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Doctor insights on: Severe Allergic Reaction To Bactrim

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Allergic reaction to all cephalosporins possible?

Allergic reaction to all cephalosporins possible?

Yes: Allergy to the entire class of antibiotics called cephalosporins is indeed possible. That allergy would be the common part of the molecule shared by all cephalosporins and penicillins, the beta-lactam ring. ...Read more

Dr. John Chiu
2,716 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


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Possible to have an allergic reaction to Ceclor and amoxicillin?

Possible to have an allergic reaction to Ceclor and amoxicillin?

Yes: Allergies to penicillins (including amoxicillin) are more common than allergies to cephalosporins (including ceclor), but you can be allergic to either or both. A small percentage of people who have penicillin allergies are also allergic to cephalosporins. ...Read more

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Can Benadryl (diphenhydramine) help a swelling and hive reaction (itching) allergic reaction to penicillin?

Can Benadryl (diphenhydramine) help a swelling and hive reaction (itching) allergic reaction to penicillin?

Depends: on the reaction, if just hives and itching, yes benadryl (diphenhydramine) can control it in the right dosage, after discontinuing the offending drug, but if more severe symptoms/swelling you need medical attention with the possible addition of epinephrine and probably steroids, ...Read more

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Can juvederm reaction cause an allergic reaction?

Can juvederm reaction cause an allergic reaction?

Yes: It would be an extremely rare instance since the main component is hyaluronic acid which is present as a protein in your cells. However there is a rare instance that you are allergic. There is no allergy testing required for HA drugs ...Read more

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How can I avoid another allergic reaction to an antibiotic medicine if allergic to penicillin?

How can I avoid another allergic reaction to an antibiotic medicine if allergic to penicillin?

Avoidance: If one is allergic to penicillin then avoidance of penicillin like medications is a requirement. Other classes of antibiotics should be fine but because an individual has one drug allergy they may be at risk for reactions to other classes of drugs. One should also be very clear that moving forward that antibiotics are needed. ...Read more

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What ingredients in neosporin can an allergic reaction?

What ingredients in neosporin can an allergic reaction?

Neosporin: Neosporin is a very common allergen, as is Bacitracin (both are very commonly used). Interestingly, neither is better than vaseline at preventing infection, but both are usually better at treating one. So, if you have a scratch, simple use of vaseline (or equivalent) is best to prevent an infection, and save the antibiotics for a proven infection. Stop using neosporin if it causes a rash for u. ...Read more

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I'm allergic to penicillin. Am I also allergic to penicillin derived antibiotics?

I'm allergic to penicillin.  Am I also allergic to penicillin derived antibiotics?

Maybe: Penicillin allergy is usually secondary to either the beta-lactam components or the minor determinants. If you are found to be allergic (via skin testing) to the beta-lactam component then you are at risk for sensitization to all beta-lactam medications, including cephalosporins. Fortunately in the majority of people, this is not the case. You should consult with your local allergy specialist. ...Read more

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What could cause an allergic reaction to tattoo?

What could cause an allergic reaction to tattoo?

The dyes: It is usually an allergic contact reaction to one or more of the pigments used in tattoos. Since there is no strict regulation on the kind of pigment the artist puts into a person's skin, finding the culprit may be difficult unless you know what types of pigments were used. ...Read more

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What is risk of reaction if allergic to pcn and taking cephalosporin antibiotic?

What is risk of reaction if allergic to pcn and taking cephalosporin antibiotic?

Cephalosporin rx: Older studies suggested that there was a 5-7% risk of having a reaction to a cephalosporin if you had a history of penicillin allergy. However, there have been recent studies indicating that the newer cephalosporins are structurally different enough that the risk of cross reaction is quite low, even eliminating the need to test for penicillin allergy prior to administering the cephalosporin. ...Read more

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How to treat an allergic reaction to antibiotic?

How to treat an allergic reaction to antibiotic?

Varies: Stop antibiotic and take Benadryl (diphenhydramine) for a mild reaction like skin rash. With more serious symptoms like trouble breathing - go to er immediately as you may need more intensive treatment! ...Read more

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I'm allergic to penicillin. Am I also allergic to other antibiotics?

I'm allergic to penicillin.  Am I also allergic to other antibiotics?

Some of them: Their are different "classes", or families of antibiotics. You would be likely to have a reaction to amoxicillin, for instance. Their is some cross reactivity with cephalosporins, like keflex, in approximately 15% of people. You could be allergic to other meds as well, but would not be much more likely than the general population to have an allergy to quinolones, like cipro, (ciprofloxacin) or macrolides. ...Read more

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Can sweating cause an allergic reaction to adhesive bandages?

Can sweating cause an allergic reaction to adhesive bandages?

Can promote: Sweat won't cause an allergic reaction, but the chemicals in the adhesive may be better contacted or absorbed into the skin if sweat is present. ...Read more

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What would indicate an allergic skin reaction to amoxillin?

What would indicate an allergic skin reaction to amoxillin?

Usually hives: Allergy to penicillin usually leads to skin rash, such as hives/urticaria. All rashes are not necessarily due to true "allergy". There are skin testing protocols available to more definitively diagnose penicillin allergy. ...Read more

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A severe allergic reaction to insect bite has to include breathing problems?

A severe allergic reaction to insect bite has to include breathing problems?

Depends: This can occur and if it does, it is a severe reaction - anaphylaxis and will need immediate care. If you had an Epipen (epinephrine) from previously diagnosed severe allergy, use it then call 911. ...Read more

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Can immunizations cause allergic reactions?

Can immunizations cause allergic reactions?

Sure: Yes, any medication of vacation can cause an allergic reaction. Talk to your physician about the symptoms you are concerned about for an evaluation. ...Read more

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What's an allergic reaction to carpeting?

What's an allergic reaction to carpeting?

Carpets: Carpets are a traditional source of allergy as they harbor dust mites and mold spores. If the carpet got wet in the past more mold spores will be harbored there. The carpet also stores pet dander. A newer carpet also frquently emits chemicals that are irritants. ...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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Dr. John Chiu
1,079 doctors shared insights

Allergic Reaction (Definition)

A sensitivity to substances called allergens that come into contact with the skin, nose, eyes, respiratory tract, or gastrointestinal tract. They can be breathed into the ...Read more


Bactrim (Definition)

Trimethoprim and sulfamethoxazole, cotrimoxazole is a combination antibiotic that is used to treat a ...Read more