Methadone Hydrochloride (cont.)
Medical and Pharmacy Editor:
In this Article
- What Is Methadone Hydrochloride and How Does It Work?
- What Are Side Effects Associated with Using Methadone Hydrochloride?
- What Other Drugs Interact with Methadone Hydrochloride?
- What Are Warnings and Precautions for Methadone Hydrochloride?
What Are Side Effects Associated with Using Methadone Hydrochloride?
Side effects of methadone include:
- Agitation
- Anticholinergic effects (dry mouth, palpitation, fast heart rate)
- Cardiac arrest
- Chest pain
- Coma
- Constipation
- Dizziness
- Drowsiness
- Feeling uneasy
- Euphoria
- Heart attack (myocardial infarction)
- Itching and hives
- Lightheadedness or fainting
- Mental clouding or depression
- Nausea
- Nervousness
- Respiratory arrest
- Respiratory/circulatory depression
- Restlessness
- Seizures
- Severe cardiac arrhythmias
- Shock
- Slow heart rate
- Sweating, flushing, warmness of face/neck/throat
- Urinary retention, urinating less than usual
- Visual disturbances
- Vomiting
- Weakness
This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.
Medically Reviewed by a Doctor on 4/14/2017
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