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Doctor insights on: Is It Dangerous To Eat Moldy Bread If You Have A Penicillin Allergy

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Is it dangerous to eat moldy bread if you have a penicillin allergy?

Is it dangerous to eat moldy bread if you have a penicillin allergy?

No: Most mold on bread is rhizopus, not penicillium, and would not cause a reaction in those with allergy to the drug penicillin. There have been a few penicillium molds producing penicillin found in some sausages and cheeses, but generally, there probably is not enough penicillin to cause a reaction, since this is almost never seen. The usda recommends that moldy breads be discarded for everyone. ...Read more

Penicillin Allergy (Definition)

Penicillin allergy can be classified as an ige mediated immediate immune reaction in which a patient develops an allergic reaction to the break-down products of penicillin leading to allergy cell activation and mast cell release within 30 minutes to a few hours or it can be a delayed t cell mediated immune reaction in which patients develop a skin rash days after being ...Read more


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Can you eat bleu cheese if you have a penicillin allergy?

Can you eat bleu cheese if you have a penicillin allergy?

Not the same: The color of bleu cheese is not produced by penicillium, although imagine that if it sat around long enuf and became contaminated this could grow on it. ...Read more

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If a person has penicillin allergy, is it safe to eat roquefort, blue, or gorgonzola cheese? Does the mold in the cheese make penicillin?

If a person has penicillin allergy, is it safe to eat roquefort, blue, or gorgonzola cheese? Does the mold in the cheese make penicillin?

Great question: Reactions to penicillin in foods eaten by persons allergic to penicillin are rare - perhaps 10 cases in past 25 years worldwide. Cases involve eating meat from an animal given penicillin before slaughtering. I found no cases attributed to the cheeses listed. They use a different species of the genus penicillium to add flavor. Also many persons who think they are penicillin allergic are not. ...Read more

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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

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

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

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Can you still be treated for most infections if you have a penicillin allergy?

Can you still be treated for most infections if you have a penicillin allergy?

Yes: Despite increasing antibiotic resistance, there usually is another antibiotic that can be found. If this is not the case, and there is a serious need for penicillin, many penicillin allergies can be desensitized. This procedure takes place in the hospital and only lasts for the duration of time that you are taking penicillin, but is effective. So in emergencies, there are still options. ...Read more

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What do you take for mvp prophylaxis if you have a penicillin allergy?

Depends: Some people use Cephalexin - recommendations change often, so you should see your doctor and get their suggestions. ...Read more

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What treatments are appropriate for tonsillitis when you have a penicillin allergy?

What treatments are appropriate for tonsillitis when you have a penicillin allergy?

Zithromax: Azithromycin (zithromax) is a good option for streptococcal tonsillitis. There is some cross-reactivity between penicillins and cephalosporins (such as keflex), and these would not be my first choice. Many infections are caused by viruses, and in this situation antibiotics are not effective. ...Read more

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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

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How to find out if I have a penicillin allergy?

How to find out if I have a penicillin allergy?

Covered by insurance: Testing for penicillin allergy involves skin testing to many of the different components of penicillin (major and minor). This testing is relatively painless and can be done in 2-3 hours. Insurance usually covers such testing. ...Read more

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How to find out if I have a penicillin allergy?

How to find out if I have a penicillin allergy?

Skin test: The formal means is to have skin testing done by a doctor. The agent is prepared to a standard small dose and injected under the skin. Reaction or not is assessed in a standard time interval. ...Read more

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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

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I am being prescribed doxycyline for a week for sinus infection. I leave to Hawaii in 7 days and WILL be in the sun. Because I have a penicillin allergy my antibiotics options are limited. Should I be worried about sun exposure? I will not be able to

I am being prescribed doxycyline for a week for sinus infection. I leave to Hawaii in 7 days and WILL be in the sun. Because I have a penicillin allergy my antibiotics options are limited. Should I be worried about sun exposure? I will not be able to

Sun sensitivity : Unfortunately your statement was cut off. If you will be unable to avoid the sun then perhaps you should find an alternative to the doxycycline which has a significant incidence of sun sensitivity. Otherwise I would recommend that you cover up and use broad-spectrum sunblock. You should check with the physician who wrote the prescription. A viral URI may not require antibiotics. ...Read more

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How much is a penicillin allergy test?

How much is a penicillin allergy test?

Depends: You should shop around - it can vary by provider, lab and region as well as if you pay cash or use insurance - would recommend calling a company like labcorp or quest for info. ...Read more

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I have a history of penicillin allergy and just today prescribed amoxacillin. Will I die?

I have a history of penicillin allergy and just today prescribed amoxacillin. Will I die?

Medical Records: It is important to speak to your physician about your history of penicillin allergy. If it is an allergic reaction, then your medical records should contain an alert. I would also advise your pharmacist, so that they may also list the allergic reaction in your records. ...Read more

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How can you test for penicillin allergy?

How can you test for penicillin allergy?

Skin and other tests: It depends on which antibiotic is of concern. There are skin tests available for many of them, but they should be performed by a properly trained allergist with the necessary controls. After skin testing, depending on the history, another step (cautious challenge or desensitization) may be necessary. ...Read more

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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

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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

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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

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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

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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

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Doctors, can my penicillin allergy prevent me from joining the u.s. navy?

Doctors, can my penicillin allergy prevent me from joining the u.s. navy?

I just reviewed: enlisted / commission physical standards and did not note medication allergies as a disqualifying condition. Good luck. ...Read more

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Should fluoroquinolones be avoided for people who have penicillin allergy?

No, they're fine: There is no cross reaction between these two classes of antibiotics. ...Read more

Black Mold (Definition)

Molds consist of airborn spores and spreading forms (hyphae) growing on surfaces. Several species are black including stachybotrys and aspergillus. Black mold ingestion has been associated with a toxic syndrome with brain and blood disorders. Most patients do not ingest black mold so the correlation with their ...Read more


Dr. John Chiu
2,638 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