Originally Posted by Nightshade

No, in fact I think the exact opposite in this matter. Stop taking cold medicines and let your body build it's immune system naturally. There is a limit of course but teach your body not to rely on medicine to fix itself, it causes an issue in a SHTF situation when medicine will most likely not be available.

Learn homeopathy and what natural plants that grow in your region look like and how to make them benefit you, buy a book on the subject and not only read it but practice in case the book is destroyed or takes valuable space or weight.