Theophylline toxicity and nifedipine.
D000368:Aged; D004347:Drug Interactions; D005260:Female; D006801:Humans; D009543:Nifedipine / Q000009:adverse effects*; D013806:Theophylline / Q000506:poisoning*
D013806:Theophylline; D009543:Nifedipine