Top
20
Doctor insights on: I Have Rash After I Take Penicillin Is This Allergy

Share
1

1
I have rash after I take penicillin ... Is this allergy ?

I have rash after I take penicillin ... Is this allergy ?

Maybe: Rashes after antibiotics are often from an allergy to the medication. But often viral infections and even strep throat can cause a rash and if antibiotics were given for strep (or an ear or sinus infection while the person has an underlying viral infection), the rash might be from either the antibiotic or the infection. There are skin tests that is very reliable for penicillin allergy. ...Read more

See 1 more doctor answer
Dr. John Chiu
2,586 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


2

2
How long does a penicillin allergy rash take to clear?

How long does a penicillin allergy rash take to clear?

Up to 30 days: Drug allergies can resolve in a few days and may persist for several weeks until the residual penicillin by products are cleared from body. ...Read more

3

3
How long does it take a rash due to a penicillin allergy to clear?

How long does it take a rash due to a penicillin allergy to clear?

< 7 - 10 days: Antibiotics like penicillin can cause different types of rashes that can vary in how long they persist. The classical true penicillin allergic rash is hives and once the penicillin is stopped usually resolves in less than 7-10 days. Occasionally this can trigger more prolonged hives. Other rashes from penicillin not due to true allergy would include small red bumps that usually lasts < 1-2 wks. ...Read more

See 1 more doctor answer
7

7
How do I know when will my penicillin allergy rash go away?

How do I know when will my penicillin allergy rash go away?

A week or so: It takes about a week or so if it is indeed caused by penicillin. Amoxicillin often causes a skin rash when used for a viral infection. ...Read more

See 1 more doctor answer
8

8
Is there a particular type of rash associated with penicillin allergy?

Is there a particular type of rash associated with penicillin allergy?

Measles-like: Most rashes with penicillin are "morbilliform" or measles-like. More serious penicillin allergy may result in hives (itchy, patchy swellings in the skin) or angioedema (swelling of the lips, eyelids, hands or feet). There are other kinds of rashes that can occur, some of which are serious, and some of which are not. Your personal doctor or an allergist can help you decide. ...Read more

See 1 more doctor answer
9

9
Blood allergy test negative to p. chrysogenum, always told im allergic to penicillin. I even had rash with ceftriaxone. How to interpret this?

Rash may be viral: You may have not had a true allergic rash to the cephalosporin, but rather possibly a drug rash associated with the underlying viral illness that you were being treated for with antibiotics. Either way, there are other choices; for now, it seems reasonable to state allergy to penicillins and cephalosporins until such time that you may actually needs them, and then we can do challenge testing. ...Read more

10

10
Had reaction/rash day 5 of ceftriaxone. Told whole life i had penicillin allergy, but doc thought id be ok. Can u clarify if these 2 meds are related?

Had reaction/rash day 5 of ceftriaxone. Told whole life i had penicillin allergy, but doc thought id be ok. Can u clarify if these 2 meds are related?

Maybe related...: It is likely ceftriaxone is responsible, assuming no other obvious cause (discuss w/ your doctor). Ceftriaxone and penicillin are chemically related, but still your doctor is correct that the risk is little or no higher for ceftriaxone in people with past penicillin reactions. But with this reaction, probably best to continue to avoid both pen and ceftriaxone (and other cephalosporins) in future. ...Read more

See 1 more doctor answer
12

12
On augmentin875 forStrep(no result yet).Day2 no-itch rash w/tiny red bumps covers low back&stomach.No prior penicillin allergy. Is it allergy or other?

On augmentin875 forStrep(no result yet).Day2 no-itch rash w/tiny red bumps covers low back&stomach.No prior penicillin allergy. Is it allergy or other?

Mono rash?: The rash may indicate an allergic reaction to the antibiotic your are taking. You should bring this to your doctor's attention. Strep pharyngitis and infectious mononucleosis have similar presentations. Not uncommonly when mono is treated with a penicillin type medication the patient may develop a non-allergic rash which could be another explanation for the rash described in the question. ...Read more

13

13
How long do penicillin allergy hives take to clear?

How long do penicillin allergy hives take to clear?

Varies: Hives due to drug allergy usually improve within a day or two of stopping the medicine but can last as long as a week or two. It is best to call the doctor to determine what treatment is needed. ...Read more

14

14
Can you take cefaclor if you have a penicillin allergy?

Can you take cefaclor if you have a penicillin allergy?

See below: Depends on your pcn allergy 2-3 % cross allergy usually ok be careful if you have a bad reaction to pcn. ...Read more

15

15
What antibiotics do you take if you have a penicillin allergy?

Lots of Options: Depends on the infection. Certain infections call for different antibiotics. Penicillin drugs are usually first line for most problems, however there are alternatives that can be used. Your doctor would be the best person to talk about what options are right for you. If you are interested in determining if you still have a penicillin allergy, see an Allergist for penicillin skin testing. ...Read more

16

16
Can I take ampicillin if I have an allergy to penicillin? Thanks in advance.

Can I take ampicillin if I have an allergy to penicillin? Thanks in advance.

No: If you are truly allergic to PCN then Ampicillin is closely related. I would recommend seeing an allergist to evaluate your PCN allergy. Many people who think or were told they are allergic actually are not. Even among people who were allergic many lose their sensitivity over time. ...Read more

17

17
Can i take cephalosporin antibiotics if I have allergy on penicillin ?

Can i take cephalosporin antibiotics if I have allergy on penicillin ?

Usually yes: >90% of the people allergic to penicillin would have no problem with cephalosporin. The newer the generation, the less likely the reaction. But if you had an anaphylactic reaction to penicillin, then you should consult an allergist . Do note that many people do lose their penicillin allergy after a few years spontaneously. ...Read more

18

18
What can you take if you have a penicillin allergy?

What can you take if you have a penicillin allergy?

Skin testing: 90% of pt labelled as PCN allergic are not PCN allergic. PCN skin testing and possible oral challenges can be done to clarify this reported sensitivity. ...Read more

See 1 more doctor answer
19

19
What can I take instead of penicillin if I have a penicillin allergy?

What can I take instead of penicillin if I have a penicillin allergy?

Depends: That depends on what's infected. The choice of antibiotics is dependent on the type of infection. ...Read more

20

20
What kind of antibiotics i can take if I have allergy on penicillin ?

What kind of antibiotics i can take if I have allergy on penicillin ?

Many choices: Like me, I am allergic to penicillin. There are other choices which are directed to what is being treated. You have macrolides, lincosides, tetracycline, quinolones, sulfa, etc. Depending on what they are needed for. ...Read more

Dr. John Chiu
2,622 doctors shared insights

Skin Rash (Definition)

A skin rash is a symptom in which a person has changes on part or all of his skin, such as color changes, bumps, blisters, oozing, peeling, ...Read more


Dr. Cornelia Franz
1,059 doctors shared insights

Rash (Definition)

A rash is a change to skin condition which can affect color, appearance, or texture. It may or may not ...Read more