In a moment of desperation, a parent will call medicine anything other than what it is in an attempt to coerce a reluctant child to take it. The last thing you want to do, however, is tell a child that you’re giving her "candy" or a "treat" when she’s being given medication. That will only create confusion that could have tragic implications later. Be clear about what medication is, why it’s used and that it should never be taken unless it’s administered by an adult.
If nothing you try seems to have any effect on your child’s willingness to cooperate, it may be time to contact his pediatrician in order to make more reliable arrangements for treatment. She may also be able to provide you with alternatives to oral medications you can administer at home, or have other ideas regarding ways to encourage your child to take the medicine he needs.