Levofloxacin Hydrochloride may cause impairment of renal function, resulting in increased values of red blood cells in the urine. Levofloxacin Hydrochloride belongs to the quinolone class of antimicrobial drugs and is used clinically for a variety of infectious diseases caused by sensitive bacteria, such as pneumonia, sinusitis, bronchitis, skin and soft-tissue infections, and infections of the genitourinary tract. Among the adverse effects of this product include impairment of renal function, and therefore may lead to increased red blood cells in the urine. Adverse effects of this product also include tendonitis, tendon rupture, peripheral neuropathy, worsening of myasthenia gravis, liver injury, etc. It is contraindicated for those who are allergic to quinolones, patients under 18 years of age, pregnant and lactating women. Levofloxacin Hydrochloride should be taken under the guidance of a physician, if there is obvious discomfort after using the drug, please consult a doctor promptly.