A newly developed evidence-based set of recommendations and an algorithm for pharmacotherapy-based pain management in inflammatory arthritis achieved a high level of agreement among a multinational panel of rheumatologists who constitute the 2010 3e Initiative, according to a report presented by Dr. Samuel Whittle at the annual European Congress of Rheumatology.
The 3e (Evidence, Expertise, Exchange) Initiative is a multinational collaboration that aims to promote evidence-based medicine in rheumatology. For recommendations that address pain management by pharmacotherapy in inflammatory arthritis (IA), 89 of 453 rheumatologists from 17 countries who were involved in the initiative developed a list of 10 top clinical questions regarding medical treatment for IA pain.
Based on a systematic literature review performed for each question – ultimately including data from 167 relevant studies – rheumatologists from each country that was represented developed a set of national recommendations, and then multinational recommendations were formulated and assessed for agreement, reported Dr. Whittle of the Queen Elizabeth Hospital near Adelaide, Australia.
The panel made 11 recommendations in total. One of the original 10 questions was addressed by two separate systematic reviews. Six of the recommendations address the role of different analgesic medications, including combination therapy; two address pain-medication safety in patients with gastrointestinal, hepatic, renal, and cardiac comorbidities; one addresses pain measurement scales; one addresses pain management during the preconception period, pregnancy, and lactation; and one addresses the safety of analgesics in combination with methotrexate.
The level of agreement on the recommendations by the panel members ranged from 8.5 to 9.3 (mean, 8.9) on a 1- to 10-point scale.
"Although this level of agreement is quite high, it is not a particularly surprising finding," said Dr. Alexandra Colebatch, one of the authors of the report. Previous recommendations from the 3e initiative have had a mean level of agreement of 8.7 (range, 7.4-9.1) (Ann. Rheum. Dis. 2011;70:15-24) and 8.7 (range, 7.8-9.4) (Ann. Rheum. Dis. 2011;70:388-9)."
As for the algorithm developed for the pharmacologic management of pain, most (75%) of the rheumatologists said it was in accordance with their current practice, whereas 20% reported that it would change their practice, according to Dr. Whittle.
In addition to the main treatments to use in this patient population, the algorithm lists several points to consider, including type of pain, residual inflammation, comorbidities, patient preference, and addictive potential, and also includes adjuvant therapeutic options (such as tricyclic antidepressants and neuromodulators) to consider in these patients.
The evidence-based nature of these recommendations and the related algorithm, as well as the level of support demonstrated by the 3e initiative panel, suggest that they will have great utility in clinical practice, he concluded.
The individual systematic reviews are due to be published later this year, and the full recommendations and algorithm paper will be published soon, Dr. Colebatch said; 3e has previously addressed the investigation and follow-up of undifferentiated peripheral IA, and the use of methotrexate in rheumatic disorders with a focus on rheumatoid arthritis, she noted.
The panel’s 11 recommendations for pharmacotherapy pain management in IA are the following:
• In patients with IA, pain should be measured routinely using one of the following validated scales: visual analogue scale, numerical rating scale, or verbal rating scale. In addition, consider multidimensional measures or site-specific tools as needed.
• Paracetamol is recommended for the treatment of persistent pain in patients with IA.
• Systemic glucocorticoids are not recommended for the routine management of pain in patients with IA in the absence of signs and symptoms of inflammation.
• In the treatment of pain in IA, tricyclic antidepressants and neuromodulators may be considered for use as adjuvant treatment; muscle relaxants and benzodiazepines cannot be recommended.
• Weak opioids may be used for short-term treatment of pain in patients with IA when other therapies have failed or are contraindicated; long-term use may be considered and should be regularly reviewed. Strong opioids should be used only in exceptional cases.
• In patients with an inadequate response to paracetamol or NSAID monotherapy, the addition of a drug with a different mode of action could be considered; combination of two or more NSAIDs should not be used.
• NSAIDs should be used at the lowest effective dose, either continuously or on demand, according to clinical circumstances.
• Existing guidance regarding the safety of pain pharmacotherapies during preconception, pregnancy, and lactation should be applied.
• In the management of patients with IA, methotrexate can be used safely in combination with standard doses of paracetamol and/or NSAIDs (excluding anti-inflammatory doses of aspirin).