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Doctor insights on: How Long Should An Allergic Reaction To Amoxicillin Last

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Dr. John Chiu
2,656 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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How long should an allergic reaction symptom to an antibiotic last for?

How long should an allergic reaction symptom to an antibiotic last for?

Antibiotic allergy: Antibiotic allergies can clear up in a day or last up to six months. Fortunately, most resolve relatively quickly, over a few days. We do not yet know why some persist for a long time and require strong medications like oral steroids (e.g. Prednisone) in order to settle down. ...Read more

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How long will hives last if i'm having an allergic reaction to medication?

How long will hives last if i'm having an allergic reaction to medication?

Less than one week: Typically, hives due to a medication will last for only a few days; two weeks tops. Medications that stay in the body for a few days could cause longer reactions. Adverse reactions to medications should always been discussed with and shown to the prescribing physician, so that the true cause is identified, and your chart is marked so you aren't given that medication again in the future. ...Read more

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How long would it take for an allergic reaction to occur to antibiotics?

How long would it take for an allergic reaction to occur to antibiotics?

Immed or 7-10 days: Paitents may exhibit immediate or delayed type hypersensitivity which can range from immediate symptoms to those delayed by 10 days. ...Read more

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How long can it take for an allergic reaction to occur after taking antibiotics?

How long can it take for an allergic reaction to occur after taking antibiotics?

Quick: True allergic reactions typically happen after the first dose. Other reactions can occur later in the course. ...Read more

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How long does an allergic reaction to a vaccine last?

How long does an allergic reaction to a vaccine last?

Vaccine reactions: The duration of an allergic reaction to a vaccine depends on the type of allergic reaction and on the person having the reaction. Reactions like classic allergies, ie hives or "urticaria" may last a few days, whereas those that are more serum sickness-like, with joint pains, sometimes last longer, like weeks or months, and require treatment with steroids. Most reactions are short-lived. ...Read more

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How long should symptoms of an allergic reaction last?

How long should symptoms of an allergic reaction last?

Allergy duration: The duration of allergic symptoms are very variable. The type of reaction (ige vs. Igg), persistance of exposure, degree of sensitization, and comorbidities (other illnesses) can all affect the duration of symptoms. Therefore reactions can last from minutes to months. ...Read more

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How long until i see the effects of prednisone for an allergic reaction to cephalexin , severe rash?

A few days: You should start seeing improvement hopefully within a few days. Using a topical steroid cream with the oral steroid can also help quicken recovery. If it is not improving, let your physician know. ...Read more

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Is it possible to have an allergic reaction to amoxicillin 5 days after finishing the last dose?

Is it possible to have an allergic reaction to amoxicillin 5 days after finishing the last dose?

Yes: This usually happens with the initial sensitization which may take about 10 days to manifest. The reaction from subsequent exposure will likely be much faster. ...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

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On average, how long will an allergic reaction to food last?

On average, how long will an allergic reaction to food last?

Allergic reactions: Food allergic reactions typically begin within 30 munutes of an ingestion and typically peak at about 30 minutes after they begin. The reaction may be short lived, lasting only a few hours (typical) or long-last; possibly for days (rare). ...Read more

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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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How to tell if i'm having an allergic reaction to amoxicillin?

How to tell if i'm having an allergic reaction to amoxicillin?

Rash or hives: Most reactions to medication cause either an immediate reaction such as hives, swelling, and low blood pressure, which is an emergency, or a delayed skin rash which can occur days later. ...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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How long does an food allergy rash reaction last for a baby?

How long does an food allergy rash reaction last for a baby?

Few days: Once the offending food is identified and removed from the diet, the rash should go away in a few days. Most likely this is not a true food allergy and is some sort of environmental irritant rash. ...Read more

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Amoxicillin (Definition)

Amoxicillin is in the penicillin class of antibiotics. All penicillins are distinguished by the presence of a beta-lactam ring, and are known to kill bacteria by inhibiting synthesis (production) ...Read more


Dr. John Chiu
1,052 doctors shared insights

Allergic Reaction (Definition)

A sensitivity to substances called allergens that come into contact with the skin, nose, eyes, respiratory tract, or gastrointestinal tract. They can be breathed into the ...Read more