Pharmacology Ciprofloxacin should not be used with theophylline because- A it decreases efficiency of theophylline B it increases toxicity of theophylline C it decreases efficiency of ciprofloxacin D it decreases absorption of theophylline 💡 Explanation Ciprofloxacin should not be used with theophylline because- ✓ Correct Answer: B. it increases toxicity of theophylline