Famiclav 500/125 is a combination antibiotic that contains amoxicillin, a penicillin-type antibiotic, and clavulanic acid, a beta-lactamase inhibitor. Amoxicillin works by interfering with the bacteria's ability to form cell walls, ultimately leading to their destruction. However, some bacteria produce beta-lactamase enzymes that can destroy amoxicillin. Clavulanic acid helps to block these enzymes, allowing amoxicillin to remain effective against bacteria that would otherwise be resistant. This combination is commonly used to treat a wide range of bacterial infections, including respiratory tract infections, urinary tract infections, skin infections, and sinus infections. Famiclav 500/125 is usually taken orally, with the dosage depending on the type and severity of the infection. Common side effects may include gastrointestinal issues like nausea, vomiting, or diarrhea. It is important to complete the full course of treatment as prescribed to prevent antibiotic resistance.