| Obligatory | Must not donate if: Not investigated. |
| Discretionary | If investigated and diagnosis does not contra-indicate donation, accept. |
| See if Relevant | Drug Index - preparations which may affect platelet function Migraine Nonsteroidal Anti-Inflammatory Drugs |
| Additional Information | Headache has many causes and some will require an individual to be deferred. If a person has not been fully investigated for the cause of their headache, they may have an underlying problem that would lead to deferral. |
| Reason for change | Links have been added to 'Drug Index' and 'Nonsteroidal Anti-Inflammatory Drugs'. 'Additional Information' has been added. |