Is Polyisobutylene halal?
Polyisobutylene is classified halal for halal use with High confidence. A synthetic, fully petroleum-derived polymer used as the pressure-sensitive adhesive in many transdermal patches and as a chewing-gum base. Fully synthetic with no animal inputs in standard pharmaceutical-grade material; halal.
Adhesive / matrix polymer · Confidence: High
Also known as: PIB, isobutylene polymer
Related excipients
Ranked by co-formulation in our medicine catalog, shared concern codes, and compare guides.
Adhesive / matrix polymer
Co-listed on a medicine formulation in our catalog
Excipient (solvent/vehicle)
Co-listed on a medicine formulation in our catalog
A synthetic, fully petroleum-derived polymer used as the pressure-sensitive adhesive in many transdermal patches and as a chewing-gum base.
Source:FDA IIG — Polyisobutylene
Holds the patch onto the skin and controls the diffusion rate of the drug.
Fully synthetic with no animal inputs in standard pharmaceutical-grade material; halal.
Source:FDA IIG — Polyisobutylene
- Synthetic petrochemical
Reason codes
Evidence & citations1
AuditCommon questions
- Is Polyisobutylene halal?
- RxHalal currently classifies Polyisobutylene as HALAL (High confidence). Fully synthetic with no animal inputs in standard pharmaceutical-grade material; halal. This is information only — not a fatwa or medical advice.
- What is Polyisobutylene used for in medicines?
- A synthetic, fully petroleum-derived polymer used as the pressure-sensitive adhesive in many transdermal patches and as a chewing-gum base. Holds the patch onto the skin and controls the diffusion rate of the drug.
- What are common sources of Polyisobutylene?
- Common sources include: Synthetic petrochemical. Manufacturers often do not disclose which source is used.
Medicines using this excipient
Seen most often in these conditions
Where this excipient turns up across RxHalal's tracked treatment categories.