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Disodium Hydrogen Phosphate Dodecahydrate 24% + Sodium Dihydrogen Phosphate Dihydrate 54.22%

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At a glance

Disodium Hydrogen Phosphate Dodecahydrate 24% + Sodium Dihydrogen Phosphate Dihydrate 54.22% is an oral solution used for constipation relief and colon cleansing.

Description

Sodium phosphate can be used in the management of hypophosphataemia. It also acts as a mild osmotic laxative when given orally as dilute solutions or by the rectal route. Phosphate enemas or concentrated oral solutions are used for bowel cleansing before surgery or endoscopy procedures.

Indications
  • Occasional constipation
  • Bowel cleansing (before surgery, X-ray, or endoscopic examination)
Therapeutic class

Enema & bowel cleansing solution

Pharmacological class

Osmotic Laxative

Pharmacology

Sodium phosphate can be used in the management of hypophosphataemia. It also acts as a mild osmotic laxative when given orally as dilute solutions or by the rectal route.

Mechanism of action

Sodium phosphate draws water into the bowel, creating an osmotic effect that stimulates peristalsis and helps cleanse the colon.

Dosage

Adult (Colon cleansing - Early morning procedure): First dose at 7 AM, second dose at 7 PM (each dose: 15 mL solution + 250 mL clear liquid, repeat 3 times within 20 minutes).
Adult (Constipation - ≥12 years): 20-45 mL.
Child (10-11 years): 10-20 mL.
Child (5-9 years): 5-10 mL.

Administration

Drink at least 3 glasses (approximately 250 mL each) of clear liquids between doses. Drink plenty of fluids to prevent dehydration.

Missed dose

If you miss a dose, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose.

Side effects

Common: Bloating (31-41%), nausea (26-30%), abdominal pain (23-25%), vomiting (4-9%).
Other: Dizziness, headache, seizures, renal impairment, increased BUN/creatinine, acute renal failure, acute phosphate nephropathy, anaphylaxis, rash, pruritus, urticaria, throat tightness, bronchospasm, dyspnea.

Precautions & warnings

Caution in severe renal insufficiency (CrCl <30 mL/min), CHF, ascites, unstable angina, gastric retention, ileus, acute bowel obstruction, pseudo-obstruction, severe chronic constipation, bowel perforation, acute colitis, toxic megacolon, gastric bypass surgery, hypomotility syndrome.

Contraindications

CHF, renal failure or clinically significant impaired renal function, congenital or acquired megacolon, bowel/GI obstructions, ascites, perforation of ileus, active inflammatory bowel disease, allergy/hypersensitivity to sodium phosphate.

Drug interactions

Calcium channel blockers, diuretics, ACE inhibitors, ARBs, NSAIDs, lithium: May affect electrolyte levels.
Polyethylene glycol (PEG) preparations: Concurrent use may be dangerous; not recommended.

Food interactions

Take clear liquids (water, tea/coffee without milk, carbonated/non-carbonated soft drinks, fruit juices) - not colored red or purple. Avoid alcohol.

Use in pregnancy

Use during pregnancy is not recommended (potential harm to fetus from phosphate absorbed across the placenta).

Pregnancy Category: N/A — always consult a doctor before taking during pregnancy.

Use in lactation

Use during lactation is not recommended (potential harm to infant from phosphate excreted in breast milk).

Pediatric use

Not to be taken by children under 5 years of age.

Geriatric use

Use with extreme caution in the elderly, frail, or debilitated patients.

Renal / hepatic impairment

Caution in renal impairment; dose adjustment may be needed.

Overdose effects

Overdose may cause electrolyte imbalance, dehydration, cardiac arrhythmias. Seek medical attention.

Storage conditions

Store in a cool and dry place, protected from light. Keep out of reach of children.

Chemical structure

Disodium Hydrogen Phosphate Dodecahydrate + Sodium Dihydrogen Phosphate Dihydrate

Common questions

What is this solution used for?
It is used for constipation relief and colon cleansing before surgery/endoscopy.
What is the dosage?
Colon cleansing: 15 mL + 250 mL liquid (3 times within 20 minutes); Constipation: 5-45 mL depending on age.
What are the common side effects?
Bloating, nausea, abdominal pain, vomiting, renal impairment, electrolyte imbalance.
Who should not use it?
Patients with CHF, renal failure, bowel obstruction, ascites, active IBD, children under 5 years.
Can it be used during pregnancy?
Use during pregnancy is not recommended.
⚠️ This information is for educational purposes only — not a substitute for medical advice. Consult a registered physician before taking any medicine.