Are there any side effects from methadone?

Yes. All opioids cause nausea, itching, sedation, confusion, constipation, hormone depletion, depression, loss of libido, also possibly hyperalgesia (paradoxical increase in pain). Methadone is unique in changing heart rhythms at higher doses that can cause sudden cardiac dearh.
Definitely! Methadone is a very serious drug. It has great benefit in the right situations. It's use shold not be taken lightly and should be dispensed by a professional well versed in it's use. Side effects may be none all the way to death. Mixing alcohol, other medications and other drugs increases your risk for tremendous adverse effects and shold be avoided. Discuss Methadone use thoroughly with your.