There are clearly differences in how people respond to opioids, both in terms of efficacy of pain relief and severity of side effects, and for some chronic pain patients there are other treatments that may be preferable. But for a substantial fraction of chronic pain patients, opioids appear to be the only medication that is sufficiently effective, justifying any side effects. Note also that these Cochrane studies refer only to non-cancer pain, whereas for terminal cancer patients—one of the main categories of pain patients addressed by the Lancet study—side effects that affect daily functioning may be even less important than pain relief.
There are clearly differences in how people respond to opioids, both in terms of efficacy of pain relief and severity of side effects, and for some chronic pain patients there are other treatments that may be preferable. But for a substantial fraction of chronic pain patients, opioids appear to be the only medication that is sufficiently effective, justifying any side effects. Note also that these Cochrane studies refer only to non-cancer pain, whereas for terminal cancer patients—one of the main categories of pain patients addressed by the Lancet study—side effects that affect daily functioning may be even less important than pain relief.