Medication overuse headache

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Medication overuse headache
Classification and external resources
ICD-10 G44.41, G44.83

Medication overuse headache (MOH), also known as rebound headache usually occurs when analgesics are taken frequently to relieve headaches. Rebound headaches frequently occur daily, can be very painful and are a common cause of chronic daily headache. They typically occur in patients with an underlying headache disorder such as migraine or tension-type headache that "transforms" over time from an episodic condition to chronic daily headache due to excessive intake of acute headache relief medications. MOH is a serious, disabling and well-characterized disorder, which represents a worldwide problem and is now considered the third-most prevalent type of headache. Population-based studies report the prevalence rate of MOH to be 1% to 2% in the general population, but its relative frequency is much higher in secondary and tertiary care.

Classification[edit]

Medication overuse headache is a recognized ICHD (International Classification of Headache Disorders) classification.[1] Over the years different sets of diagnostic criteria have been proposed and revised by the major experts of headache disorders. The term MOH first appeared in the ICHD 2nd edition in 2004. It was defined as a secondary headache, with the aim of emphasising excessive drug intake as the basis of this form of headache. The two subsequent revisions of the diagnostic criteria for MOH (2005 and 2006) refined and extended the definition of the condition on the basis of both its chronicity (headache on more than 15 days/month for more than three months) and drug classes, thereby identifying the main types of MOH. In the case of ergotamine, triptans, opioids and combination medications in particular, intake on > 10 days/month for > 3 months is required, whereas simple analgesics are considered overused when they are taken on > 15 days/month for >3 months.

Causes[edit]

MOH is known to occur with frequent use of many different medications, including most commonly: triptans,[2] ergotamines,[3] analgesics,[4] opioids.[5] The underlying mechanisms that lead to the development of the condition are still widely unknown and clarification of their role is hampered by a lack of experimental research or suitable animal models. Various pathophysiological abnormalities have been reported and they seem to have an important role in initiating and maintaining chronic headache (genetic disposition, receptor and enzyme physiology and regulation, psychological and behavioural factors, physical dependencies, recent functional imaging results).

Headache treatment[edit]

Opioids and butalbital are sometimes inappropriately used as treatment for migraine and headache and should be avoided in favor of more effective, migraine-specific treatments.[6][7] Opioid and butalbital use can worsen headaches and cause MOH.[6] When a patient fails to respond to other treatment or migraine specific treatment is unavailable, then opioids may be used.[7]

Regular use of over-the-counter drugs such as acetaminophen and NSAIDs can also be a cause of MOH.[8] OTC medication for headache should be limited to use for not more than two days weekly.[8] Concurrent with MOH, overuse of acetaminophen for treating headaches risks causing liver damage and NSAID overuse can cause gastrointestinal bleeding.[8]

Treatment[edit]

MOH is common and can be treated. The overused medications must be stopped for the patient's headache to resolve. Clinical data shows that the treatment of election is abrupt drugs withdrawal, followed by starting prophylactic therapy. However, the discontinuation of overused drugs usually leads to the worsening of headache and the appearance of drug withdrawal symptoms (that greatly depend on the previously overused drugs and typically last from two to ten days and that are relieved by the further intake of the overused medication), which might reinforce the continuation of overuse. Where physical dependence or a rebound effect such as rebound headache is possible, gradual reduction of medication may be necessary.[9] It is important that the patient's physician be consulted before abruptly discontinuing certain medications as such a course of action has the potential to induce medically significant physical withdrawal symptoms. Abruptly discontinuing butalbital, for example, can actually induce seizures in some patients, although simple over the counter analgesics can safely be stopped by the patient without medical supervision. A long-acting analgesic/anti-inflammatory, such as naproxen (500 mg twice a day), can be used to ease headache during the withdrawal period.[10][11] Two months after the completion of a medication withdrawal, patients suffering from MOH typically notice a marked reduction in headache frequency and intensity.[12]

Drug withdrawal is performed very differently within and across countries. Most physicians prefer inpatients programmes, however effective drug withdrawal may also be achieved in an outpatient setting in uncomplicated MOH patients (i.e. subjects without important co-morbidities, not overusing opioids or ergotaminics and who are at their first detoxification attempt). In the absence of evidence-based indications, in MOH patients the choice of preventive agent should be based on the primary headache type (migraine or TTH), on the drug side-effect profile, on the presence of co-morbid and co-existent conditions, on patient’s preferences, and on previous therapeutic experiences.

Following an initial improvement of headache with the return to an episodic pattern, a relevant proportion (up to 45%) of patients relapse, reverting to the overuse of symptomatic drugs.

Predictors of the relapse, and that could influence treatment strategies, are considered the type of primary headache, from which MOH has evolved, and the type of drug abused (analgesics, and mostly combination of analgesics, but also drugs containing barbiturates or tranquillisers cause significantly higher relapse rates), while gender, age, duration of disease and previous intake of preventative treatment do not seem to predict relapse rate.

MOH is clearly a cause of disability and, if not adequately treated, it represents a condition of risk of possible co-morbidities associated to the excessive intake of drugs that are not devoid of side-effect. MOH can be treated through withdrawal of the overused drug(s) and by means of specific approaches that focus on the development of a close doctor-patient relationship in the post-withdrawal period.

Prevention[edit]

In general, any patient who has frequent headaches or migraine attacks should be considered as a potential candidate for preventive medications instead of being encouraged to take more and more painkillers or other rebound-causing medications. Preventive medications are taken on a daily basis. Some patients may require preventive medications for many years; others may require them for only a relatively short period of time such as six months. Effective preventive medications have been found to come from many classes of medications including neuronal stabilizing agents (aka anticonvulsants), antidepressants, antihypertensives, and antihistamines. Some effective preventive medications include Elavil (amitriptyline), Depakote (valproate), Topamax (topiramate), and Inderal (propranolol).

History[edit]

Rebound headache was first described by Dr. Lee Kudrow.[13]

See also[edit]

References[edit]

  1. ^ "The International Headache Classification". http://ihs-classification.org/. International Headache Society. Retrieved 28 June 2014. 
  2. ^ "The International Classification of Headache Disorders". http://ihs-classification.org. The International Headache Society. Retrieved 28 June 2014. 
  3. ^ "The International Classification of Headache Disorders". http://ihs-classification.org. The International Headache Society. Retrieved 28 June 2014. 
  4. ^ "The International Classification of Headache Disorders". http://ihs-classification.org. The International Headache Society. Retrieved 28 June 2014. 
  5. ^ "The International Classification of Headache Disorders". http://ihs-classification.org. The International Headache Society. Retrieved 28 June 2014. 
  6. ^ a b Consumer Reports Health Best Buy Drugs (21 August 2012), "Treating Migraine Headaches: Some Drugs should rarely be used", Drugs for Migraine Headaches (AAN), Yonkers, New York: Consumer Reports, retrieved 28 October 2013 
  7. ^ a b American Academy of Neurology (February 2013), "Five Things Physicians and Patients Should Question", Choosing Wisely: an initiative of the ABIM Foundation (American Academy of Neurology), retrieved August 1, 2013 , which cites
    • Silberstein, S. D. (2000). "Practice parameter: Evidence-based guidelines for migraine headache (an evidence-based review): Report of the Quality Standards Subcommittee of the American Academy of Neurology". Neurology 55 (6): 754–762. doi:10.1212/WNL.55.6.754. PMID 10993991.  edit
    • Evers, S.; Afra, J.; Frese, A.; Goadsby, P. J.; Linde, M.; May, A.; Sándor, P. S.; European Federation of Neurological Societies (2009). "EFNS guideline on the drug treatment of migraine - revised report of an EFNS task force". European Journal of Neurology 16 (9): 968–981. doi:10.1111/j.1468-1331.2009.02748.x. PMID 19708964.  edit
    • Institute for Clinical Systems Improvement (2011), Headache, Diagnosis and Treatment of, Institute for Clinical Systems Improvement 
  8. ^ a b c American Headache Society (September 2013), "Five Things Physicians and Patients Should Question", Choosing Wisely: an initiative of the ABIM Foundation (American Headache Society), retrieved 10 December 2013 , which cites
    • Bigal, M. E.; Serrano, D.; Buse, D.; Scher, A.; Stewart, W. F.; Lipton, R. B. (2008). "Acute Migraine Medications and Evolution from Episodic to Chronic Migraine: A Longitudinal Population-Based Study". Headache: the Journal of Head and Face Pain 48 (8): 1157–1168. doi:10.1111/j.1526-4610.2008.01217.x. PMID 18808500.  edit
    • Bigal, M. E.; Lipton, R. B. (2008). "Excessive acute migraine medication use and migraine progression". Neurology 71 (22): 1821–1828. doi:10.1212/01.wnl.0000335946.53860.1d. PMID 19029522.  edit
    • Zwart, J. A.; Dyb, G.; Hagen, K.; Svebak, S.; Holmen, J. (2003). "Analgesic use: A predictor of chronic pain and medication overuse headache: The Head-HUNT Study". Neurology 61 (2): 160–164. doi:10.1212/01.WNL.0000069924.69078.8D. PMID 12874392.  edit
    • Silberstein, S. D. (2000). "Practice parameter: Evidence-based guidelines for migraine headache (an evidence-based review): Report of the Quality Standards Subcommittee of the American Academy of Neurology". Neurology 55 (6): 754–762. doi:10.1212/WNL.55.6.754. PMID 10993991.  edit
  9. ^ de Filippis S, Salvatori E, Farinelli I, Coloprisco G, Martelletti P (2007). "Chronic daily headache and medication overuse headache: clinical read-outs and rehabilitation procedures". Clin Ter 158 (4): 343–7. PMID 17953286. 
  10. ^ Silberstein SD, McCrory DC (2001). "Butalbital in the treatment of headache: history, pharmacology, and efficacy". Headache 41 (10): 953–67. doi:10.1046/j.1526-4610.2001.01189.x. PMID 11903523. 
  11. ^ Loder E, Biondi D (September 2003). "Oral phenobarbital loading: a safe and effective method of withdrawing patients with headache from butalbital compounds". Headache 43 (8): 904–9. doi:10.1046/j.1526-4610.2003.03171.x. PMID 12940814. 
  12. ^ Zeeberg P, Olesen J, Jensen R (June 2006). "Probable medication-overuse headache: the effect of a 2-month drug-free period". Neurology 66 (12): 1894–8. doi:10.1212/01.wnl.0000217914.30994.bd. PMID 16707727. 
  13. ^ Kudrow L (1982). "Paradoxical effects of frequent analgesic use". Adv Neurol 33: 335–41. PMID 7055014. 

More bibliography

Useful and interesting links

International Headache Society

European Headache Federation

The Journal of Headache and Pain

COMOESTAS Project