Please check your internet connection and try again.
## Sodium Phosphate Enema
### Overview
Sodium phosphate enema is a hypertonic saline solution used as a laxative to promote bowel evacuation.
### Primary Indications
* Bowel preparation for diagnostic or surgical procedures.
* Relief of occasional constipation.
### Adult Dosing
* **Bowel Preparation:** Typically, one 4.5 fl oz (133 mL) enema administered once, 2-5 hours before the scheduled procedure. For more extensive bowel cleansing, a second dose may be administered.
* **Constipation:** One 4.5 fl oz (133 mL) enema administered as a single dose. Do not use more than one enema in a 24-hour period.
### Pediatric Dosing
* **Children 2-11 years:** One 2.25 fl oz (67 mL) pediatric enema administered once, 2-5 hours before the scheduled procedure.
* **Children < 2 years:** Use is generally not recommended due to the risk of serious adverse effects, particularly hypernatremia and dehydration.
### Dose Adjustments
No specific dose adjustments are routinely recommended. However, caution is advised in patients with renal impairment, heart failure, or those on sodium-restricted diets.
### Contraindications
* Congenital megacolon.
* Congestive heart failure.
* Renal impairment.
* Active inflammatory bowel disease.
* Intestinal obstruction or perforation.
* Children less than 2 years of age.
* Patients unable to retain the enema.
* Known hypersensitivity to sodium phosphate.
### Adverse Effects
* **Common:** Abdominal cramping, bloating, nausea, vomiting, rectal irritation.
* **Serious:**
* **Electrolyte imbalances:** Hyperphosphatemia, hypocalcemia, hypernatremia, hypokalemia. This can lead to cardiac arrhythmias, seizures, tetany, and acute kidney injury.
* **Dehydration.**
* **Renal toxicity:** Acute kidney injury, especially with repeated or high-dose use, or in patients with pre-existing renal disease.
* **Colitis and ulceration** of the rectal mucosa.
### Key Drug Interactions
* **Diuretics and antihypertensives:** Increased risk of electrolyte imbalances and dehydration.
* **Sodium-loaded medications:** Increased risk of hypernatremia.
### Monitoring
* Monitor for signs and symptoms of electrolyte imbalance (e.g., confusion, muscle cramps, weakness, irregular heartbeat).
* Assess hydration status.
* Monitor renal function (BUN, creatinine) in patients at risk.
### Clinical Pearls
* Advise patients to read and follow all instructions carefully and to retain the enema for the prescribed duration (usually 5-15 minutes).
* Ensure adequate hydration before and after administration.
* Use with extreme caution in elderly patients, those with renal impairment, or cardiac conditions.
* Avoid use in patients with ileostomy or colostomy due to altered absorption and increased risk of complications.
* The risk of severe adverse events, including fatalities, has been associated with the use of sodium phosphate bowel preparations, particularly in patients with underlying risk factors.
***
**Disclaimer:** This information is intended for healthcare professionals and does not replace the need to consult the official prescribing information or other reliable sources for complete and up-to-date drug information. Always verify current prescribing information before making clinical decisions.
