Ive been taking tarina fe 1/20 birth control pills for about a year. does the pill become less effective if i take it like a few minutes before and/or after? an example like if my time is usually at 9 i take it at 9:30 sometimes i forget?

If the oral low dose bcp (Tarina Fe, for example) is taken punctually, within the hour of the previous day's active pill, breakthough bleeding can be avoided. "Missing" an active pill by 30 minutes will not alter the effectiveness. Starting the new pack should occur no later than the next day after the placebo pills are finished, if this interval is missed, pregnancy may occur.