In terms of differences, eukaryotic cells are much larger and more complex than prokaryotic cells. On average, a typical eukaryotic cell is about 1,000 X larger in volume than a typical prokaryotic cell.
This means both drugs (amoxicillin and penicillin) can treat a wide variety of infections. However, unlike amoxicillin and penicillin, the routinely prescribed drug, metronidazole, has a more selective action towards anaerobic bacteria. These bacteria are the ones causing the signs and symptoms of bacterial vaginosis.
Quick Answer. Penicillin VK 500 is used to treat bacterial infections such as syphilis, strep throat, pneumonia, pharyngitis, gingivitis, rheumatic fever and bacterial endocarditis, according to Drugs.com. Common side effects of this drug include headaches, vaginal discharge or itching and sores along the tongue or mouth.