Acetylsalicylic acid is a non-steroidal anti-inflammatory drug (NSAID) but has other, unique activity. Consequently, 18.104.22.168.1 Acetylsalicylic acid-overuse headache is coded as a separate subform.
- Headache fulfilling criteria for 8.2 Medication-overuse headache
- Regular intake of one or more non-steroidal anti-inflammatory drugs (NSAIDs)1 (other than acetylsalicylic acid) on ≥15 days/month for >3 months.
The NSAID(s) should be specified in parenthesis.