The more you consume alcohol every day, the more likely you are to develop alcohol withdrawal symptoms when you discontinue alcohol consumption.
Use of methadone comes with similar side effects and risks as other opiates, including the development of tolerance and drug dependence.
The effects that users experience while on Ecstasy are similar to that stimulant drugs.
Opiate users who inject their drug of choice are at risk from infections from unsterile solutions, syringes, and needles which can cause illnesses such as liver disease, tetanus, and serum hepatitis.