Ay, sis, this is actually a real concern kaya please check with your doctor or OB first, they know your specific pills and health situation best, kaya importante talaga! Some slimming products can interfere with how your body absorbs birth control, so better safe than sorry, diba? One of my mum friends had the same worry, and her OB gave her specific guidance based on what she was taking. Your doc can tell you exactly which ones are okay together or kung kailangan mo i-adjust ang timing. Sending you peace of mind, you're being smart to ask!