Please check your internet connection and try again.
## Sodium Phosphate Enema
### Overview
Sodium phosphate enemas are hypertonic saline solutions used as laxatives to promote bowel evacuation.
### Primary Indications
* Bowel preparation prior to colonoscopy or surgery.
* Relief of occasional constipation.
### Adult Dosing
* **Bowel Preparation:** Typically, one 4.5 oz (133 mL) enema administered rectally as directed, usually 12 to 24 hours before the procedure. Some protocols may recommend a second dose.
* **Constipation:** One 4.5 oz (133 mL) enema administered rectally. Do not use more than one enema in a 24-hour period.
### Pediatric Dosing
* **Ages 12 years and older:** Same as adult dosing.
* **Ages 6-11 years:** One 2.25 oz (66 mL) enema administered rectally.
* **Ages under 6 years:** Use is generally not recommended due to increased risk of electrolyte imbalance and toxicity. Consult with a pediatrician for alternative options.
### Dose Adjustments
No dose adjustments are typically required based on renal or hepatic impairment; however, caution is advised in patients with these conditions due to potential for fluid and electrolyte disturbances.
### Contraindications
* Congestive heart failure
* Anuria, oliguria, or renal insufficiency
* Congenital megacolon
* Intestinal obstruction or perforation
* Acute appendicitis
* Children under 6 years of age (relative contraindication due to safety concerns)
* Patients with a condition that increases the risk of electrolyte imbalance (e.g., ileostomy, colostomy, bowel dysfunction, dehydration, restricted diets).
* Patients taking diuretics or other medications that affect electrolytes.
### Adverse Effects
* **Common:** Abdominal cramping, bloating, nausea, vomiting, rectal irritation.
* **Serious:**
* **Hyperphosphatemia:** Can lead to hypocalcemia and tetany, particularly in children and those with renal impairment. Symptoms include muscle twitching, paresthesias, seizures.
* **Hyponatremia:** Can lead to confusion, lethargy, seizures.
* **Hypernatremia:** Can lead to dehydration, thirst, restlessness.
* **Dehydration**
* **Cardiac arrhythmias**
* **Renal toxicity**
### Key Drug Interactions
* **Diuretics:** Increased risk of electrolyte imbalance.
* **Other laxatives:** Increased risk of dehydration and electrolyte disturbances.
* **Medications affecting renal function:** May increase the risk of hyperphosphatemia.
### Monitoring
* Monitor for signs and symptoms of dehydration and electrolyte imbalance (e.g., thirst, decreased urination, muscle weakness, confusion, arrhythmias).
* Electrolyte levels (phosphate, calcium, sodium) may be considered in at-risk patients, especially children, the elderly, and those with renal impairment.
### Clinical Pearls
* Ensure adequate hydration before and after administration.
* Administer slowly and retain as long as possible.
* Do not administer if rectal passage of stool has not occurred within 6 hours of administration.
* Use with extreme caution in pediatric patients and those with impaired renal function.
* Consider alternative bowel preparation agents in patients with contraindications.
***
*Please verify current prescribing information before use.*
