Hmm, better check with your pedia on that one talaga, some vitamins are okay on an empty stomach pero iba-iba depende sa type, at mas safe na marinig mo directly from the doctor kung aling vitamins ang pwede para sa age ng baby mo. A few of us mums have noticed na mas better absorbed ng katawan ang vitamins pag may kain na, kaya usually they suggest giving it with breakfast or a meal, pero talagang best to confirm with your doctor para sigurado ka na okay para sa 1 year and 7 months old mo. Good thinking na nag-ask muna before giving!