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amoxicilin is a semi-synthetic form of penicillin. After

the penicillin is extracted, some of it is converted to amoxicillin. penicillin is primarily for gram+

bacteria while amoxicillin is effective against both gram positive and gram negative bacteria.Amoxicillin is better absorbed than penicillin as it can withstand the acidity of stomach juice better than penicillin releasing more antybiotics in to blood stream.

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11y ago
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8y ago

Penicillin is prescribed for tonsillitis only when there is reason to believe that the cause is bacterial. Penicillin is an antibiotic that will treat strep, which is the most common bacterial cause of tonsillitis. Most sore throats are viral, though, and won't respond to antibiotics.

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Q: Why do doctors prescribe amoxicillin instead of penicillin for tonsiitis?
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