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## Overview
Sodium phosphate enema is a hypertonic saline solution used as a laxative and bowel cleansing agent. It works by drawing water into the colon, softening stool and promoting bowel evacuation.
## Primary Indications
* Bowel preparation for diagnostic procedures (e.g., colonoscopy, sigmoidoscopy) or surgery.
* Relief of occasional constipation.
## Adult Dosing
* **Bowel Preparation:** Typically, one 4.5 oz (133 mL) bottle administered as a single dose. May be repeated as directed by a healthcare professional.
* **Constipation:** Typically, one 4.5 oz (133 mL) bottle administered as a single dose. Not recommended for daily use.
## Pediatric Dosing
* **Ages 2 to under 12 years:** 2.25 oz (66.5 mL) bottle as a single dose.
* **Under 2 years:** Contraindicated.
## Dose Adjustments
No specific dose adjustments are typically required based on renal or hepatic impairment, however, caution is advised in patients with impaired kidney function due to potential for electrolyte disturbances.
## Contraindications
* Congenital or acquired megacolon.
* Gastrointestinal obstruction or perforation.
* Heart failure.
* Renal insufficiency.
* Children under 2 years of age.
* Patients with ileostomy or colostomy.
* Patients on sodium-restricted diets.
* Patients with symptoms of appendicitis, nausea, vomiting, or abdominal pain.
## Adverse Effects
Common: Abdominal cramping, nausea, vomiting, bloating, anal irritation.
Serious: Hyperphosphatemia, hypocalcemia, hypernatremia, dehydration, cardiac arrhythmias, renal failure, seizures. Rapid absorption can lead to electrolyte imbalances, particularly in children, the elderly, and those with impaired renal function.
## Key Drug Interactions
* **Diuretics and antihypertensives:** Increased risk of electrolyte imbalance.
* **Calcium-containing medications:** May increase the risk of hyperphosphatemia.
* **Products containing magnesium or aluminum:** May increase the risk of aluminum toxicity if used concurrently with aluminum-containing antacids.
## Monitoring
* Monitor for signs and symptoms of dehydration and electrolyte imbalance (e.g., dizziness, fatigue, muscle cramps, confusion, irregular heartbeat).
* Monitor serum electrolytes (phosphate, calcium, sodium) if concerns arise, especially in at-risk populations.
## Clinical Pearls
* Administer slowly to minimize cramping and discomfort.
* Instruct patients to retain the enema for the recommended time (usually 5-15 minutes) to ensure full effect.
* Due to the risk of severe electrolyte disturbances and dehydration, sodium phosphate enema should be used with caution and only as directed by a healthcare provider. Avoid repeated or excessive use.
* Consider alternative bowel preparation agents for patients with contraindications or risk factors for electrolyte imbalance.
**Disclaimer:** This information is intended for healthcare professionals and does not replace the need to consult the official prescribing information or other up-to-date drug resources before prescribing or dispensing.
