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# Sodium Phosphate Enema
## Overview
Sodium phosphate enema is a hypertonic saline solution used as a bowel cleansing agent.
## Primary Indications
* Bowel preparation prior to colonoscopy or surgery.
* Relief of occasional constipation.
## Adult Dosing
* **Bowel Preparation:** Typically, one 4.5 oz (133 mL) bottle administered as a single dose, followed by 4-8 oz of clear liquid. Some protocols may use a split-dose regimen.
* **Constipation:** One 4.5 oz (133 mL) bottle. May repeat within 24 hours if needed, but no more than once in 24 hours or 7 times in a week.
## Pediatric Dosing
* **Children 2 to under 6 years:** 2.5 oz (75 mL) rectally.
* **Children 6 to under 12 years:** 4.5 oz (133 mL) rectally.
* **Children 12 years and older:** Adult dose.
* **Use in children under 2 years is generally not recommended due to increased risk of severe adverse effects.**
## Dose Adjustments
No specific dose adjustments are typically required based on renal or hepatic impairment, but caution is warranted.
## Contraindications
* Congenital or acquired megacolon.
* Congestive heart failure.
* Renal impairment (moderate to severe).
* Patients with colostomy or ileostomy.
* Patients with intestinal obstruction or perforation.
* Children under 2 years of age.
* Concomitant use of other sodium phosphate preparations.
* Patients on medications that affect electrolyte balance (e.g., diuretics).
## Adverse Effects
* **Common:** Abdominal cramping, nausea, vomiting, bloating, rectal irritation.
* **Serious:** Hyperphosphatemia, hypocalcemia, hypernatremia, metabolic acidosis, dehydration, renal damage, cardiac arrhythmias, seizures. These are more likely with repeated use or in susceptible individuals.
## Key Drug Interactions
* **Diuretics:** Increased risk of dehydration and electrolyte imbalance.
* **Other Sodium-Phosphate containing products:** Increased risk of hyperphosphatemia and hypocalcemia.
* **Medications affecting renal function:** Increased risk of renal toxicity.
## Monitoring
* Monitor for signs and symptoms of dehydration and electrolyte imbalance (e.g., dizziness, decreased urine output, confusion, muscle cramps).
* Monitor renal function and electrolytes in patients with risk factors or those using the product repeatedly.
## Clinical Pearls
* Ensure adequate hydration with clear liquids before and after administration.
* Do not use if rectal suppository is already present.
* Administer slowly and as high into the rectum as possible.
* Avoid use in the elderly, debilitated patients, or those with known renal disease.
* Consider alternative bowel preparation agents in patients with contraindications.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the official prescribing information and current clinical guidelines for complete and up-to-date information before making any treatment decisions.
