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Doctor insights on: Allergic Penicillin Will Antibiotics

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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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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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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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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 penicillin can I take keflex?

Likely, not certain: The majority of people who are told they are allergic to penicillin are not actually so (they get rashes for other reasons, e.g.). Of those that are allergic, about 70% or more will lose the allergy after about 10 years. If you are still allergic, there is about a 10% chance of cross-reaction to 1st-gen cephalosporins like keflex. An allergist can perform testing to judge your risk for a reaction. ...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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Can I take cefuroxime axetil if allergic to penicillin?

Can I take cefuroxime axetil if allergic to penicillin?

Maybe: You have about a 2-5% chance to also be allergic to cefuroxime. You may want to talk to your allergist about testing to penicillin first to confirm this allergy. If you do have pcn allergy, then you can: 1.Use a different antibiotic 2. Do a graded challenge/desensitization to cefuroxime. If negative to pcn on testing, <1% will have problems with cefuroxime. ...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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Can i take Rocephin (ceftriaxone) if i'm allergic to penicillin?

Can i take Rocephin (ceftriaxone) if i'm allergic to penicillin?

Depends.: It depends how severe your reaction is and who the prescribing practitioner is. There is about a 10% cross reactivity with cephalosporins (Rocephin (ceftriaxone)) and penicillin based drugs. Usually if the reaction is minor, I will prescribe a cephalosporin like Rocephin (ceftriaxone). However, if the reaction to the penicillin based med is severe like shortness of breath, swelling or anaphylaxis I may avoid them completely. ...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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If i'm allergic to penicillin can I take ceftin (cefuroxime)?

Probably: There's about a 15% chance that you'll be allergic to ceftin (cefuroxime). If your penicillin allergy was life-threatening, you shouldn't take the risk, but if you just developed a rash, it's fine to try the ceftin (cefuroxime). ...Read more

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Will desensitizing me to penicillin reduce my penicillin allergy?

Will desensitizing me to penicillin reduce my penicillin allergy?

Yes, but...: Desensitization is not permanent. You have to be desensitized each time you need to take penicillin, if there are no effective alternative antibiotics that could be used. Your state of desensitization will continue for as long as you take penicillin every day, but you'll have to be desensitized again if you don't take penicillin for more than 48 hours in a row. ...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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Why give a patient zosyn (piperacillin and tazobactam) if allergc to penicilln?

Why give a patient zosyn (piperacillin and tazobactam) if allergc to penicilln?

You shouldn't: You shouldn't. Zosyn (piperacillin and tazobactam) contains the penicillin class antibiotic piperacillin which would have a very high likelihood for cross allergenicity with other drugs of the penicillin class. ...Read more

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

No: Augmentin (amoxicillin and clavulanate) is a combination of Amoxicillin and clavulinic acid. If you are allergic to augmentin (amoxicillin and clavulanate), (amoxicillin and clavulanate) it most likely means you have an allergy to penicillin. Your physician will know this and prescribe another non-related antibiotic. Do not take penicillin if you are certain you are allergic to augmentin (amoxicillin and clavulanate). ...Read more

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If allergic to Ceclor can I take penicillin?

If allergic to Ceclor can I take penicillin?

Probably, but..: It would be safer to get testing to penicillin before taking ceclor. On the other hand, if the reaction was that of joint ache, fatigue, fever etc from ceclor, it would be highly unlikely for you to react to penicillin. ...Read more

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Can u take cefuroxime if allergic to penicillin?

Can u take cefuroxime if allergic to penicillin?

Yes: I have been using Ceftin (cefuroxime axetil) in penicillin allergic patients for years without any problem. You can safely take ceftin. Other antibiotics that can be used are the fluoroquinolones such as Ciprofloxacin or levaquin (levofloxacin). The latter is more expensive but has a very low rate of bacterial resistance. ...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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