I have been using Echinaforce for the last few years and can say 'I am a fan'. Colds and coughs and sore throats have been kept abay since using it. I recently recommended it to my daughter, who is also now using it. I had read that you could use it as a preventative (a reduced dose) and therefore used it all the time. In the most recent leaflet I read, it stated that it should not be used for more than 8 weeks. Question should I have a break every so often or can I safely use it as a preventative?