This homeopathic remedy is the choice of treatment for the early stages of a cold or flu.

Take when sudden symptoms appear of fever, colds, chills, headaches and sore throat. It is especially effective in the acute situation of caused by exposure ti cold dry winds, or if the person is frightened, or worse after dark.

The dose is 4 drops hourly for 4-8 doses. Aconite is normally only used in the first 12-24 hours.

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http://www.isbellmedicalpractice.com/handouts/Colds%20and%20Flu.pdf