Other than that, it is used for an anaerobic bacterial infection that is found in the intestines. Metronidazole is not recommended for nursing mothers or pregnant women.

8. AztreonamAztreonam

Aztreonam is an antibiotic used solely to treat gram-negative bacteria infections. This is a strong antibiotic that fights life-threatening or severe bacterial ribosomes. Some of the bacterial infections this antibiotic is known to treat include skin, female reproductive organ infections, stomach and lower respiratory bacterial infections.

Aztreonam medication is mainly administered through injection, though, a powder form for inhalation is available. Some of the common side effects associated with the usage of this medication include fever, cough, difficulty in breathing and chest discomfort.

7. Polymyxin B (Colistin)Polymyxin B

This is an extremely potent antibiotic. It is used as a strong antibiotic when other antibiotics prove ineffective.

It causes some side effects such as redness, irritation of skin causes inside effects and burning. Though, these are not paramount to all patients.

6. LevofloxacinLevofloxacin

This is one of the most effective oral antibiotics. This drug belongs to a class of antibiotics known as Quinolones. This is simply a class of drugs that treats bactericidal infections.

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