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Doctor insights on: Antibiotics That May Cause Reactions In Pcn Allergic Patients

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Would the older or newer generation of cephalosporins antibiotics be more likely to cause anaphylaxis in patients severely allergic to penicillin?

Would the older or newer generation of cephalosporins antibiotics be more likely to cause anaphylaxis in patients severely allergic to penicillin?

See below: Persons with type 1 immediate hypersensity to penicillin antibiotics should generally avoid taking cephalosporin antibiotics because of the low but real risk of cross allergenicity. Safe alternative antibiotics include vancomycin, septra, (sulfamethoxazole and trimethoprim) macrolides, tetracyclines, aztreonam, clindamycin, zyvox, quinolones etc. ...Read more

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Dr. John Leander Po
1,117 doctors shared insights

Antibiotic (Definition)

An antibiotic is a medicine that slows, stops, or kills germs. The germs are usually bacteria causing an infection in a person, so the person uses antibiotics to help his body get ...Read more


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Are allergic reactions common to antibiotics?

Are allergic reactions common to antibiotics?

Yes: Statistically the penicillin family of antibiotics trigger the most reactions because they are so universally used. Penicillin testing is widely available by allergists and is recommended to avoid needlessly avoiding this inexpensive and effective family of antibiotics. But any kind of antibiotic carries with it the chance of allergy, and as a class, is one of the most common drug causing allergy. ...Read more

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When in the course of taking an antibiotic are the severe allergic reactions most likely to occur ? What about mild allergic reactions?

When in the course of taking an antibiotic are the severe allergic reactions most likely to occur ? What about mild allergic reactions?

Variable: Highly variable and depends on the type of reaction. If you are already allergic then the most severe reaction can happen right away. Some reactions can appear after a few doses and some may even occur after completion. There are also non allergic side effects that can occur anytime. ...Read more

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Can you be resistant to spectrum b lactamae antibiotics and allergic? If resistant can that be sign of allergy?

Can you be resistant to spectrum b lactamae antibiotics and allergic? If resistant can that be sign of allergy?

Yes: But they are two different issues. Allergic means that your body has developed an immune or allergic reaction to the antibiotic. Resistance means that the bacteria have become resistant to the antibiotic. ...Read more

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What in crustaceans causes allergic reactions to some people?

What in crustaceans causes allergic reactions to some people?

Tropomyosin: A muscle protein called tropomyosin is the actual allergen for most people with crustacean allergies. This protein is common to many arthropods including the ubiquitous house dust mite. ...Read more

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Can an allergic reaction happen with medications for strep throat?

Can an allergic reaction happen with medications for strep throat?

Yes: You can develop an allergic reaction to most antibiotic preparations. Strep throat can also generate hives or a rosey colored flat sandpapery rash as part of the illness. ...Read more

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Is doxycycline well tolerated, & is it one of the antiobios more likely to cause allergic reactions? I'm allergic to keflex and nervous to take doxy.

Is doxycycline well tolerated, & is it one of the antiobios more likely to cause allergic reactions? I'm allergic to keflex and nervous to take doxy.

Doxycycline: Doxycycline can sometimes cause stomach upset, and this can potentially limit its use. This side effect is not an allergy, however. People who are allergic to Keflex (generic cephalexin) may need to avoid other so-called beta-lactam antibiotics, which include the penicillins and cephalosporins. An allergy to Keflex would not predispose you to an allergy to Doxycycline as they are not related. ...Read more

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Could anaphylactic reaction to administered antibiotic provoke a yeast overgrowth in the organism, as well as the blurry/double vision? Thank you.

Could anaphylactic reaction to administered antibiotic provoke a yeast overgrowth in the organism, as well as the blurry/double vision? Thank you.

Anaphylaxis: Anaphylactic reaction is a rapid reaction that if treated rapidly should be able to revert back to normal. It does not affect the immune system and therefore does not cause yeast infection. Double vision is a consequence of a neuroloigcal problem. Unless the reaction was prolonged and resulted in brain damage, i highly doubt it is related. ...Read more

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What are some foods that frequently cause allergic reactions?

What are some foods that frequently cause allergic reactions?

Vary with age: In children: milk, egg, soy, and peanut are most common. In adults: peanut, tree nuts, shellfish are most common. However, almost any food in any one person can be an allergen. ...Read more

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Can there be anything in immunizations that can cause allergic reactions?

Can there be anything in immunizations that can cause allergic reactions?

Yes: Gelatin has been shown to cause allergic reactions; it is found in MMR vaccine. Also, some individuals are sensitive to the preservative thimerasol. The risk of reaction to influenza vaccine in egg allergic patients is minimal and not considered a reason to avoid the flu shot or even test for sensitivity. ...Read more

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Can cephalosporin be given to any patient who is allergic to penicillin?

Depends: Relatively few people have reactions...In the 10 % range by some accounts. There are always alternatives. The real question should be what kind of penicillin allergy is being reported. ...Read more

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Is the antibiotic allergic reactions (like in your photo) frequently confused with scarlet fever (similar skin reaction) that accompanies the strep?

Is the antibiotic allergic reactions (like in your photo) frequently confused with scarlet fever (similar skin reaction) that accompanies the strep?

Preceding feble illn: The two rashes can overlap. Scalet fever will have a precedomg febrile illness with the rash starting 12-48 hours later, usually on the face and upper trunk with subsequent body involvement. Feels like a rough sunbun, there may be broken blood vessels in the folds of the skin with flushed cheeks and pale areas arround the mouth. The tongue is frequently red and enlarged. ...Read more

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Hi. What foods can be used to reduce the effects of allergy especially those that are rare such as rinheit allergy.I am allergic to soil ¬ums.

Hi. What foods can be used to reduce the effects of allergy especially those that are rare such as rinheit allergy.I am allergic to soil &notums.

What foods can I eat: Some advocate rotation of your foods to every four days to minimize likelihood of acquiring food sensitivity. A food allergy on the other hand can not be reduced by other specific foods. ...Read more

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I am allergic to penicillin, can other antibiotics be used to treat meningitis?

I am allergic to penicillin, can other antibiotics be used to treat meningitis?

Yes: Meningitis is a very serious infection requiring close medical attention. Viral meningitis is most common is not treated with antibiotics. If one has bacterial meningitis, this is a medical emergency. If allergic to penicillin, other antibiotics can be used. In certain indications, one can be desensitized to penicillin. ...Read more

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Is black tattoo ink hypoallergenic? Are allergic rxns to this rare for those with history of allergies? (AR, chronic urticaria....)

Is black tattoo ink hypoallergenic? Are allergic rxns to this rare for those with history of allergies? (AR, chronic urticaria....)

Tattoo inks are safe: But some people still react to them. "hypoallergenic" isn't a guarantee against allergy. Anyone can have an allergic reaction to nearly any substance, even after years of exposure. In general, tattoo ink allergic reactions are fairly rare. Only use a reputable artist. If you're concerned, ask for a test spot in an inconspicuous area 1-2 weeks before a full tattoo as a precautionary measure. ...Read more