Theophylline, N-acetylcysteine, and Theophylline Plus N-acetylcysteine in Preventing Contrast-induced Nephropathy

Exclusion Criteria

• •unstable angina or myocardial infarction, cardiac arrhythmia, seizures, acute renal failure, end-stage renal disease
• •unstable serum creatinine
• •unstable hemodynamic
• •intravascular administration of contrast material in the past month
• •using theophylline or N-acetylcysteine in the past month,
• •known hypersensitivity to theophylline or N-acetylcysteine