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Therapeutics

Review: Several drugs, especially triptans, are effective for pain relief in acute migraine

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ACP J Club. 2002 Nov-Dec;137:103. doi:10.7326/ACPJC-2002-137-3-103


Source Citation

Oldman AD, Smith LA, McQuay HJ, Moore RA. Pharmacological treatments for acute migraine: quantitative systematic review. Pain. 2002 Jun;97:247-57. [PubMed ID: 12044621] (All 2002 articles were reviewed for relevancy, and abstracts were last revised in 2008.)


Abstract

Question

In patients with acute migraine, are pharmacologic treatments better than placebo for short- and long-term pain relief?

Data sources

Studies in any language were identified by searching MEDLINE (1966 to 2000), EMBASE/Excerpta Medica (1980 to 2000), the Cochrane Library, and the Oxford Pain Relief Database. Pfizer Inc. was contacted for data on all randomized controlled trials (RCTs) of eletriptan.

Study selection

Studies were selected if they were double-blind, placebo-controlled RCTs of pharmacologic treatment for acute migraine (International Headache Society diagnostic criteria for migraine with or without aura) in adults. Other inclusion criteria were single migraine attack, single-dose treatment at standard doses, baseline pain of moderate or severe intensity, and dichotomous or percentage data for ≥ 1 efficacy outcome.

Data extraction

Studies were read independently by 2 reviewers and assigned a quality score. Data were extracted on study design, number of patients, dosing regimens, and timing or type of rescue medication. Outcomes were headache relief at 1 and 2 hours, freedom from pain at 2 hours, sustained relief for 24 hours, freedom from pain for 24 hours, and adverse effects within 24 hours after treatment.

Main results

48 reports of 54 trials were included (median size of treatment groups 126 patients). For headache relief at 1 and 2 hours, information was available for 13 oral interventions (11 for 1 h), 2 intranasal interventions, and subcutaneous sumatriptan (Table). All but 1 intervention (Cafergot [ergotamine tartrate plus caffeine], Novartis, East Hanover, NJ, USA) was more effective than placebo. For freedom from pain at 2 hours, information was available for 13 oral interventions, intranasal sumatriptan, and subcutaneous sumatriptan (Table). All interventions were better than placebo except for Cafergot. For sustained pain relief for 24 hours, information was available for 8 oral interventions and subcutaneous sumatriptan (Table). All interventions were better than placebo except for zolmitriptan, 5 mg. Triptans seemed to be the most effective drugs, but no drug-to-drug comparisons were reviewed. No trials reported freedom from pain for 24 hours. Side effects could not be analyzed because data were collected for a 7- to 10-day period and could not be separated from contamination with rescue medication or second doses.

Conclusions

Most pharmacologic treatments, except Cafergot, are effective for pain relief in patients with acute migraine. Subcutaneous sumatriptan and newer oral triptans seem to be the most effective drugs for aborting migraine attacks, but drug-to-drug comparisons have not been done. Data on adverse effects are lacking.

Sources of funding: Pain Relief Funds and Pfizer UK, Ltd.

For correspondence: Dr. R.A. Moore, Oxford Radcliffe Hospital, Oxford, England, UK. E-mail andrew.moore@pru.ox.ac.uk.


Table. Pharmacologic treatment vs placebo for acute migraine (range)*

Outcomes Treatment Placebo RBI NNT
Headache relief at 2 h 34% to 79% 22% to 35% 150% to 280% 2 to 6
Headache relief at 1 h 14% to 70% 8.9% to 26% 110% to 320% 3 to 11
Pain free at 2 h 11% to 60% 4.7% to 12% 240% to 640% 3 to 9
Sustained relief at 24 h 35% to 53% 14% to 27% 150% to 300% 4 to 9

*Abbreviations defined in Glossary.


Commentary

Which of the many drugs available for treatment of acute migraine should a busy clinician use? In the absence of a large, government-funded, super trial comparing all currently available therapies, we must synthesize information from other sources to assess their relative merits. The conclusions of the systematic review by Oldman and colleagues are broadly consistent with head-to-head trial results, clinical experience, and the results of another systematic review (1): First, triptans as a class outperform such nonspecific medications as nonsteroidal anti-inflammatory drugs; second, subcutaneous sumatriptan is the most effective treatment for acute migraine; and third, with the important exception of naratriptan, which is less effective than the others, available oral triptans have similar efficacy. Rank orderings of these drugs based on the number needed to treat or other derived variables have limited clinical relevance because differences are small and confidence intervals overlap. Comparative inferences are also limited because the data do not represent head-to-head RCTs and placebo responses vary between trials, indicating differences in study populations.

Through no fault of its authors, this review provides no information about several important issues in abortive treatment of migraine. No trials of such treatments as narcotics met the quality standards for inclusion in this analysis, so information enabling us to put these drugs in context is lacking. This review also did not identify results for barbiturate-containing compounds (e.g., Fiorinal [butalbital, aspirin, and caffeine], Novartis) that are commonly prescribed in the United States or 2 other triptans (almotriptan and frovatriptan) that are available. Trial results suggest that frovatriptan (2), like naratriptan, is substantially less effective than other triptans at the 2-hour efficacy end points recommended by the International Headache Society (3). Finally, the poor quality of adverse event reporting in clinical trials, as commented upon by the authors, is disappointing. Patients and physicians commonly base treatment decisions on a combined assessment of efficacy and tolerability, and the information needed to put this element of decision-making in perspective is lacking.

Elizabeth Loder, MD
Harvard Medical School
Boston, Massachusetts, USA


References

1. Ferrari MD, Roon KI, Lipton RB, Goadsby PJ. Oral triptans (serotonin 5-HT [1B/1D] agonists) in acute migraine treatment: a meta-analysis of 53 trials. Lancet. 2001;358:1668-75. [PubMed ID: 11728541]

2. Ryan R, Geraud G, Goldstein J, Cady R, Keywood C. Clinical efficacy of frovatriptan: placebo-controlled studies. Headache. 2002;42 Suppl 2:84-92. [PubMed ID: 12028324]

3. Guidelines for controlled trials of drugs in migraine. IHS members’ handbook. International Headache Society Committee on Clinical Trials in Migraine. Oslo: Scandinavian University Press; 1997.