| Obligatory | Must not donate if: Suffers from porphyria. |
| Discretionary | If the potential donor suffers from Acute Intermittent Porphyria (AIP), Varigate Porphyria (VP) or Hereditary Coproporphyria (HCP), accept. |
| See if Relevant | Hepatitis |
| Additional Information | Porphyria Cutanea Tarda (PCT) is almost always an acquired condition associated with underlying liver disease, usually hepatitis of viral or unknown origin. Erythropoietic Protoporphyria (EPP) and Congenital Erythropoietic Porphyria (CEP) have porphyrins in the red cells causing the red cell life span to be reduced. |
| Reason for Change | This is a new guideline. |