Polyethylene Glycol (PEG)

Polyethylene Glycol (PEG) in Medications

PEG: A Pharmaceutical Solvent and Stabilizer

Polyethylene glycol (PEG) is a family of polymer compounds used in many pharmaceutical products. Depending on its molecular weight, PEG can act as a solvent, binder, plasticizer, or base for ointments and creams.

What Is Polyethylene Glycol (PEG)?

Polyethylene glycol (PEG) is a family of polymer compounds used in many pharmaceutical products. Depending on its molecular weight, PEG can act as a solvent, binder, plasticizer, or base for ointments and creams.

Why Is Polyethylene Glycol (PEG) Used in Medications?

Polyethylene Glycol (PEG) is used because it:

  • Helps dissolve or disperse ingredients evenly
  • Improves texture and consistency in liquids, creams, and gels
  • Supports tablet manufacturing as a binder or coating aid

Ingredient Names to Look For

Polyethylene Glycol (PEG) may be listed as:

  • Polyethylene glycol
  • PEG
  • Macrogol (common name in many countries)
  • PEG-3350, PEG-400, PEG-6000 (examples of PEGs by molecular weight)

Where Does Polyethylene Glycol (PEG) Appear?

It is commonly found in:

  • Tablets and capsules (as a binder, coating component, or processing aid)
  • Topical creams and ointments (as a base or humectant)
  • Liquid medications (as a solvent or stabilizer)

How to Check a Medication’s Ingredient List

Inactive ingredients may vary between manufacturers, dosage forms, and strengths.

Use PillParser to scan a medication and view its ingredient list.





Adding the manufacturer filters generics (fillers/dyes often differ).

To keep PillParser free, anonymous scans are limited.

Understanding ingredient differences is especially important for individuals with known sensitivities. RxAllergyScan.com allows users to compare medication ingredients against their personal allergen profile.

Educational Note

This page provides educational information only and does not make medical claims.