If you took an oral sodium phosphate (OSP) to clean your bowels prior to a colonoscopy and have developed kidney damage, there is a chance your health problems are linked to the use of the OSP. In 2008, certain oral sodium phosphates, including OsmoPrep and Visicol were given a black box warning, the highest warning required by the FDA, alerting patients to the risk of kidney damage.
The OsmoPrep and the Visicol are prescription drugs, and there is also an over-the-counter preparation called a Fleet enema. These also have been linked with acute kidney damage when used as bowel preparation for a colonoscopy but not when used as a laxative. In 2008, they were also given a black box warning that warns of the potential risks of renal failure.”
There are some people who are more susceptible to renal failure than others. Some factors that can affect a patient’s susceptibility include having pre-existing kidney damage, being dehydrated while taking the OSP, being on an angiotensin-converting enzyme (ACE) inhibitor while taking the OSP, being on an angiotensin receptor blocker (ARB) while taking the OSP, having increased bowel transit times (such as a bowel obstruction or colitis), or being on a non-steroidal anti-inflammatory drug (NSAID) while taking the OSP. A final risk factor is being 55 years of age or older at the time the OSP is taken.
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