Even if you are unable to get these medications, by recognizing the early signs and symptoms of flu, you can act quicker—not only getting the bed rest you need, but to take steps to prevent the spread of infection to others.
Symptoms
Spotting the early signs and symptoms of flu can help you seek treatment that can shorten the course of an infection. The most common early symptoms are:
Sudden high fever (over 100. 4 degrees F) Chills Generalized muscle aches Malaise (a general feeling of unwellness) Tiredness Headache (usually extending across the forehead and behind the eyes)
Once full-fledged acute symptoms develop, there is really nothing you can do other than rest and let the disease run its course.
Causes
The flu is caused by a family of viruses that affect the respiratory system. Unlike colds, which can be caused by any number of different viruses (including rhinoviruses, adenoviruses, and coronaviruses), flu is caused exclusively by influenza viruses (designated as influenza type A, B, C, or D).
When flu symptoms first develop, it may be hard to differentiate them from the early signs of a cold. But, there are a few key ways to tell them apart.
Flu viruses almost invariably have a shorter incubation period, meaning that symptoms tend to develop fast and furiously, usually within a day or so. Because of this, the immune system will respond more aggressively, flooding the body with inflammatory compounds to help neutralize the virus.
This aggressive immune assault will manifest with symptoms that are usually more severe and/or less characteristic than the common cold.
The incubation phase is the time following exposure before symptoms first appear. It is during this phase that the virus will actively replicate and, by doing so, trigger the release of defensive proteins called cytokines. Cytokines are pro-inflammatory, meaning that they spur the body to generate inflammation so that tissues and blood vessels can swell to accommodate larger immune cells (known as monocytes).
After the prodromal phase is the acute phase, which lasts for around two to three days with all of the “classic” symptoms of flu. Most flu symptoms will disappear after about a week, but a cough may persist for up to two weeks.
Diagnosis
The flu can usually be diagnosed by symptoms alone, particularly during flu season. This is especially true with the prodromal flu symptoms, during which treatment will often be dispensed presumptively. Even if a rapid influenza diagnostic test (RIDT) is available, the test is not all that sensitive and can regularly return false-negative results.
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To prevent complications and the further spread of infection, certain prescription flu medications can be dispensed over the phone by a doctor or a telehealth physician without a face-to-face meeting.
Treatment
Unlike the common cold, for which there are no drug treatments, the flu can be shortened by a day or two if certain antiviral drugs are taken within 24 to 48 hours of the first appearance of symptoms. The drugs work by slowing the replication of the virus and, by doing so, potentially reduce the length and severity of the illness.
Even so, the drugs don’t always work, often because people miss the early signs and get treated too late. If not taken within the first 24 to 48 hours, the drugs will likely be of any benefit.
The four antiviral treatment options approved by the U.S. Food and Drug Administration (FDA) are:
Rapivab (peramivir), approved for adults and children 2 years and up Relenza (zanamivir), approved for adults and children over 7 years Tamiflu (oseltamivir), approved for adults and children over 12 months Xofluza (baloxavir marboxil), approved for adults and children over 5 years
For people that are at high risk of flu complications (including young children, the elderly, pregnant women, and people with chronic health conditions), taking an antiviral drug can mean the difference between being hospitalized and recovering at home.
A Word From Verywell
The best way to deal with annual flu outbreaks is to avoid infection. The most effective strategy for doing so is getting an annual flu shot or FluMist (the nasal spray flu vaccine). The Centers for Disease Control and Prevention (CDC) recommends annual influenza vaccination for everyone 6 months and older, ideally by the end of October.
Rapivab (peramivir)Relenza (zanamivir)Tamiflu (oseltamivir)Xofluza (baloxavir marboxil)
Antiviral medications work best if taken in the first 48 hours after symptoms begin.
Over-the-counter cold and flu medications can help to relieve symptoms, but they don’t shorten the course of the illness. Combination flu medications sold over the counter typically contain an analgesic, cough suppressant or expectorant, an antihistamine, and decongestants.
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