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Weight gain and edema on methadone maintenance therapy
The International Journal of the Addictions
|April 1, 1979
Summary
Methadone (HCl) treatment for heroin addiction may cause significant fluid retention and edema in some patients. Discontinuing or reducing methadone dosage resolved swelling, suggesting a link to the medication.
Area of Science:
- Pharmacology
- Clinical Medicine
- Addiction Treatment
Background:
- Methadone hydrochloride (HCl) is a widely used opioid agonist therapy for opioid use disorder.
- It is prescribed to approximately 80,000 individuals in the U.S. for heroin addiction treatment.
- Methadone is generally considered to have a favorable side effect profile regarding non-narcotic adverse events.
Observation:
- This report details three cases of substantial fluid gain (edema) among 420 patients in a methadone program.
- No prior history of edema was noted in these patients.
- The swelling appeared 3-6 months after starting methadone or increasing the dose.
Findings:
- A strong correlation was observed between methadone dosage and fluid retention.
- Edema resolved in all three patients when methadone dosage was reduced or treatment was discontinued.
- Weight loss occurred concurrently with the resolution of edema.
Implications:
- Clinicians should be aware of the potential for methadone-induced fluid retention.
- Further research is warranted to understand the mechanism of methadone-associated edema.
- Monitoring for and managing fluid retention may be crucial for patients on methadone therapy.