Hypnic headache - a rare primary headache disorder with very good response to indomethacin. Dolezil D, Mavrokordatos C. Case Reports 2012; 33(6): 597-599 PubMed PMID: 23160225 Keywords: Anti-Inflammatory Agents, Non-Steroidal:administration & dosage, Female, Headache Disorders, Primary:drug therapy, Humans, Indomethacin:administration & dosage, Middle Aged, Remission Induction, Treatment Outcome,. Citation : Hypnic headache (HH) is considered as a disorder of the circadian rhythm, mostly affecting the elderly and generally considered a benign..... Read abstract Full text PDF