Most anti-diarrhoeal preparations, stimulant laxatives and bulking agents for constipation do not contain significant amounts of sodium. However, osmotic laxatives do contain significant amounts of sodium and this should be considered if people take these preparations regularly. As for all laxatives, prolonged use is not usually recommended.
The attached list provides details of sodium content at individual dose and maximum dose level, along with associated limitations. The list can be used to help find similar formulations with lower sodium content.