The following is a list from the COR of common children’s medicines that are Kosher for Pesach:
Advil Children’s Suspension – All Flavors
Advil Infants’ Drops – Grape
Advil Junior Strength Coated Tablets
Benadryl Children’s Allergy Liquid and Dye-Free Liquid – All Flavors
Enfamil D-Vi-Sol Drops, Fer-In-Sol Drops, Poly-Vi-Sol Drops, Poly-Vi-Sol Drops with Iron, Tri-Vi-Sol Drops – OU
Kosher-Meds Children’s Ibuprofen Suspension – Berry Flavor – OU
MiraLax Powder
Motrin Children’s Suspension – All Flavors [NOT Motrin Infants’ Drops]
Sudafed PE Children’s Nasal Decongestant – Berry
Sudafed PE Children’s Cold & Cough – Grape
Tylenol Children’s Cold + Cough + Runny Nose Liquid
Tylenol Children’s Cold + Cough + Sore Throat Liquid
Tylenol Children’s Suspension – All Flavors
Tylenol Infants’ Suspension – All Flavors