side effects methadone
Common side effects of methadone include anxiety, nervousness, restlessness, insomnia, weakness, drowsiness, dry mouth, nausea, vomiting, diarrhea, constipation, loss of appetite, and decreased sex drive. Weight gain can also be a common side effect of methadone.ethadone is a medication used to relieve severe pain. It's also used to prevent withdrawal symptoms in people who are addicted to opiate drugs such as morphine, hydrocodone, oxycodone, and fentanyl.