How does one take laxatives properly with birth control pills? Hi. I have this weight loss laxative tea containing senna and i took it 7pm 3 hours after i took my birth control pills. The website where i got the tea warned "Yes, the teatox can potentially reduce the effectiveness of birth control if you take your pill within 4-5 hours of the laxative effect." the next day i took my pill 4pm as usual and 20 min later i went to the bathroom. Was it possible that i have pooped my pill out?? It wasn't watery bowel movement it was normal. Also does this affect the effectiveness of my pill?