Question 1

is it possible to have an allergic reaction to amoxicillin after using it several times previously? i'm on day 4 of  875mg/2x daily and today i am breaking out in hives. what should i do?

Accepted Answer

Yes: Even though you have used Amoxicillin previously, you can develop an allergic response at any time in the future.  You should stop the medicine and call your doctor.

Question 2

is it possible to develop an allergic reaction to an antibiotic while you're taking it? i'm on my second week of amoxicillin and this morning woke up with red bumps all over.  i break out in hives with penicillin and sudafed which is why i ask.

thanks.

Accepted Answer

Amoxicillin : Amoxicillin is very closely related to penicillin.  People with a true penicillin allergy like you (causing hives) should not take amoxicillin.  I would suggest stopping the medication and calling your doctor right away to find out what to do next. You may need medication to stop the allergic reaction and perhaps a different antibiotic, depending on the reason it was prescribed.

People have been known to show allergic symptoms after taking antibiotics for several days and even if they have taken the same antibiotic before and have not had problems.

I hope this answers your question.  Thanks!

Question 3

baby on amoxicillan for double ear infection broke out in rash on day 7.. is this allergic reaction? older daughter had hives on day 10..worried.

Accepted Answer

Drug allergy: Penicillin and Amoxicillin allergy are common and the most common symptom is rash including hives.  The rash can start while taking the medication or even within days after stopping it.  Other reasons for hive like rashes are possible including infectious rash from strep or virus.  There is a skin test for penicillin allergy that an allergist can perform if necessary to sort it out.

Question 4

my son was given amoxicillin had hive reaction to it. he was switched to cefdinir. he continues with hives. does this mean he's also allergic to this?

Accepted Answer

MGt: The allergic reaction to Amoxicillin can still be the cause of this rash, but a new drug allergy is also possible. He should be treated with an antihistamine. Is he experiencing any respiratory problems? If so, please see the ED right away. It is important to contact your PCP.

Question 5

can amox-clav cause small amount of hives? and should i be worried? i've taken amoxicillin before with no reaction. i'm already allergic to levaquin (levofloxacin).

Accepted Answer

Hives: Any medication can cause hives. If you think the medicine is the cause of the hive it should be stopped immediately.  Allergic reactions happen on subsequent exposures to a medication and not usually on the first exposure.  Stop the medicine, take antihistamines.  Report the reaction to your doctor.  Seek immediate care for shortness of breath, facial swell, trouble swallowing.

Question 6

allergic reaction our 8 year old daughter was placed on amoxicillin antibiotic by one of her doctors for 10 days for throat infection/fever.  on or about the 10th day; she woke up with hives, left eye swollen shut, red marks through out her body.  we took

Accepted Answer

It : It is not uncommon for people to develope allergies toward the end of a course of antibiotics.  Your story is fairly typical.  Your daughter has had a pretty bad allergic reaction to penicillin and should never get penicillin or Amoxicillin ever again.

Question 7

i had an allergic reaction to amoxicillin. what are my options?

Accepted Answer

Depends: That depends on what kind of infection you're treating.

Question 8

how long does a rash from an allergic reaction to amoxicillin typically last?

Accepted Answer

Days: Usually a few days to week. Rarely over a month.

Question 9

how rare is a bad allergic reaction to amoxicillin, like life threatening such as anyphilaxis? should i be concerned? scared to take my first dose?

Accepted Answer

: Allergic reaction to amoxicillin can be fatal. Have your doctor know of your concerns, past history and be tested for possible allergy or change in medication. If no known past reactions, than you should be able to take this drug.

Question 10

son had allergic reaction to amoxicillin, full body rash, stopped meds, rash cleared up 6days ago, but now it looks like its coming back what, to do?

Accepted Answer

Seek wisdom: Rashes are a large part of pediatric care. Common dilemma is that viruses often cause harmless rashes (exanthums), but drugs used to treat secondary ear infections, sinusitis, etc. can be serious. Appearance, timing of rash is important. Recognition by a seasoned provider can be enormously reassuring. Allergists are called upon for diffucult rashes and can test for certain drug allergies.

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Doctor answers about:

Allergic reaction to amoxicillin hives

A member asked:

Is it possible to have an allergic reaction to amoxicillin after using it several times previously? i'm on day 4 of 875mg/2x daily and today i am breaking out in hives. what should i do?

A member asked:

Is it possible to develop an allergic reaction to an antibiotic while you're taking it? i'm on my second week of amoxicillin and this morning woke up with red bumps all over. i break out in hives with penicillin and sudafed which is why i ask. thanks.

A member asked:

Baby on amoxicillan for double ear infection broke out in rash on day 7.. is this allergic reaction? older daughter had hives on day 10..worried.

A member asked:

My son was given amoxicillin had hive reaction to it. he was switched to cefdinir. he continues with hives. does this mean he's also allergic to this?

A member asked:

Can amox-clav cause small amount of hives? and should i be worried? i've taken amoxicillin before with no reaction. i'm already allergic to levaquin (levofloxacin).

A member asked:

Allergic reaction our 8 year old daughter was placed on amoxicillin antibiotic by one of her doctors for 10 days for throat infection/fever. on or about the 10th day; she woke up with hives, left eye swollen shut, red marks through out her body. we took

A member asked:

I had an allergic reaction to amoxicillin. what are my options?

A member asked:

How long does a rash from an allergic reaction to amoxicillin typically last?

A member asked:

How rare is a bad allergic reaction to amoxicillin, like life threatening such as anyphilaxis? should i be concerned? scared to take my first dose?

A member asked:

Son had allergic reaction to amoxicillin, full body rash, stopped meds, rash cleared up 6days ago, but now it looks like its coming back what, to do?

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