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## Sodium Phosphate Enema
### Overview
Sodium phosphate enema is a hypertonic saline solution used as a laxative for bowel evacuation.
### Primary Indications
* Bowel preparation for diagnostic procedures (e.g., colonoscopy, barium enema).
* Treatment of occasional constipation.
### Adult Dosing
* **Bowel Preparation:** Typically, a single dose of 4.5 ounces (133 mL) administered rectally as a single dose. For optimal results, may be repeated in 4-6 hours if needed and tolerated, per local protocol.
* **Constipation:** Typically, 2.25 ounces (66 mL) administered rectally as a single dose. May be repeated in 24 hours if needed, per local protocol.
### Pediatric Dosing
* **Children 2 to under 12 years:** 2.25 ounces (66 mL) administered rectally as a single dose.
* **Children under 2 years:** Safety and efficacy not established. Use with extreme caution and only under strict medical supervision due to increased risk of electrolyte imbalance.
### Dose Adjustments
No specific dose adjustments are typically required for renal or hepatic impairment, but caution is advised due to the risk of electrolyte abnormalities.
### Contraindications
* Congestive heart failure.
* Hypertension.
* Renal insufficiency.
* Known hypersensitivity to sodium phosphate.
* Patients with congenital megacolon or Hirschsprung disease.
* Children under 2 years of age (unless under strict medical supervision).
* Patients with ileostomy or colostomy.
* Anuria.
* Bowel obstruction.
### Adverse Effects
* **Common:** Abdominal discomfort, cramping, bloating, nausea, vomiting, diarrhea.
* **Serious:** Hyperphosphatemia, hypocalcemia, hypernatremia, dehydration, renal damage, cardiac arrhythmias, seizures. These are more likely with overuse, in patients with underlying renal disease, or in pediatric patients.
### Key Drug Interactions
* **Diuretics:** Increased risk of dehydration and electrolyte imbalances.
* **ACE Inhibitors and ARBs:** Increased risk of hyperkalemia.
* **Other laxatives:** May increase the risk of dehydration and electrolyte loss.
### Monitoring
* Monitor for signs of dehydration (thirst, dry mouth, reduced urination, dizziness).
* Monitor for electrolyte abnormalities (especially in pediatric patients, elderly, or those with renal impairment) if symptoms suggest (e.g., muscle cramps, weakness, confusion, arrhythmias).
* Assess bowel movement frequency and consistency.
### Clinical Pearls
* Instruct patients to drink plenty of clear fluids before and after administration to prevent dehydration.
* Advise patients to retain the enema for 5-15 minutes or as long as possible for optimal effect.
* Do not administer more than one enema in a 24-hour period unless directed by a healthcare provider.
* Avoid use in patients at risk for electrolyte disturbances or fluid overload.
* Rectal bleeding or failure to have a bowel movement after use may indicate a serious condition requiring medical attention.
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*This information is intended for healthcare professionals. Always consult the official prescribing information and relevant literature for complete details. Verify current prescribing information before making clinical decisions.*
