Many new parents (and some experienced ones, too) are uncertain about how to give medicine to babies and young children. The secret is believing that the child needs the medicine. A child can sense any doubts in your mind and will resist no matter what you do, unless you sincerely believe you're doing what is best. Be confident and determined. If you aren't convinced the medicine is necessary, talk to your child's health care provider first, rather than trying half-heartedly to get it into your child.
Read Just a Spoonful of Sugar: Tips for Giving Medicine to Kids