D.H.
Don't worry. If it is making her more comfortable, then it is
beneficial. She will not get "addicted" the medicine although (and this is probably your concern) she will really like getting the sweet taste of it every night. However, if you just stop giving it to her when she no longer needs it, she may not even notice and IF she throws a tantrum because she wants it, just explain that medicine is only for when you have owies ... and she'll move on quickly.