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Doctor insights on: Ampicillin Vs Amoxicillin

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Whats the difference between amoxicillin and ampicillin?

Whats the difference between amoxicillin and ampicillin?

One oral, one IV: Both are actually the same medicine, but Amoxicillin is the oral form of the medication and Ampicillin is the IV form of the medicine. I have actually also seen a few times oral Ampicillin listed as being available, but usually the oral form that is most stable and palatable is the amoxicillin. ...Read more

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


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Which one is better ampicillin or amoxicillin?

Which one is better ampicillin or amoxicillin?

Neither: Ampicillin and Amoxicillin have an identical bacterial spectrum of activity. Amoxicillin is absorbed better than Ampicillin when they are given by mouth. Ampicillin can be given in higher doses IV while Amoxicillin can only be given orally. ...Read more

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Is amoxicillin and ampicillin the same?

Is amoxicillin and ampicillin the same?

No/very similar: Amoxicillin and Ampicillin are not the same but they are very similar. Amoxicillin and Ampicillin have an identical bacterial spectrum of activity. Amoxicillin is absorbed better when given by mouth. Ampicillin is available in IV and oral form while Amoxicillin is only given orally. ...Read more

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Which one is better ampicillin or amoxicillin?

Neither: Ampicillin and Amoxicillin have an identical bacterial spectrum of activity. Amoxicillin is absorbed better than Ampicillin when they are given by mouth. Ampicillin can be given in higher doses IV while Amoxicillin can only be given orally. ...Read more

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Whats the difference between amoxicillin and ampicillin?

One oral, one IV: Both are actually the same medicine, but Amoxicillin is the oral form of the medication and Ampicillin is the IV form of the medicine. I have actually also seen a few times oral Ampicillin listed as being available, but usually the oral form that is most stable and palatable is the amoxicillin. ...Read more

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I ran out of my amoxicillin. May i switch from taking amoxicillin to ampicillin?

I ran out of my amoxicillin. May i switch from taking amoxicillin to ampicillin?

Maybe not, however: Though both are penicillins, the types of bacteria each affects may be different. Best to check with your physician who may have the urine culture to make a better judgement. ...Read more

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I'm on ampicillin for sinusitis but have gotten much worse on it, does that mean that amoxicillin would not work as well? Always taken Amox in past

 I'm on ampicillin for sinusitis but have gotten much worse on it, does that mean that amoxicillin would not work as well?  Always taken Amox in past

Its virus..: If you have sinus infection - it could be VIRAL- antibiotics as Amoxicillin are indicated ONLY for severe BACTERIAL infection. Headache, mucus, drainage is part of congestion better treated with nasal saline rinses, steam inhalation, hydration, rest... symptomatic treatment. Bacteria may be as well resistant since you used Amox too much in past! Consume probiotic rich diet to restore immune system ...Read more

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What is the usual dose of ampicillin and amoxicillin to cure bv?

What is the usual dose of ampicillin and amoxicillin to cure bv?

BV: Ampicillin and Amoxicillin are neither effective Antibiotics for BV nor first choice, please talk to your provider for appropriate diagnosis and treatment. ...Read more

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Dr. Linda Callaghan
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Principen (Definition)

Principen is a third generation penicillin which is a kind of penincillin type drug (anti-bacterial ...Read more


Dr. Eric Weisman
71 doctors shared insights

Omnipen (Definition)

Omnipen is a third generation penicillin which is a kind of penincillin type drug (anti-bacterial ...Read more