Polyethylene Glycol Sachet: Uses, Dosage & Side Effects in Pakistan

Polyethylene Glycol (Movicol / Forlax) Sachet Uses, Dosage, Side Effects & Price in Pakistan

1. Quick Info (Mukhtasir Maloomat)

2. What is PEG Sachet?

Polyethylene Glycol (PEG / Macrogol) is an osmotic laxative commonly used for constipation in Pakistan. It retains water in the gut lumen, making stool soft and voluminous — bowel movement becomes easier. Key advantage: PEG is not absorbed by the body — safe for long-term use, safe in renal impairment, and causes less gas/bloating compared to lactulose.

3. Uses

• Constipation: Chronic and acute constipation — this is the first-line pharmacological option after dietary changes and hydration
• IBS-C (Constipation-predominant IBS): For constipation in IBS
• Faecal Impaction: When stool becomes impacted in severe constipation — higher doses (multiple sachets) are given
• Bowel Preparation (colonoscopy): High-dose PEG 4L — Rx procedure, hospital/clinic setting
• Children's constipation (off-label): Clinically common use — under doctor's guidance

4. Who Should Take

• Constipation patients — when diet and fluids are not sufficient
• IBS-C patients
• Elderly patients — safe, gentle action
• Pregnant women — safe option
• Patients on medications that cause constipation (opioids, iron, calcium channel blockers)

5. When NOT to Take (Kab nahi lena chahiye)

• Bowel obstruction or suspected obstruction — CONTRAINDICATED
• Bowel perforation or risk of perforation
• Toxic megacolon
• Galactosaemia (some formulations contain electrolytes — check pack)

6. Dosage (Kitni leni hai)

• 1-3 sachets per day
• Follow pack instructions

• Higher doses (up to 8 sachets per day) over 3 days — under doctor or pharmacist's guidance
• Electrolyte monitoring at high doses

• Ask the doctor for a weight-based dose — paediatric PEG formulations available

• As a laxative, there is no strict "missed dose" concept — take as needed per regimen

7. How to Take

• Fully dissolve the sachet in a glass of water (250 mL per sachet) BEFORE drinking
• Drink the full glass
• Maintain adequate fluid intake throughout the day (8+ glasses of water)
• Drink while standing or seated — avoid aspiration in elderly patients

8. Best Time

• Morning or night — flexible; some prefer morning for a regular bowel routine
• If taking 2-3 sachets daily — split throughout day

9. Empty Stomach or After Food

• PEG can be taken with or without food — no significant difference. Some prefer taking it with food to avoid stomach discomfort.

10. Warnings (Ihtiyat)

• If severe abdominal pain, vomiting, no bowel movement, or abdominal distension — do not take PEG and see a doctor immediately — rule out bowel obstruction

• PEG is not a permanent medical treatment for constipation — the underlying cause (diet, exercise, medications, colon disease) must be addressed
• Sudden unexplained change in bowel habit (colon cancer risk over age 50) — have a doctor rule it out

• Aspiration risk — drink while seated or standing upright

11. Precautions (Ahm ehtiyaat)

• Cool and dry place — protect from moisture
• Keep sachets in original packaging
• Keep out of the reach of children

• Drinking water throughout the day while on PEG is essential — effectiveness decreases if dehydrated

12. Side Effects (Nuksanat)

• Bloating / flatulence — especially at the start; less than lactulose
• Abdominal discomfort / mild cramps
• Nausea

• Electrolyte disturbances — with high doses or prolonged excessive use; rare at recommended doses
• Aspiration — in elderly/frail patients

13. Drug Interactions

• PEG is not absorbed — no significant pharmacokinetic interactions
• Precaution: Take some medicines 1 hour before PEG — ask the pharmacist about specific medicines

14. When to See Doctor

• No bowel movement even after 3 days of PEG — possible obstruction or severe impaction — doctor to assess
• Severe abdominal pain or vomiting — bowel obstruction emergency
• Rectal bleeding observed
• Significant bloating or abdominal distension
• Sudden unexplained change in bowel habits

15. Alternatives

16. Price in Pakistan

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17. FAQs

Q: What is Movicol / PEG sachet used for?

A: PEG (Movicol/Forlax) is an osmotic laxative that treats constipation. It retains water in the gut to soften stool.

Q: How does PEG work for constipation?

A: PEG retains water in the gut lumen — stool becomes soft and loose — bowel movement is stimulated. It is not absorbed by the body.

Q: What are the side effects of PEG?

A: Common side effects include bloating and mild cramps — usually temporary. Electrolyte changes are possible at high doses.

Q: What is the price of Movicol / PEG in Pakistan?

A: Confirm from a local pharmacy or Dawaai.pk.

Q: What is the difference between PEG and lactulose?

A: PEG does not ferment — less gas/bloating than lactulose. PEG is generally better tolerated and more effective for chronic constipation.

18. Medical Review

Compiled by the PakVita Editorial Team · AI-assisted drafting with editorial review · Sourced from DRAP, WHO, BNF · Last updated: 2026-06-17

19. Disclaimer

The information on this page is for awareness only. It is not medical advice. Always consult your doctor or pharmacist before taking any medicine. PakVita is not responsible for any harm.