Granules For Oral

INDICATIONS AND USAGE Fosfomycin Tromethamine is indicated only for the treatment of uncomplicated urinary tract infections (acute cystitis) in women due to susceptible strains of Escherichia coli and Enterococcus faecalis . Fosfomycin Tromethamine is not indicated for the treatment of pyelonephritis or perinephric abscess. If persistence or reappearance of bacteriuria occurs after treatment with Fosfomycin Tromethamine, other therapeutic agents should be selected. (See PRECAUTIONS and CLINICAL STUDIES sections.)

DOSAGE AND ADMINISTRATION The recommended dosage for women 18 years of age and older for uncomplicated urinary tract infection (acute cystitis) is one sachet of Fosfomycin Tromethamine. Fosfomycin Tromethamine may be taken with or without food. Fosfomycin Tromethamine should not be taken in its dry form. Always mix Fosfomycin Tromethamine with water before ingesting. (See PREPARATION section.)

ADVERSE REACTIONS Clinical Trials: In clinical studies, drug related adverse events which were reported in greater than 1% of the fosfomycin-treated study population are listed below: Drug-Related Adverse Events (%) in Fosfomycin and Comparator Populations Adverse Events Fosfomycin N=1233 Nitrofurantoin N=374 Trimethoprim/ sulfamethoxazole N=428 Ciprofoxacin N=455 Diarrhea 9.0 6.4 2.3 3.1 Vaginitis 5.5 5.3 4.7 6.3 Nausea 4.1 7.2 8.6 3.4 Headache 3.9 5.9 5.4 3.4 Dizziness 1.3 1.9 2.3 2.2 Asthenia 1.1 0.3 0.5 0.0 Dyspepsia 1.1 2.1 0.7 1.1 In clinical trials, the most frequently reported adverse events occurring in > 1% of the study population regardless of drug relationship were: diarrhea 10.4%, headache 10.3%, vaginitis 7.6%, nausea 5.2%, rhinitis 4.5%, back pain 3.0%, dysmenorrheal 2.6%, pharyngitis 2.5%, dizziness 2.3%, abdominal pain 2.2%, pain 2.2%, dyspepsia 1.8%, asthenia 1.7%, and rash 1.4%. The following adverse events occurred in clinical trials at a rate of less than 1%, regardless of drug relationship: abnormal stools, anorexia, constipation, dry mouth, dysuria, ear disorder, fever, flatulence, flu syndrome, hematuria, infection, insomnia, lymphadenopathy, menstrual disorder, migraine, myalgia, nervousness, paresthesia, pruritus, SGPT increased, skin disorder, somnolence, and vomiting. One patient developed unilateral optic neuritis, an event considered possibly related to Fosfomycin Tromethamine therapy. Post-marketing Experience: Serious adverse events from the marketing experience with Fosfomycin Tromethamine outside of the United States have been rarely reported and include: angioedema, aplastic anemia, asthma (exacerbation), cholestatic jaundice, hepatic necrosis, and toxic megacolon. Although causality has not been established, during post marketing surveillance, the following events have occurred in patients prescribed Fosfomycin Tromethamine: anaphylaxis and hearing loss. Laboratory Changes: Significant laboratory changes reported in U.S. clinical trials of Fosfomycin Tromethamine without regard to drug relationship include: increased eosinophil count, increased or decreased WBC count, increased bilirubin, increased SGPT, increased SGOT, increased alkaline phosphatase, decreased hematocrit, decreased hemoglobin, increased and decreased platelet count. The changes were generally transient and were not clinically significant.