1 INDICATIONS AND USAGE Potassium citrate extended-release tablets are a citrate salt of potassium indicated for the management of: Renal tubular acidosis (RTA) with calcium stones (1.1) Hypocitraturic calcium oxalate nephrolithiasis of any etiology (1.2) Uric acid lithiasis with or without calcium stones (1.3) 1.1 Renal Tubular Acidosis (RTA) with Calcium Stones Potassium citrate is indicated for the management of renal tubular acidosis [see Clinical Studies (14.1)].

1.2 Hypocitraturic Calcium Oxalate Nephrolithiasis of any Etiology Potassium citrate is indicated for the management of Hypocitraturic calcium oxalate nephrolithiasis [see Clinical Studies (14.2)] .

1.3 Uric Acid Lithiasis with or without Calcium Stones Potassium citrate is indicated for the management of Uric acid lithiasis with or without calcium stones [see Clinical Studies (14.3)].

6 ADVERSE REACTIONS Some patients may develop minor gastrointestinal complaints such as abdominal discomfort, vomiting, diarrhea, loose bowel movements or nausea.

These may be alleviated by taking the dose with meals or snacks or by reducing the dosage (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Camber Pharmaceuticals, Inc., at 1-866-495-8330 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

6.1 Postmarketing Experience Some patients may develop minor gastrointestinal complaints during potassium citrate therapy, such as abdominal discomfort, vomiting, diarrhea, loose bowel movements or nausea.

These symptoms are due to the irritation of the gastrointestinal tract, and may be alleviated by taking the dose with meals or snacks, or by reducing the dosage.

Patients may find intact matrices in their feces.