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Doctor insights on: How Long Is Flu Contagious After Tamiflu

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How long can you be contagious for tamiflu (oseltamivir) and swine flu?

How long can you be contagious for tamiflu (oseltamivir) and swine flu?

Contagious: Well tamiflu (oseltamivir) is a medicine to trat influenza, so it is never contagious. Influenzae is contagious for as long as the person is shedding virus. Usually 1-2 weeks. ...Read more

Dr. Samuel Graitcer
233 Doctors shared insights

Oseltamivir (Definition)

The brand name is tamiflu (oseltamivir). It is a prodrug, which means it is inactive until metabolized by a person's body into the active form. It blocks neuraminidase, an enzyme in influenza virus; by doing this, it prevents the flu virus from detaching from the host cell and slows the spread of the virus. It comes in a tablet form, as ...Read more


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I got the flu and since monday night I have been taking tamiflu (oseltamivir). Am I still contagious? Am I ok to run errands as long as im cautious around others?

I got the flu and since monday night I have been taking tamiflu (oseltamivir). Am I still contagious? Am I ok to run errands as long as im cautious around others?

Take good precaution: It is hard to say if you are still contagious, maybe not. However it is never a bad idea to take good precautions such as washing hands, stop hand-shaking or hugging, cough in your arm. I don't think you need to quarantine yourself, it sounds like you are feeling pretty good to be running errands ...Read more

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My kids 9&7 & I have had flu since Sunday night and started tamiflu (oseltamivir) Mon night. Are we still contagious on Friday. I don't want my 4monthold sick.

My kids 9&7 & I have had flu since Sunday night and started tamiflu (oseltamivir) Mon night. Are we still contagious on Friday. I don't want my 4monthold sick.

You all still may be: Contagious. Tamiflu (oseltamivir) can shorten the course of the illness symptoms, but your respiratory secretions probably still have some infectious particles. I would still try to keep your other children away from the baby at least until all symptoms are totally gone for 24 hours...and for you and them, good hand washing. Ideally if you have an option of someone else doing the care for the baby, also do that. ...Read more

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7 yr old son diag. W/ flu on sunday. Symp. Began sat. On tamiflu (oseltamivir) since. Now thurs. - still contagious? Pedi. Says he can go back to school fri.

7 yr old son diag. W/ flu on sunday. Symp. Began sat. On tamiflu (oseltamivir) since. Now thurs. - still contagious? Pedi. Says he can go back to school fri.

Discuss with doctor: These are symptoms that require a thorough evaluation by your doctor. Only after obtaining this informstion, can he/she adequately diagnose and treat you. ...Read more

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I had the swine flu. Got tamiflu (oseltamivir) which worked and I feel better no more fever. Today is the fifth day since it started on sat am I still contagious?

I had the swine flu. Got tamiflu (oseltamivir) which worked and I feel better no more fever. Today is the fifth day since it started on sat am I still contagious?

Probably not: The virus is transmitted via water droplets in your coughs/sneezes. If you are not coughing/sneezing etc...And that you took tamiflu (oseltamivir) already, it is not likely that you are contagious now. But, caution is always advised. Cover your coughs/sneezes and wash your hands...
Good luck. ...Read more

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I have the flu and I'm currently on tamiflu (oseltamivir). I have a 5 year old and a 7 week old and I'm concerned for their health. Am I contagious?

I have the flu and I'm currently on tamiflu (oseltamivir). I have a 5 year old and a 7 week old and I'm concerned for their health. Am I contagious?

Flu: You are contagious with a fever and a few days after. Your children would qualify for tamiflu (oseltamivir) to help prevent illness. I also would recommend yearly flu shots. ...Read more

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7 year old flu symptoms since Monday night. Started tamiflu (oseltamivir) Tuesday night. No fever since Wednesday afternoon. All symptoms gone. Still contagious?

7 year old flu symptoms since Monday night. Started tamiflu (oseltamivir) Tuesday night. No fever since Wednesday afternoon. All symptoms gone. Still contagious?

Influenza: Usually a person is contagious for a day before illness starts and contagiousness lasts for 5-7 days after the illness begins. Studies have shown that if Tamiflu (oseltamivir) is started within 48 hours of illness it decreases shedding of the virus by 1 day. ...Read more

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7yearold daughter had flu since Mon. On tamiflu (oseltamivir) since Tues night. Fever gone since Wed. No symptoms left. Still contagious? I have a 4 month old baby.

7yearold daughter had flu since Mon. On tamiflu (oseltamivir) since Tues night. Fever gone since Wed. No symptoms left. Still contagious? I have a 4 month old baby.

Flu: Technically the flu is considered contagious for 5-10 days after the start of symptoms. Basic infection control practices: good hand washing, don't share drinks, utensils, cough or sneeze into a tissue or into your shirt sleeve. Since your 7 yo is no longer symptomatic (no more cough?) then the rest should be easy. ...Read more

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My daughter has had the flu for a week now. Been on Tamiflu (oseltamivir) for 3 days. Temp normal since last night. Still has cold symptoms. She still contagious?

My daughter has had the flu for a week now. Been on Tamiflu (oseltamivir) for 3 days. Temp normal since last night. Still has cold symptoms. She still contagious?

Influenza: Usually when the fever is gone then you are not infectious any longer. However, that does not mean that she is ready for school. After being ill for over a week she need time to recuperate and get her strength back. ...Read more

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Diagnosed w/ Flu B Friday @2pm via nasal test due to minor sore throat. No symptoms since Sat. On Tamiflu since Fri. Still contagious? Flu test wrong?

Diagnosed w/ Flu B Friday @2pm via nasal test due to minor sore throat. No symptoms since Sat. On Tamiflu since Fri. Still contagious? Flu test wrong?

Likely/likely not: Most flu swab tests are more likely falsely negative than falsely positive. Patients are considered potentially contageous for a minimum of a week from first symptoms (soar throat qualifies). ...Read more

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I started tamiflu (oseltamivir) 2 days, almost 3 days ago and I have no fever for 24 hours and I feel fine. Am I still contagious? If so, how long?

I started tamiflu (oseltamivir) 2 days, almost 3 days ago and I have no fever for 24 hours and I feel fine. Am I still contagious? If so, how long?

Up to 7 days: The shedding of the virus in your secretions peaks in the first 3 days of the illness but persists up to 7 days regardless of the use of tamiflu (oseltamivir). While the shedding diminishes as the fever drops, it can persist and the need for isolation depends on the situation. ...Read more

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I got diagnosed with the flu on thurs I had symptoms on tues now I'm taking tamiflu (oseltamivir) how long do you think it will take to go away?

I got diagnosed with the flu on thurs I had symptoms on tues now I'm taking tamiflu (oseltamivir) how long do you think it will take to go away?

3-5 days: The Tamiflu (oseltamivir) will shorten the course of the flu, but it must be taken soon after the onset of symptoms.
You were just the at the border line for that.
Cont with the Tamiflu (oseltamivir) for the course.
Keep pushing fluids as much as possible.

Tylenol or Advil for pain and temp.
See your DR if worsening or high temp ...Read more

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I just finished a course of tamiflu (oseltamivir) for swine flu. How long before I start to feel better?

Can not predict: It depends on how ill you have been, how early in the illness you started the tamiflu, (oseltamivir) whether you have had any complications such as pneumonia, whether the diagnosis was correct, and whether you have any other illnesses you may feel better in a few days, or your recovery may take several weeks. Obviously see you doctor if you do not feel better or if you still have fever. ...Read more

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Got the flu and on tamiflu (oseltamivir). Fever 2 degrees above norm. How long will fever typically last? I did have my flu shot. Tx

Shortens duration: A flu shot may not have been the one for the strain of virus you have. Taking tamiflu (oseltamivir) before can ward of the flu, and if taken right away usually it shortens the duration of symptoms. Feel better! ...Read more

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Woke up with urge to pee with sharp pain in my penis. Never had this. Is pain due to maybe holding pee too long? Pain seems to gone away now. (im taking zpack and tamiflu (oseltamivir) for flu symptoms at moment)

Woke up with urge to pee with sharp pain in my penis. Never had this. Is pain due to maybe holding pee too long? Pain seems to gone away now. (im taking zpack and tamiflu (oseltamivir) for flu symptoms at moment)

Painful urination: Without knowing your activities and intimate preferences, am unable to comment but if you do have discharge from the penis, you should see your local doctor for further evaluation and treatment. ...Read more

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Been on tamiflu (oseltamivir) for influenza a for over 24 hours. Also been over 24 hours since fever. Am I still contagious?

Been on tamiflu (oseltamivir) for influenza a for over 24 hours. Also been over 24 hours since fever. Am I still contagious?

Flu : contagious?: I would give it at least 2 or three days after the fever to go out among your friends and family. Just to be on the safe side. Good luck and feel better ...Read more

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Daughter finished tamiflu (oseltamivir) and been fever free for almost two days, but still feels tired and has awful headache. Is this normal? She still contagious?

Daughter finished tamiflu (oseltamivir) and been fever free for almost two days, but still feels tired and has awful headache. Is this normal? She still contagious?

Post viral syndrome: Not uncommunicative to have these symptoms influenza viruses ravage the immune system as do mono etc. Think of it as body is recuperating after the hurricane is over. ...Read more

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Can my 4 year old take cough medicine and tamiflu (oseltamivir) at the same time? Positive influenza test 4 days ago, lingering cough, fever free 48 hours. Contagious?

Can my 4 year old take cough medicine and tamiflu (oseltamivir) at the same time? Positive influenza test 4 days ago, lingering cough, fever free 48 hours. Contagious?

Yes, most: Over-the-counter children's cough medications can be taken with Tamiflu, (oseltamivir) but the cough medication may not have any added benefit and will not shorten the course. If he/she is still coughing, I would consider him/her to still be somewhat contagious through those respiratory droplets released by the cough, although one is most contagious while the fever is there ...Read more

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How is tamiflu (oseltamivir) for the flu?

How is tamiflu (oseltamivir) for the flu?

Helps some: This helps some patients if it is started soon enough. It works by decreasing viral reproduction, so if you have had it for more than 2 days, there is not much point in starting. (already well established) ...Read more

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My husband was diagnosed with type B flu. What can I do to insure the rest of us don't get it? We've already been exposed. He is on Tamiflu (oseltamivir) now.

My husband was diagnosed with type B flu. What can I do to insure the rest of us don't get it? We've already been exposed. He is on Tamiflu (oseltamivir) now.

Flu prevention: Aside from droplet precaution (hand washing, not sharing cups, covering coughs, etc), Tamiflu (oseltamivir) can also be prescribed as a one daily for 10 days preventative. ...Read more

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Could tamiflu (oseltamivir) work for bird flu?

Could tamiflu (oseltamivir) work for bird flu?

Probably: Tamiflu (oseltamivir) works by stopping the virus from detaching from the host cell in your lung. This stops the virus spreading though the body, and the"bird flu" virus uses a similar mechanism, which appears to be inhibited to similar degree by the drug. ...Read more

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Is tamiflu or relenza (zanamivir) effective for swine flu?

Partly: It may shorten the course of illness by a couple of days if started early in the course of infection. ...Read more

Dr. Michael Gabor
200 Doctors shared insights

Tamiflu (Definition)

Tamiflu is a flu/influenza agent which is a kind of anti-viral ...Read more


Contagious (Definition)

One is able to transmit an infection to another by ...Read more