The choice of medication is based on the cause of pelvic fluid. If the pelvic fluid is caused by gram-negative or positive bacteria, levofloxacin can be used; if it is caused by anaerobic bacteria, metronidazole can be used. Levofloxacin is mainly used to treat genitourinary infections and respiratory infections caused by gram-positive or gram-negative bacteria. So if pelvic fluid is caused by gram-negative or gram-positive bacteria, it can be treated with levofloxacin. Metronidazole is mainly used to treat amebiasis and anaerobic infections, and can be used to treat pelvic fluid if it is caused by anaerobic infections. Levofloxacin has the potential to cause adverse reactions such as tendon rupture, hypersensitivity reactions, myasthenia gravis, and deterioration. Metronidazole has the potential to cause adverse reactions such as nausea, vomiting, and loss of appetite. All of the above medications should be used under the supervision of a physician. If you have pelvic effusion, it is recommended that you go to the hospital in time to clarify the cause of pelvic effusion, and under the guidance of the doctor to carry out regular treatment.