Methadone Recommended dosage The initial dose of methadone is 40 mg daily administered in single or divided doses. After achieving initial dosing of about 40 mg daily, the dose should be increased since there is evidence that the relapse rate is significantly lower in patients on 80-100 mg daily rather than 40-50 mg daily. The stabilization to maintenance dosing requires one to three months. The minimum effective dose is 60 mg daily taken at once or in divided doses. Patients on lower maintenance doses have recently been studied and have shown shorter treatment retention and have continued heroin use. If patients are stable on methadone for six months or longer, their methadone dose should not be increased by 33% or over, as this sudden increase in dose is associated with an increase in craving for the drugs that were previously abused. Some heroin patients need to be on doses up to 180 mg daily to provide adequate maintenance and to prevent relapse.
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