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Doctor insights on: Allergic Penicillin Antibiotics

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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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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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Augmentin (amoxicillin and clavulanate) allergy, should I take penicillin or clavulanate?

Augmentin (amoxicillin and clavulanate) allergy, should I take penicillin or clavulanate?

Neither: Augmentin (amoxicillin and clavulanate) is Amoxicillin ( a penicllin) and clavulante. So if one if allergic to Augmentin (amoxicillin and clavulanate) both of these should be avoided. A proper evaluation needs to be undertaken to clarify this allergy and what medicines to avoid. ...Read more

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If allergic to Bactrim (sulfamethoxazole and trimethoprim) & Ceclor, is allergy to all sulfa drugs & cephalosporins assumed?

If allergic to Bactrim (sulfamethoxazole and trimethoprim) & Ceclor, is allergy to all sulfa drugs & cephalosporins assumed?

Only if true allergy: Often, a side effect to a particular drug may by mistaken as an allergic reaction to a drug. If what you have experienced is a true allergic reaction, then you should avoid these types of drugs. ...Read more

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Can you take penicillin if an augmentin (amoxicillin and clavulanate) allergy?

Can you take penicillin if an augmentin (amoxicillin and clavulanate) allergy?

Unlikely....: Depending on the type of Augmentin (amoxicillin and clavulanate) reaction you had that was described as an "allergy"; if it's a true "allergy", then you can't take penicillin since Augmentin (amoxicillin and clavulanate) contains amoxicillin, which is a class variant. ...Read more

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Is cefuroxime axetil like penicillin?

Is cefuroxime axetil like penicillin?

Both R antibiotics: These are two antibiotics.The Cefuroxime is a cousin of penicillin. The germs they would likely kill, dose, frequency and side effects would differ. ...Read more

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Can I use Flagyl to treat strep throat? I'm allergic to penicillin, bactrum, ceftin (cefuroxime) and levaqon.

Can I use Flagyl to treat strep throat? I'm allergic to penicillin, bactrum, ceftin (cefuroxime) and levaqon.

No: Flagyl does not treat strep throat, first establish it is indeed strep throat, and see an allergist to go over your drug reactions to determine what you are indeed allergic to and what you can and cannot take. Don't self medicate! ...Read more

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Fluconazole allergic reaction?

Fluconazole allergic reaction?

Skin usually: Adverse reactions to Fluconazole are uncommon but can manifest in various ways, but usually involve skin reactions including mucus membranes like oral ulcers. Other organ systems that can be affected include nervous, heart, muscle, eye and kidney. I just saw a young lady with second episode of severe mouth and vaginal symptoms after Diflucan (fluconazole) dose. It happens. ...Read more

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Allergic to many broad spectrum antibiotics, including penicillin, cephalosporins. Clindamycin, Bactrim, Cipro (ciprofloxacin) gave C Diff. What would work for Sinus?

Allergic to many broad spectrum antibiotics, including penicillin, cephalosporins. Clindamycin, Bactrim, Cipro (ciprofloxacin) gave C Diff. What would work for Sinus?

Sinus Infection: It sounds like it may be safer not to use antibiotics. A steroid spray with a course of Prednisone may help. Even gentle saline spray may be useful. Talk to your doctor about your allergies and testing to confirm them. All the best. ...Read more

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Are there penicillin, amoxicillin or Ceclor (cefaclor) in inhalers?

Are there penicillin, amoxicillin or Ceclor (cefaclor) in inhalers?

No: These drugs do not come in inhalers normally. They can sometimes be mixed and vaporized specially in order to deliver them to the lungs in patients that are really sick or have cystic fibrosis. Also, it can be nebulized for use in sinuses. ...Read more

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Amoxicillin allergy symptoms?

Amoxicillin allergy symptoms?

Amoxicillin allergy: Symptoms may include 1 anaphylaxis which can be life threatening 2hives ang itching 3 asthma symptoms 4serum sickness, like joint pains, body aches and rashes. ...Read more

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Will penicillin vk work for bacterial vaginois?

Will penicillin vk work for bacterial vaginois?

No: No. Penicillin VK will not work for bacterial vaginosis. The antibiotics that are used to treat this infection are metronidazole and clindamycin. ...Read more

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Are penicillin vk antibiotic tablets suitable for toothache?

Are penicillin vk antibiotic tablets suitable for toothache?

Possibly: You don't know if you have an infection, do you? Taking antibiotics when you don't have an infection is totally useless, and taking antibiotics if you do have a dental infection will not fix the tooth. You still need to see a dentist for care, so the sooner you call the sooner you will feel better.. ...Read more

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Bactrim allergy would i be allergic to cipro (ciprofloxacin)?

Bactrim allergy would i be allergic to cipro (ciprofloxacin)?

Not necessarily: They are not in the same class of antibiotics, so being allergic to Bactrim does not imply you would also be allergic to cipro (ciprofloxacin). ...Read more

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I'm allergic to Erythromycin-anaphylaxis Clindamycin- anaphylaxis Bactrim- rash Sulfa drugs- rash can I use polymyxin b sulfate eye drops?

I'm allergic to Erythromycin-anaphylaxis 
Clindamycin- anaphylaxis
Bactrim- rash
Sulfa drugs- rash can I use polymyxin b sulfate eye drops?

Yes: Polymyxin is an effective anti-bacterial. You could use it without the allergies popping up as it has with others. However: are you sure you need this drop? It seems as if you are using an antibiotic for every eye inflammation, most of which are probably not bacterial. And in so doing you have sensitized yourself to antibiotics that you might need for an actual infection. ...Read more

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Is azythromycin like penicillin?

Is azythromycin like penicillin?

No: It is a completely different class of antibiotics. Azithromycin is a macrolide. So if you're allergic to penicillins only, you can take azithromycin. ...Read more

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Can someone with bactrim (sulfamethoxazole and trimethoprim) sulfa allergy take doxycycline?

Can someone with bactrim (sulfamethoxazole and trimethoprim) sulfa allergy take doxycycline?

Yes: There should be no interaction between sulfa or an allergy to Bactrim (sulfamethoxazole and trimethoprim) (which contains a sulfa antibiotic - sulfamethoxazole and another component, trimethoprim) and doxycycline. ...Read more