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Doctor insights on: Allergic Penicillin Will Other Antibiotics Diphtheria

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Diphtheria (Definition)

A potentially fatal, contagious disease that usually involves the nose, throat, and air passages, but may also infect the skin. Its most striking feature is the formation of a grayish membrane covering the tonsils and upper ...Read more


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I'm allergic to penicillin, will other antibiotics work against a streptococcal b infection?

Yes: There are a number of effective antibiotics that your doctor can choose. Most patients who think that they are allergic to penicillin are not. Even patients who had a reaction in the past usually lose the allergy. An allergist can test to see if you are allergic. ...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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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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What antibiotic would be most effective for pneumonia-- amoxicillin, ampicillin, or penicillin?

What antibiotic would be most effective for pneumonia-- amoxicillin, ampicillin, or penicillin?

Depends: Pneumonia is an infection of the tissues of the lungs, and can be caused by many different organisms, including viruses, bacteria, atypical organisms, fungi, and even parasites, among others. The antibiotic of choice will depend on the bug and its sensitivity to antibiotics (if at all). ...Read more

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I want to know if Levaquin treats strep throat or bacterial pharyngitis since I'm allergic to penicillin and resistant to biaxin (clarithromycin)?.

I want to know if Levaquin treats strep throat or bacterial pharyngitis since I'm allergic to penicillin and resistant to biaxin (clarithromycin)?.

Not a good choice: Levaquin is a broad spectrum antibiotic and usually preferred for more serious infections. Strep throat is usually still amenable to most first generation antibiotics. Being allergic to penicillin suggests u shd try a cephalosporin which shd help. Resistant to Biaxin (clarithromycin) is unlikely and erythromycins may still work. Relatively safer medications like clindamycin also exist. ...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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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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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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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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Are penicillins effective against gram-positive bacteria? Can't take sulfa, fluoroquinolones, or cephalosporins.

Are penicillins effective against gram-positive bacteria? Can't take sulfa, fluoroquinolones, or cephalosporins.

Penicillin are ok.: Penicillins are effective against gram + organism(G+), however you will need a culture to properly identify the bacteria.there is different type of penicillin base antibiotics and they can treat a variety of infections caused by(G+), such as otitis, pharyngitis, skin infection, etc. Again it will depend on the type of infection as well as the organism you are treating. Can also use tetracycline. ...Read more

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1.5 yr old has chronic bacterial bronch. Cultures nontypeable h-flu resistant to penicillin. Allergic to sulpha. Omnicef (cefdinir) isn't working. Other options?

1.5 yr old has chronic bacterial bronch. Cultures nontypeable h-flu resistant to penicillin. Allergic to sulpha. Omnicef (cefdinir) isn't working. Other options?

A little time: Atbcs take a few days to provide noticeable clearing of symptoms. When the lab tests the mucus, the labs tests what atbc the bacteria is susceptible to. Likely your physician saw the susceptibility report and rx Omnicef (cefdinir) based on that report. Perhaps give the treatment a few more days. ...Read more

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Can augmentin (amoxicillin and clavulanate) cause a non-allergenic rash if pt has virus infection due to viral antibodies?

Can augmentin (amoxicillin and clavulanate) cause a non-allergenic rash if pt has virus infection due to viral antibodies?

Yes: Yes, but it doesn't depend on a viral infection. Many meds, including antibiotics like Augmentin (amoxicillin and clavulanate) (amoxicillin/clavulanate) can cause bothersome rashes like contact dermatitis (an allergic reaction) or urticaria (hives). Less frequently & much more serious, it (like other meds) can cause a skin reaction called erythema multiforme and stevens-johnson syndrome requiring immediate medical attention. ...Read more

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For strep throat, 5-days zithromax is easy to use. Are doctors seeing some antibiotic resistance? What's being used other than zithro, amoxil, (amoxicillin) or pcn?

Rare: There has been rare reported resistance to zithromycin (zithromax). Resistant strains were found back in 2002 in pittsburgh when 46 cases were demonstrated in a group of schoolchildren and scattered cases have been seen in multiple locales since then. Cephalosporins are useful and also used in strep carrier states too. ...Read more

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Is doxycline strong enought to kill gonorrhea virus i'm allergic to penicillin?

Is doxycline strong enought to kill  gonorrhea virus i'm allergic to penicillin?

Better...: Note: gonorrhea is a bacteria and not a virus. Antibiotics don't work on viral infections. To answer you question, doxy is a recommended drug to treat gonorrhea. Why? Gonorrhea resistance to cephalosporins (a penicillin like antibiotic) is rising; either Doxycycline or Azithromycin is effective in treating gonorrhea, and is recommended by the cdc. ...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 patient get levaquin (levofloxacin) if he allergic to penicillin?

Yes: If patient allergic to penicillin, they can get different option of medication, and Levaquin (levofloxacin) is one of them. ...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