When a Post editor woke up with chills and body aches just two days before an important conference, she tried Complete Flu Care from Hyland's. To her surprise, the product relieved symptoms and helped her resume a busy schedule. The quick-dissolving tablets contain several FDA-regulated homeopathic substances and don't expire.

Children's formulations for colds and flu axe also available from the company. The dietary supplement ImmPower may also protect against the flu. Its active ingredient, called AHCC, is a standardized compound made from mushrooms used in traditional Japanese medicine to boost immune function.

These products are available without a prescription at conventional and online stores.