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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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What's a good antibiotic to take if your allergic to penicillin?

What's a good antibiotic to take if your allergic to penicillin?

Cindamycin: An accepted alternative is clindamycin. The dose and frequency will need to be determined by your provider. Stay away from Amoxicillin or augmentin (amoxicillin and clavulanate). Azithromycin is also an acceptable alternative. ...Read more

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Which antibiotics cannot be given to someone who is allergic to penicillin?

Which antibiotics cannot be given to someone who is allergic to penicillin?

"cillins": Drugs where 'cillin is at the end of the name are penicillin derivatives. It turns out that drugs like Cephalosporins which share some features of the penicillin molecule are no longer considered to be cross reactive. ...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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Am I allergic to penicillin, and will I have to get expensive antibiotics instead?

Am I allergic to penicillin, and will I have to get expensive antibiotics instead?

Allergy test.: Penicillin allergy testing is available. A series of skin scratches, followed by under the skin tests are performed over 30-40 minutes. If they show no reaction, then a dose of penicillin may be given in the doctor's office to confirm beyond a doubt that there is no immediate reaction. By returning penicillin and other antibiotic choices, cost-effective treatments become available again. ...Read more

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I'm allergic to penicillin. What are the complications if I am given this antibiotic by accident?

I'm allergic to penicillin.  What are the complications if I am given this antibiotic by accident?

Depends: When one is truly allergic to penicillin, if given this could cause a reaction anywhere from hives to serious anaphylaxis. A great number of people who have a history of a reaction to penicillin, especially just a rash, may not truly be allergic or at risk. A board certified allergist can do an evaluation including allergy skin tests and an oral challenge if indicated. ...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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If a child is allergic to mold, could he also be allergic to penicillin-based antibiotics?

If a child is allergic to mold, could he also be allergic to penicillin-based antibiotics?

No: Good question. Being allergic to mold does not increase the risk of being allergic to penicillin based antibiotics. By extension. Penicillin allergic patients are not therefore allergic to blue cheese (which is a mold in the cheese). ...Read more

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

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

Yes: It is known that 60-70% of those thought penicillin allergic are not, skin testing in a protected setting can usually provide more accurate status. Nontheless, the drug Doxycycline given over a 2 wk period may cure syphillis, Azithromycin has been used but some resistant strains have been found. Penicillin is the only drug known effective during pregnancy & can be used with rapid desensitization. ...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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Hello, I have crohns disease and many antibiotics causes a sever flare up. I've had strep for almost 6wks now. Im allergic to penicillin, so that limi?

Hello, I have crohns disease and many antibiotics causes a sever flare up. I've had strep for almost 6wks now. Im allergic to penicillin, so that limi?

Which abx?: If you are truly allergic to penicillin, erythromycin would work for strep infection as well unless you have had an adverse reaction to it. If your problem is primarily GI, consider taking a probiotic with antibiotic in the future. May check with allergist to find out if you are still allergic to penicillin as well. By the way, there are good biologics which are effective for Crohn's disease. ...Read more

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I have a skin infection and need an antibiotic but allergic to penicillin? What antibiotic is good?

I have a skin infection and need an antibiotic but allergic to penicillin? What antibiotic is good?

Depends: It would depend on the type of penicillin allergy you had and the type of skin infection. If you just had a rash from penicillin and you do not have an MRSA infection cephalosporins like Keflex would be fine. If immediate hypersensitivity to penicillin, clindamycin, Doxycycline or septra (sulfamethoxazole and trimethoprim) would be options. ...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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I need medicine or antibiotics as I am getting sick with the flu. I am highly allergic to anything penicillin related ?

I need medicine or antibiotics as I am getting sick with the flu. I am highly allergic to anything penicillin related ?

Flu treatment: what is typically referred to as the flu is a virus, not a bacteria. Penicillin and other antibiotics do not treat a viral illness and are not indicated. Best approach is to get flu vaccine early in the season to prevent. Tamiflu (oseltamivir) may help shorten your symptom phase but can be expensive. It is not related to penicillin ...Read more

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If I have an std, like gonorrhea or chlamydia, and happen to be allergic to penicillin, what antibiotic can I take?

If I have an std, like gonorrhea or chlamydia, and happen to be allergic to penicillin, what antibiotic can I take?

Rocephin&Zithromax/t: We do not use penicillin to treat gonorrhea due to resistance to penicillin.We use a shot of Rocephin (ceftriaxone) which is a cephalosporin, or cefexime asingle dose of 400mgm by mouth or spectomycine can be used 2gm single doseim.But specticomycine is not available in us for chlamydia we use single dose of zithromax 1gm or vibramycine for 10 days. ...Read more

Dr. John Leander Po
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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