Amoxiclav (Amoxicillin-Clavulanate) and Metrogyl (Metronidazole) After Bypass Surgery

Short Answer

Standard Antibiotic Prophylaxis for CABG

• Prophylaxis should be administered within 120 minutes before incision
• No additional prophylactic doses should be given after wound closure in clean/clean-contaminated cases
• Fischer's Mastery of Surgery, Table 9.9

Role of Amoxiclav (Amoxicillin-Clavulanate) Post-Bypass

• Treating an established post-operative infection (e.g., wound infection, lower respiratory tract infection, urinary tract infection)
• Oral step-down therapy after initial IV antibiotics when the patient is clinically improving
• It covers a broad spectrum including gram-positive, gram-negative organisms, and anaerobes - making it useful for mixed soft-tissue infections

Role of Metrogyl (Metronidazole) Post-Bypass

• Suspected or confirmed anaerobic infection (e.g., mediastinitis with anaerobic component)
• C. difficile colitis - a common post-operative/antibiotic-associated complication
• Abdominal co-procedures (e.g., if a patient had bowel involvement during surgery) - in such cases, metronidazole may be added alongside other antibiotics
• Dental procedures post-cardiac surgery in penicillin-allergic patients

Key Clinical Considerations

Bottom Line

• Amoxiclav: Can be used post-CABG for treating infections (wound infection, pneumonia, UTI, etc.) or as step-down oral therapy - not for prophylaxis.
• Metronidazole: Only if there is a specific indication (anaerobic infection, C. diff, abdominal contamination) - not routine post-bypass use.
• Standard prophylaxis for CABG remains Cefazolin or Cefuroxime perioperatively.
• Always check for warfarin interactions in post-CABG patients, as both drugs can significantly raise INR.

Post-Op Discharge Medications - Full Explanation

1. Tab Dytor Plus (Torasemide 10mg + Spironolactone 25mg)

• 1 tab once daily at 8am - continue
• Purpose: Diuretic combination to remove excess fluid (prevent fluid retention/pulmonary edema post-bypass). Torasemide is a loop diuretic; Spironolactone is a potassium-sparing diuretic that also has cardioprotective effects in heart failure.

2. Tab Deplatt A (Clopidogrel 75mg + Aspirin 75mg)

• 1 tab once daily at 2pm - continue
• Purpose: Dual antiplatelet therapy - essential post-CABG to prevent graft thrombosis (blockage of the bypass graft). This is a standard, mandatory medication after bypass surgery.

3. Tab Rosuvas (Rosuvastatin) 20mg

• 1 tab once daily at 8pm - continue
• Purpose: Statin for cholesterol control and plaque stabilisation. Statins are mandatory post-CABG to reduce risk of future cardiac events and protect graft patency.

4. Syp Lactihep Plus (Sodium Picosulfate + Liquid Paraffin + Milk of Magnesia)

• 3 tsp once daily at 10pm - stop if loose stools occur
• Purpose: Laxative syrup to prevent constipation. Post-bypass patients are often constipated due to pain medications (opioids) and reduced activity. Straining at stool puts stress on the healing sternum (breastbone).

5. Powder Fiberlact

• 3 tsp once daily at 10pm - stop if loose stools occur
• Purpose: Fibre supplement/bulk-forming laxative - also for bowel regulation. Used alongside Lactihep Plus for the same reason above.

6. Tab Limcee (Vitamin C)

• 1 tab once daily at 10pm - for 2 weeks only
• Purpose: Vitamin C (ascorbic acid) to support wound healing of the sternal incision and leg/arm graft donor sites.

7. Tab Parasafe (Paracetamol) 500mg

• 1 tab SOS (as needed) for pain
• Purpose: Mild painkiller for post-operative pain management. "SOS" means take only when needed, not on a fixed schedule.

8. Cap Pantop DSR (Pantoprazole 40mg + Domperidone 30mg)

• 1 cap once daily before breakfast - for 1 month
• Purpose: Gastroprotection. Pantoprazole (proton pump inhibitor) protects the stomach lining from ulcers caused by aspirin (Deplatt A). Domperidone helps with gut motility and nausea. Very important since aspirin can cause gastric irritation.

9. Tab Onarni (Sacubitril 24mg + Valsartan 26mg) 50mg

• 1/2 tab twice daily - continue
• Purpose: Sacubitril-Valsartan (brand: Sacuval/Entresto) is an ARNI (Angiotensin Receptor-Neprilysin Inhibitor) - a newer heart failure medication that reduces cardiac workload, lowers blood pressure, and significantly improves outcomes in heart failure with reduced ejection fraction (HFrEF). Its prescription suggests the patient has reduced heart function (low EF) post-bypass.

10. Tab Forxiga (Dapagliflozin) 10mg

• 1 tab once daily at 6am - continue
• Purpose: SGLT2 inhibitor - originally a diabetes drug but now proven to have major cardioprotective and kidney-protective benefits even in non-diabetic patients with heart failure. Reduces hospitalisation and mortality in heart failure.

11. Tab Concor (Bisoprolol) 1.25mg

• 1 tab once daily at 10am - continue
• Purpose: Beta-blocker - slows the heart rate, reduces blood pressure and cardiac workload. Essential post-CABG to protect the heart from arrhythmias and reduce oxygen demand. The low dose (1.25mg) suggests it is being started carefully and may be up-titrated.

Nutritional Guidelines

• Salt restricted, low fat diet - standard post-cardiac surgery diet to reduce fluid retention and cholesterol.

Summary: What This Prescription Tells Us

Note: This explanation is for informational purposes only. The patient should follow the prescribing doctor's instructions and not modify any doses without consultation.