Healthy volunteers will be randomised to receive either placebo capsules PO plus an infusion of normal saline, acetylcysteine capsules PO plus an infusion of normal saline or placebo capsules PO plus an IV infusion of acetylcysteine in normal saline

Volunteers with CKD III will be randomised to receive either placebo capsules PO plus an infusion of normal saline, acetylcysteine capsules PO plus an infusion of normal saline or placebo capsules PO plus an IV infusion of acetylcysteine in normal saline

Healthy volunteers will receive a single IV dose of 100mls Visipaque 320 (iodixanol, equivalent to 320 mg iodine/ml). They will then be randomised to receive either placebo capsules PO plus an infusion of normal saline, acetylcysteine capsules PO plus an infusion of normal saline or placebo capsules PO plus an IV infusion of acetylcysteine in normal saline

Volunteers with CKD III will receive Visipaque 320 during coronary angiography. They will have been randomised to receive either placebo capsules PO plus an infusion of normal saline, acetylcysteine capsules PO plus an infusion of normal saline or placebo capsules PO plus an IV infusion of acetylcysteine in normal saline

Radiocontrast-induced Nephropathy

Participants will receive packs of either 8 placebo capsules or 8 acetylcysteine (600mg) capsules. They will be asked to take 2 tablets at 08.00 and 22.00 on the day before the study and the day of the study. On the day of the study participants will receive an IV infusion of either normal saline or acetylcysteine (200mg/kg)

Acetylcysteine

Visipaque 320

The dose of Visipaque will be administered by the consultant cardiologist performing the coronary angiography

anaphylaxis/protease

Mechanisms for the Effect of Acetylcysteine on Renal Function After Exposure to Radiographic Contrast Material

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