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Doctor insights on: Ampicillin Gentamicin Amoxicillin

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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


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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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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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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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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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Had to take amoxicillin, diaflucan & ampicillin b2b. Still on amp. Had unprotected sex last night. Am on second pill of BC pack. Am I safe?

Had to take amoxicillin, diaflucan & ampicillin b2b. Still on amp. Had unprotected sex last night. Am on second pill of BC pack. Am I safe?

From pregnancy?: If you are asking if you are protected from pregnancy, the answer is "probably", but not 100%. There is an inherent 0.1% failure rate of BC pills when taken perfectly, and there is the possibility that antibiotics can make them less effective, though no one has studied how much less. As for being protected from STDs, there are many infections resistant to ampicillin, so you are not safe there. ...Read more

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Had to take amoxicillin, diaflucan & ampicillin b2b. Still on amp. Had unprotected sex last night. Am on second pill of BC pack. Am I safe?

Had to take amoxicillin, diaflucan & ampicillin b2b. Still on amp. Had unprotected sex last night. Am on second pill of BC pack. Am I safe?

Probably: you are correct to be concerned about your protection! Any time you take antibiotics, there can be interference with your oral contraceptives! In this case, you are less likely to have a problem due to the timing with your cycle BUT you should ALWAYS use back up protection when taking antibiotics and don't forget that you need protection against STDs! ...Read more

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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

Dr. Lynne Weixel
71 doctors shared insights

Principen (Definition)

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


Dr. Jan Lei Iwata
71 doctors shared insights

Omnipen (Definition)

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