Diagnostic criteria: Medication-overuse headache (ICHD-3 beta 2013).
| A | Headache occurring on at least 15 days/month in a patient with a pre-existing headache disorder. |
| B | Regular overuse for more than 3 months of one or more substances used for acute or symptomatic treatment of headache. |
| C | Not better explained by another ICHD-3 diagnosis. |
