Phenoxymethyl penicillin (also known as penicillin V) is an antibiotic used to treat various bacterial infections. Its synonyms include benzylpenicillin, penicillin G, amoxicillin, and ampicillin. Benzylpenicillin and penicillin G are both penicillin antibiotics similar to phenoxymethyl penicillin, and can be used to treat similar types of bacterial infections. Amoxicillin and ampicillin are also similar antibiotics, but are often used to treat respiratory and urinary tract infections. While these medications may have different names, they all have the same goal, which is to eliminate harmful bacteria in the body and promote healing. It is important to always follow your doctor's instructions when taking antibiotics.