If the homoeopathic syrup is not effective for your daughter's throat, there are a couple of natural alternatives you can try. Two syrups made from natural ingredients, one based on ivy leaves and the other on thyme leaves, have shown effectiveness in calming coughs in studies. You can give these syrups to children over 1 year old, and they can be used up to three times a day. One has a honey flavor that kids usually like, while the other has a slightly less pleasant taste. These may be worth considering to help alleviate your daughter's throat discomfort.