“All opioids can cause sweating and flushing, but methadone is perhaps worse to cause sweating than other opioids. Buprenorphine also can cause sweating, but it is usually less of a problem than for patients on methadone.
We don’t know exactly why opioids make people sweat, but it is related to opioids’ effects on the thermoregulatory centers of the brain.
Excess sweating can also be caused by opioid withdrawal. If other withdrawal symptoms are present, like runny nose, muscle aches, or nausea, an increase of the methadone dose may help reduce the sweating.
At least half of all patients on methadone report unpleasant sweating, but some patients have sweats that are more than just inconvenient. These patients report dramatic, soaking sweats, bad enough to interfere with life.
What can we do about this sweating?”
Source: Dr. Jana Burson – July 20, 2015