MAJOR — Use With Caution
🔴 CAUTION — Major interaction between Calcium and Ciprofloxacin. Avoid unless under direct medical supervision.
Evidence level: STRONG
Calcium prevents Cipro from working. Don't take calcium within 2 hours of this antibiotic.
Calcium chelates fluoroquinolones, reducing absorption by up to 90%.
Separate calcium supplements and ciprofloxacin by at least 2 hours (preferably 6 hours). Avoid dairy products within 2 hours of ciprofloxacin. Take ciprofloxacin with water only.
Space Calcium at least 2 hours from Ciprofloxacin. CRITICAL: Minerals chelate with antibiotics (especially tetracyclines and fluoroquinolones), reducing absorption by up to 90%. Maintain a strict 2-hour before or 4-6 hour after spacing. Complete the full antibiotic course even if symptoms improve.
Risk may increase with: older age, liver or kidney impairment, taking multiple medications, and higher doses of either substance.
Your medication may not be working properly. For antibiotics: infection not improving. For thyroid meds: fatigue, weight gain, cold sensitivity returning.
Ask your doctor: "Is there a safer alternative to Calcium that I can take with Ciprofloxacin?" Bring a list of ALL supplements and medications you take.
Antibiotic interactions are often temporary (duration of treatment). Space supplements and probiotics 2-3 hours away from antibiotic doses. Ask your pharmacist if timing adjustments can reduce the interaction risk.
Calcium prevents Cipro from working. Don't take calcium within 2 hours of this antibiotic.
Space Calcium at least 2 hours from Ciprofloxacin. CRITICAL: Minerals chelate with antibiotics (especially tetracyclines and fluoroquinolones), reducing absorption by up to 90%. Maintain a strict 2-hour before or 4-6 hour after spacing. Complete the full antibiotic course even if symptoms improve.
Your medication may not be working properly. For antibiotics: infection not improving. For thyroid meds: fatigue, weight gain, cold sensitivity returning.
Antibiotic interactions are often temporary (duration of treatment). Space supplements and probiotics 2-3 hours away from antibiotic doses. Ask your pharmacist if timing adjustments can reduce the interaction risk.
Ask your doctor: "Is there a safer alternative to Calcium that I can take with Ciprofloxacin?" Bring a list of ALL supplements and medications you take.
Or browse the full interaction database (121,000+ pairs).