1.	Influence of N-Acetylcysteine on Morbidity, Oxygenation and Cytokine Levels in Partial or Total Esophagectomy for Cancer Phase: Phase IV Type: Biomarker/Laboratory analysis, Supportive care Status: Active Age: 20 to 90 Sponsor: Other Protocol IDs: 2005DR4333, NCT00512265
2.	Premedication With Simethicone or Simethicone Plus N-acetylcysteine in Improving Visibility During Upper Endoscopy Phase: Phase IV Type: Diagnostic Status: Active Age: 18 and over Sponsor: Other Protocol IDs: 12-221, NCT01653171
3.	Oral N-acetylcysteine for Protection of Human Nevi Against UV-induced Oxidative Stress/Damage in Vivo Phase: Phase II Type: Biomarker/Laboratory analysis, Prevention Status: Approved-not yet active Age: 18 and over Sponsor: Other Protocol IDs: HCI50308, NCT01612221
4.	N-AcetylCysteine vs. Placebo to Prevent Neurotoxicity Induced by Platinum Containing Chemotherapy Phase: No phase specified Type: Supportive care Status: Active Age: 18 and over Sponsor: Other Protocol IDs: LTC-510-100108-Bahce, CCMO: NL19614.091.07, EudraCT: 2007-002787-95, NCT00637624