Respuesta :
The reason can be the resistance of infection to the drug.
Penicillin is a group of antibiotics that fight bacteria and was originally developed from the Penicillium fungi. Penicillin V is one type of penicillin antibiotic and is used to treat a wide range of bacterial infections such as ear infections, throat infections, skin infections and preventing rheumatic fever.
It should only used if the bacterial infection is sensitive to penicillin V.
Penicillin V may also be used for other purposes not listed in this medication guide.
Penicillin V can make birth control pills less effective, which may result in pregnancy. Before taking this medicine, tell your doctor if you use birth control pills. Take penicillin V for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated. Penicillin V will not treat a viral infection such as the common cold or flu. Do not give this medication to another person, even if they have the same symptoms you do.
Learn more about Penicillin here https://brainly.in/question/51472169
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