Are Miralax and Restoralax the same drug?
Miralax and Restoralax are not the same brand, but they are commonly the same type of laxative: both products are widely marketed as polyethylene glycol (PEG) 3350-based osmotic laxatives used to relieve constipation.
What’s different between the two?
They can differ by:
- The exact product formula and strength (for example, whether it’s PEG 3350 alone or includes other active ingredients).
- The dosing form (powder/sachet vs. other presentations).
- Inactive ingredients and packaging.
- Country/label wording, since brand names vary by market.
Because labels can change and versions can exist, the safest way to confirm is to check the “Active ingredient(s)” section on your specific box/bottle.
How can you tell quickly on the label?
Look for the active ingredient name:
- If both say polyethylene glycol (often “PEG 3350”), then the active laxative is the same class and usually comparable in how it works.
- If one lists a different active ingredient (for example, senna, bisacodyl, or lactulose), then they are not the same medication.
Are they interchangeable for constipation?
If both of your exact products are PEG 3350-based, they are generally considered interchangeable in terms of ingredient and purpose. Still, dosing can vary by concentration, so you should follow the dose directions for the specific product you’re holding.
When to ask a pharmacist or doctor
Check before switching or using either product if you have:
- Severe abdominal pain, vomiting, or signs of bowel obstruction
- Kidney disease
- Constipation lasting more than a week (or per your clinician’s guidance)
If you tell me the exact active ingredients and strength from your Miralax and Restoralax labels, I can help you confirm whether your two versions match and whether the dosing would be equivalent.