Hi! From what I know and from what a few of my mum friends shared, most pediatricians say pwede na ng 3-4 months old ang baby to use a pacifier, pero mas okay kung hinihintay mo pa until 6 weeks or after established na ang breastfeeding kung nag-breastfeed ka. Ang importante lang talaga is to introduce it carefully and monitor kung okay lang sa baby, plus siguruhing clean at safe ang pacifier na gagamitin mo!