Tamiflu has been approved for use in adults, infants as young as 2 weeks, children, and pregnant women. Tamiflu does not work as well in patients that are over 65. Tamiflu does not work as well in patients that are over 65. Can I skip the flu shot and take Tamiflu instead? Nope—the drug is not a substitute for early flu vaccination , according to the drug’s manufacturer. Getting a flu shot is the best way to. Tamiflu will not treat the common cold. Tamiflu should not be used in place of getting a yearly flu shot. The Centers for Disease Control recommends an annual flu shot to help protect you each year from new strains of influenza virus. Tamiflu can sometimes keep you from getting the flu if you take it before you get sick. The term flu refers to illness caused by the influenza virus. The flu is a respiratory infection that can. I've also read that they're concerned that the prophylactic (preventitive) use of Tamiflu and other antivirals may contribute to a more virilant strain of H1N1, just like what has happened with the overuse of antibiotics for non-viral purposes (ie, prescribing antibiotics for colds and not viruses). Although Tamiflu can reduce the flu by roughly 1 to 2 days, the flu vaccine is still the best option for fighting flu. A doctor answers your questions about Tamiflu. A doctor answers your. Tamiflu is a prescription medication used to treat influenza, or flu, virus. It can shorten the duration of the flu if taken as soon as symptoms start. How to use Tamiflu. Read the Patient Information Leaflet if available from your pharmacist before you start taking this medicine. If you have any questions, consult your doctor or pharmacist.