Open AccessSystematic review and meta‐analysis on non‐opioid analgesics in palliative medicine
Author(s) -
Schüchen Robert H.,
Mücke Martin,
Marinova Milka,
Kravchenko Dmitrij,
Häuser Winfried,
Radbruch Lukas,
Conrad Rupert
Publication year - 2018
Publication title -
journal of cachexia, sarcopenia and muscle
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.803
H-Index - 66
eISSN - 2190-6009
pISSN - 2190-5991
DOI - 10.1002/jcsm.12352
Subject(s) - medicine , tolerability , opioid , cancer pain , placebo , palliative care , acetaminophen , meta analysis , morphine , medline , clinical trial , systematic review , adverse effect , anesthesia , intensive care medicine , cancer , alternative medicine , receptor , nursing , pathology , political science , law
Non‐opioid analgesics are widely used for pain relief in palliative medicine. However, there is a lack of evidence‐based recommendations addressing the efficacy, tolerability, and safety of non‐opioids in this field. A comprehensive systematic review and meta‐analysis on current evidence can provide a basis for sound recommendations in clinical practice. A database search for controlled trials on the use of non‐opioids in adult palliative patients was performed in Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, PsycINFO, and EMBASE from inception to 18 February 2018. Endpoints were pain intensity, opioid‐sparing effects, safety, and quality of life. Studies with similar patients, interventions, and outcomes were included in the meta‐analyses. Our systematic search was able to only identify studies dealing with cancer pain. Of 5991 retrieved studies, 43 could be included ( n = 2925 patients). There was no convincing evidence for satisfactory pain relief by acetaminophen alone or in combination with strong opioids. We found substantial evidence of moderate quality for a satisfactory pain relief in cancer by non‐steroidal anti‐inflammatory drugs (NSAIDs), flupirtine, and dipyrone compared with placebo or other analgesics. There was no evidence for a superiority of one specific non‐opioid. There was moderate quality of evidence for a similar pain reduction by NSAIDs in the usual dosage range compared with up to 15 mg of morphine or opioids of equianalgesic potency. The combination of NSAID and step III opioids showed a beneficial effect, without a decreased tolerability. There is scarce evidence concerning the combination of NSAIDs with weak opioids. There are no randomized‐controlled studies on the use of non‐opioids in a wide range of end‐stage diseases except for cancer. Non‐steroidal anti‐inflammatory drugs, flupirtine, and dipyrone can be recommended for the treatment of cancer pain either alone or in combination with strong opioids. The use of acetaminophen in the palliative setting cannot be recommended. Studies are not available for long‐term use. There is a lack of evidence regarding pain treatment by non‐opioids in specific cancer entities.