What are methadones adverse reactions?
Deaths occur more frequently at the beginning of treatment in methadone programmes; they are usually a cause of excessive doses (i.e. erroneously estimated tolerance) and they are affected by concomitant diseases (hepatitis, pneumonia). Methadone generally entails the entire spectrum of opioid side effects, including the development of tolerance and physical and psychological dependence. Respiratory depressions are dangerous. The released histamines can cause hypotension or bronchospasms. Other symptoms are: constipation, nausea or vomiting, sedation, vertigo, oedema.
