Pharmacokinetics of Oral Calcium Carbonate in Parturients

Summary

This study investigates the time course of change in calcium in the blood after a pregnant subject takes an oral dose of calcium carbonate (commonly marketed as "Tums"). This information is important for trials investigating whether calcium can reduce postpartum hemorrhage, bleeding after delivery.

Timeline

Start

2025-01

Primary completion

2025-08

Completion

2025-10

Publications

• Background Ansari JR, Yarmosh A, Michel G, Lyell D, Hedlin H, Cornfield DN, Carvalho B, Bateman BT. Intravenous Calcium to Decrease Blood Loss During Intrapartum Cesarean Delivery: A Randomized Controlled Trial. Obstet Gynecol. 2024 Jan 1;143(1):104-112. doi: 10.1097/AOG.0000000000005441. Epub 2023 Nov 3.
• Background Ansari JR, Kalariya N, Carvalho B, Flood P, Guo N, Riley E. Calcium chloride for the prevention of uterine atony during cesarean delivery: A pilot randomized controlled trial and pharmacokinetic study. J Clin Anesth. 2022 Sep;80:110796. doi: 10.1016/j.jclinane.2022.110796. Epub 2022 Apr 18.
• Background Ansari JR, Conti DJ, Michel G, Yarmosh A, Cole NM, Shafer SL. Bioequivalence and Pharmacokinetics of Intravenous Calcium during Cesarean Delivery. Anesthesiology. 2025 Jan 1;142(1):121-131. doi: 10.1097/ALN.0000000000005248.
• Background Ansari J, Carvalho B, Shafer SL, Flood P. Pharmacokinetics and Pharmacodynamics of Drugs Commonly Used in Pregnancy and Parturition. Anesth Analg. 2016 Mar;122(3):786-804. doi: 10.1213/ANE.0000000000001143.

Drugs

Indications