Ciprofloxacin can dangerously increase theophylline levels in the blood, leading to life-threatening toxicity. This well-documented drug interaction requires immediate dose adjustments and monitoring to avoid seizures, arrhythmias, and hospitalization.
Theophylline has a narrow therapeutic range, and many common medications like cimetidine, fluvoxamine, and allopurinol can dangerously reduce its clearance, leading to life-threatening toxicity. Learn which drugs to avoid and how to stay safe.