medicine for 1 year old

Savannah • Married to the love of my life ❤ 22 years young😁

my niece is 14 months and she hasnt pooped all day. Im guessing its cause were switching her to milk. but we got these pills and didnt realize it's for 2 to 6. can I just give her half a pill? we live in the country so cant really make a trip back.