Mama, since ang pedia mo na ang nag-prescribe ng Tiki-Tiki from weeks ago, mas safe talaga na i-stick mo muna yun or ask your pedia first before switching to Nutrillin, kasi alam niya ang full health picture ng baby mo! Both are good brands naman, pero every baby's needs are different, at baka may specific reason kung bakit Tiki-Tiki ang pinili niya initially. A few of us moms tried switching vitamins without asking first at ang babies namin naging slightly upset sa tummy, so better safe than sorry. Just text or call your pedia, usually okay lang sila sa tanong ganyan, at if pwede mag-switch, at least you'll know exactly how to do it. Good luck mama!