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# Sodium Phosphate Enema
## Overview
Sodium phosphate enema is a hypertonic saline solution that acts as a saline laxative by drawing water into the colon to stimulate bowel evacuation.
## Primary Indications
Bowel preparation for colorectal procedures (e.g., colonoscopy, barium enema, surgery). Treatment of occasional constipation.
## Adult Dosing
* **Bowel Preparation:** Typically, a single 4.4 oz (130 mL) unit is administered. Some protocols may recommend a second dose 4-12 hours later depending on the procedure and patient factors.
* **Constipation:** 1.5-2.5 oz (44-74 mL) administered rectally as needed.
## Pediatric Dosing
* **Children 12 years and older:** Same as adult dosing.
* **Children 2-11 years:** 1.1 oz (32.5 mL) administered rectally.
* **Children younger than 2 years:** Use is generally not recommended due to increased risk of electrolyte imbalances and dehydration. Consult with a pediatrician for specific recommendations if necessary.
## Dose Adjustments
No specific dose adjustments are typically required for renal or hepatic impairment, but caution is advised due to the potential for electrolyte disturbances.
## Contraindications
* Congenital or acquired megacolon.
* Intestinal obstruction or perforation.
* Severe renal impairment.
* Congestive heart failure.
* Anuria.
* Children younger than 2 years of age.
* Patients with electrolyte abnormalities or at risk for them (e.g., impaired kidney function, dehydration, elderly).
* Concurrent use of other sodium phosphate products.
## Adverse Effects
Common: Abdominal cramping, bloating, nausea, vomiting, rectal irritation.
Serious: Hyperphosphatemia, hypocalcemia, hypernatremia, dehydration, electrolyte imbalances, cardiac arrhythmias, renal failure, seizures.
## Key Drug Interactions
* **Diuretics:** Increased risk of dehydration and electrolyte imbalances.
* **ACE inhibitors/ARBs:** Increased risk of hyperkalemia and hyperphosphatemia.
* **Calcium channel blockers:** Potential for altered absorption or effects.
* **Other laxatives:** May potentiate fluid and electrolyte loss.
## Monitoring
* Monitor for signs and symptoms of dehydration and electrolyte imbalance (e.g., dizziness, weakness, confusion, decreased urine output, irregular heartbeat).
* Electrolyte levels (phosphate, calcium, sodium, potassium) may be considered, especially in patients with risk factors or symptoms.
## Clinical Pearls
* Administer slowly to minimize cramping.
* Ensure adequate hydration before and after administration.
* Advise patients to retain the enema for the duration recommended by the product or healthcare provider (typically 5-15 minutes) to allow for maximum effect.
* Use with caution in the elderly and patients with impaired renal function.
* Consider alternative bowel preparation agents for patients with contraindications or high risk for complications.
*This information is intended as a quick reference and does not replace comprehensive drug information resources. Always verify current prescribing information with the latest official product labeling or a trusted drug information database.*
