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Penicillin has not changed over the years from it's invention in 1928. You have developed some derivatives of penicillin, discovered for more than half century ago. You have penicillin V, injection procaine penicillin, injection benzathine penicillin. Then you have semisynthetic penicillins like ampicillin and amoxicillin. Then you have carboxypenicillins like carbenicillin and ureidipenicillins like piperacillin.
Virginia Von
Wiki User
∙ 9y agoPenicillin has evolved so that it can kill bacteria. The enzyme will destroy peptidoglycan , a substance that holds bacteria together, in order to attack the bacteria and stop the spread of infections.
Wiki User
∙ 12y agoBasically, all inventions, and discoveries are changed overtime because we receive more information through science. Penicillin was found by accident by Fleming, and over time, instead of being neglected it became studied by Florey, and Chain. After they proved their research penicillin was then safe to be put in a human. After that many tests were done, you can always improve penicillin, it is the main drug in many other medications. It's like the center root you build out of. I hope that helps...
Wiki User
∙ 11y agoin 1945 it was added and mixed to flour making 2 times more effective
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