Boleh je, a few of my mum friends complained about this when they first started, some said tidur jadi kurang nyenyak or terbangun tengah malam. Tapi biasanya ia settle down after a few cycles, so jangan panic dulu lah. Kalau memang persistent and affecting your sleep quality, best to check with your doctor or pharmacist because they boleh suggest alternative pills or timing yang lebih suitable untuk you.