Fosfomycin 3g sachet is a medication primarily used to treat uncomplicated urinary tract infections (UTIs) caused by susceptible bacteria. UTIs are common bacterial infections that affect the urinary system, including the bladder, urethra, ureters, and kidneys. They can cause symptoms such as frequent and painful urination, urgency to urinate, lower abdominal discomfort, and sometimes fever and chills.

Fosfomycin is classified as a broad-spectrum antibiotic, meaning it has activity against a wide range of bacteria. It works by inhibiting bacterial cell wall synthesis, ultimately leading to bacterial cell death. This mechanism of action differs from many other antibiotics, making fosfomycin particularly useful in cases of UTIs caused by bacteria resistant to other antibiotics.

The 3g sachet formulation of fosfomycin is typically administered orally as a single dose. This convenient dosing regimen improves patient compliance and reduces the risk of missed doses. After ingestion, fosfomycin is rapidly absorbed into the bloodstream and excreted primarily unchanged in the urine, achieving high concentrations in the urinary tract where it can effectively combat bacterial infections.

Fosfomycin is generally well-tolerated, with few serious side effects. Common side effects may include gastrointestinal disturbances such as nausea, diarrhea, and abdominal pain. Serious allergic reactions are rare but possible.