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# Ezivac Enema
## Overview
Ezivac enema is a hypertonic phosphate solution used as a saline laxative. It works by osmotic pressure to draw fluid into the colon, promoting distension and stimulating peristalsis. It is intended for short-term use for constipation or bowel cleansing prior to procedures.
## Primary Indications
* Relief of occasional constipation.
* Bowel evacuation prior to proctoscopic, sigmoidoscopic, or radiologic examinations.
## Adult Dosing
* **Standard Dose:** 118 mL (one ready-to-use unit) administered rectally as a single dose.
* **Maximum Dose:** Do not exceed one unit per 24 hours.
## Pediatric Dosing
* **Children 12 years and older:** Same as adult dosing (118 mL).
* **Children 2 to 11 years:** 59 mL (partial unit or pediatric-specific product) as a single dose.
* **Children under 2 years:** Contraindicated.
* *Note: Always verify local hospital or institutional protocol, as pediatric dosing of hypertonic phosphate enemas carries significant risk of electrolyte disturbances.*
## Dose Adjustments
* **Renal Impairment:** Use with extreme caution; avoid in patients with baseline renal insufficiency due to risk of hyperphosphatemia, hypocalcemia, and hypernatremia.
* **Hepatic Impairment:** No specific adjustment necessary, but monitor fluid status.
## Contraindications
* Known hypersensitivity to phosphates.
* Megacolon (congenital or acquired).
* GI obstruction, imperforate anus, or active inflammatory bowel disease.
* Severe renal impairment.
* Congestive heart failure or ascites (due to sodium loading).
## Adverse Effects
* **Common:** Rectal irritation, abdominal pain, nausea.
* **Serious:** Severe electrolyte imbalances (hyperphosphatemia, hypocalcemia, hypernatremia, hypokalemia), dehydration, EKG changes (QT prolongation secondary to hypocalcemia), and potential for rectal mucosal injury/perforation.
## Key Drug Interactions
* **Diuretics:** Increased risk of electrolyte imbalances and dehydration.
* **Calcium Channel Blockers/Medications that prolong QT:** Risk of additive QT prolongation if electrolyte shifts occur (specifically hypocalcemia/hypokalemia).
* **Nephrotoxic agents:** Concurrent use increases risk of acute phosphate nephropathy.
## Monitoring
* **Electrolytes:** Serum phosphate, calcium, sodium, and potassium in high-risk patients.
* **Renal Function:** Serum creatinine if repeating or in susceptible populations.
* **Hydration Status:** Monitor for signs of excessive fluid loss.
## Clinical Pearls
* **Administration:** Ensure the patient is in the left lateral decubitus position (Sims’ position) for administration. Do not force the tip, as this can cause mucosal trauma or perforation.
* **Risk Profile:** Hypertonic phosphate enemas can cause rapid, severe shifts in serum electrolytes; deaths have been reported in children and elderly patients due to electrolyte toxicity.
* **Duration:** If no bowel movement occurs after administration, do not repeat; contact a healthcare provider as this may indicate a fecal impaction or obstruction.
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**Educational Disclaimer:** This information is for educational purposes only. Clinical practice guidelines vary by institution and region. Always verify specific dosing and contraindications against current FDA-approved labeling, local institutional protocols, and current serum electrolyte values before prescribing or administering Ezivac.