Table 4 Classification of the medication overuse subtypes according to the ICHD-2
From: The differential diagnosis of chronic daily headaches: an algorithm-based approach
ICHD-2 code | Diagnosis | Amount of medication |
|---|---|---|
8.1 | Ergotamine overuse headache | Ergotamine intake on ≥10 days per month on a regular basis for >3 months |
8.2 | Triptan overuse headache | Triptan intake (any formulation) on ≥10 days per month on a regular basis for >3 months |
8.3 | Analgesic overuse headache | Intake of simple analgesics on ≥15 days per month on a regular basis for >3 months |
8.4 | Opioid overuse headache | Opioid intake on ≥10 days per month on a regular basis for >3 months |
8.5 | Combination analgesic overuse headache | Intake of combination analgesic medications on ≥10 days per month on a regular basis for >3 months |
8.6 | MOH attributed to combination of acute medications | Intake of any combination of ergotamine, triptans, analgesics, and/or opioids on ≥10 days per month on a regular basis for >3 months without overuse of any single class |
8.7 | Headache attributed to other medication overuse | Regular overuse for >3 months of a medication other than those described above |
8.8 | Probable MOH | Overused medication has not yet been withdrawn or medication overuse has ceased within the last 2 months but headache has not so far resolved or has reverted to its previous pattern |