First episode of Clostridioides difficile infection after co-amoxiclav

Patient C-104 is a 72-year-old woman admitted to an acute medical ward for intravenous co-amoxiclav for community-acquired pneumonia. On day 5 of her course, she develops profuse watery diarrhoea, six to eight stools per day, with mild lower abdominal cramping. On examination, temperature 38.2°C, pulse 102 bpm, blood pressure 110/68 mmHg, respiratory rate 18/min, oxygen saturation 96% on room air. Abdomen is soft with lower abdominal tenderness, no guarding. Stool sample is positive for Clostridioides difficile toxin. White cell count is 14.2 × 10⁹/L, C-reactive protein 86 mg/L. She has no known drug allergies. Her regular medicines are atorvastatin 20 mg once daily and ramipril 5 mg once daily. In addition to co-amoxiclav, she is on omeprazole 40 mg once daily for gastro-oesophageal reflux. Weight 65 kg. She is not pregnant. Write the prescription for the C. difficile infection, including any changes to her current antimicrobial therapy.