I am 54 and have had flu for 3 days. I am managing it with water and paracetomal. My son is 24 and has had flu for 6 days and it has'nt got any better. He has low enegy and can't sleep or eat. What can u suggest? You could both try Echinaforce this is licensed for the relief of colds and flu. If symptoms persist for more than 10 days after starting Echinaforce®, check with your doctor.