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Doctor insights on: Allergic Reaction To Antibiotics

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What does an allergic reaction to antibiotics look like?

What does an allergic reaction to antibiotics look like?

Depends: It depends on the nature of the immune response. Allergic antibody (IgE) mediated reactions occur rapidly after ingestion and can involve hives, skin swelling, wheezing, shortness of breath, nausea/vomitting, diarrhea, dizziness, confusion, palpitations, loss of consciousness and even death. A delayed reaction can occur after days on the medicine and would have different constellation of symptom ...Read more

Dr. John Chiu
2,390 doctors shared insights

Allergies (Definition)

Essentially allergies occur when your immune system goes crazy and decides to has to fight against things it should be ignoring. The immune system of people without allergies simply ignores the pollen in the air or the dander on their cat while an allergic person's immune system creates cells to fight against the pollen or dander. The allergic reaction causes the ...Read more


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How long does it take to recover from a severe allergic reaction to antibiotics?

How long does it take to recover from a severe allergic reaction to antibiotics?

Depends: on the reaction, which can range from some rash to full anaphylactic shock to other complications, first step is to stop the medicine, at times it might take weeks for the rash to go away with certain antibiotics, just keep away from direct sunlight as much as you can while you have the rash, follow up with your pcp/allergist, goodluck ...Read more

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What to do for allergic reaction to antibiotic ? Finished course. Just wait.

What to do for allergic reaction to antibiotic ?  Finished course. Just wait.

Antihistamine: A short course of antihistamines like Benadryl will help. It is advisable to have your doctor classify the allergic reaction and document in your medical record the type of antibiotic which caused the reaction. Please, always follow directions listed on over the counter meds and better yet double check with a pharmacist. ...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 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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How long does it take for hives to show up from allergic reaction to antibiotic?

How long does it take for hives to show up from allergic reaction to antibiotic?

Can vary: Allergic reactions from taking antibiotics can be an immediate event or can take days to develop. When they take a longer period of time, we call them "delayed hypersensitivity reactions". If there is a concern about an allergy to a medication, it is best to speak with the prescribing physician about what to do next. All the best! ...Read more

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I took benadryl at 745 for an allergic reaction to antibiotics. When will it kick in?

I took benadryl at 745 for an allergic reaction to antibiotics.  When will it kick in?

Dose and frequency : dependent! So you may have taken it too long ago or not enough. If you're still itching with rash you should see your PCP to make sure that it's not anything more serious that you may need something stronger. So call your doctor and be seen in person for the best care. Always good to get a professional opinion. ...Read more

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I had an allergic reaction to antibiotics almost a week ago, My face is still swollen! Should I be worried?

I had an allergic reaction to antibiotics almost a week ago, My face is still swollen! Should I be worried?

No, but keep caution: since you stopped the antibiotic, it should clear from your system, some antibiotics take longer to clear, depends too if you're on other meds, you might want to take an antihistaminic on regular basis, hopefully you don't have horseness or shortness of breath, if so, please see your doctor, goodluck ...Read more

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How long will it take for numbness and swelling/pressure to subside after an allergic reaction to antibiotics?

How long will it take for numbness and swelling/pressure to subside after an allergic reaction to antibiotics?

Allergy to antibioti: It helps if you treat it with steroids and antihistamines. It shouldn;t take but a few days though occasionally it can last a few weeks. ...Read more

Dr. John Chiu
977 doctors shared insights

Allergic Reaction (Definition)

Allergic reactions are sensitivities to substances, called allergens, that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract. They can be inhaled into the ...Read more


Dr. John Leander Po
1,118 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