In order to be admitted to methadone treatment, U.S. Food and Drug Administration standards require:

A minimum of one year of addiction to opiates as well as current evidence of opiate addiction. Special circumstances apply to opiate dependent pregnant women, who may be admitted without demonstration of the one-year minimum.

Applicant must also be over 18 years of age.

If the applicant is under 18, (s)he must have parental consent and demonstrate at least two prior treatment episodes in either drug free treatment or short-term tapering.

Methadone treatment is voluntary and available to persons of any sex, ethnicity, and physical or mental condition, including pregnant women and mentally ill substance abusers.