Summary: This pilot study is proposing a novel approach to directly target intestinal oxalate absorption with the drug Tenapanor, which was recently FDA-approved for treating hyperphosphatemia in patients with chronic kidney disease. Tenapanor works by blocking paracellular phosphate absorption by the intestine, but the underlying mechanisms have not been clearly defined. Since phosphate and oxalate ions a...

Summary: Tenapanor is the newest FDA-approved drug for IBS with constipation (IBS-C). This study seeks to understand tenapanor as a treatment for cystic fibrosis-related constipation (CFrC) in CF patients. Participants will ingest one 50 mg tablet of tenapanor, twice daily, for a 4-week treatment period. They will also complete three questionnaires, the PAC-SYM, PAC-QoL, and IBS-SSS, and daily diaries to c...

Summary: Investigation of tenapanor as a potential treatment for synucleinopathy-associated constipation

Summary: This is a randomized, double-blind, placebo-controlled dose-ranging study to assess the safety and efficacy of tenapanor for treatment of the IBS-C in pediatric patients 6 to less than 12 year old.

Summary: This is a randomized, double-blind, placebo-controlled study to assess the efficacy, safety and tolerability of tenapanor (25 mg and 50 mg) in pediatric patients (≥12 and \<18 years old) with IBS-C when administered twice daily (BID) for 12 consecutive weeks.