. for example i currently take it @ 9pm est but i will be going 4 hours backwards. do i need to adjust & take it @ 5pm or is it okay to wait those 'extra' hours?