Naltrexone
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Molecule Summary
| Uses | Treatment of Alcohol dependence, Opioid dependence. |
| Therapy | Deaddiction |
| Side Effects | Nausea, Vomiting, Insomnia, Anxiety, Restlessness, Joint pain, Muscle pain. |
Medicines
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Molecule Description
Naltrexone is a prescription medicine mainly used to treat opioid dependence and alcohol dependence.
Uses
- Treatment of Alcohol dependence
- Treatment of Opioid dependence
Contraindications
When should one not use Naltrexone
- If you are allergic to any component of Naltrexone.
- If you have suicidal thoughts.
- If you are pregnant or breastfeeding.
- If you are below 18 years of age.
- If you have severe renal impairment.
- If you have severe hepatic impairment.
- If you have acute hepatitis.
- If you are currently using opioid medicines or are in opioid withdrawal.
Side effects
Common side effects of this drug are:
- Nausea
- Vomiting
- Insomnia (difficulty in sleeping)
- Anxiety
- Restlessness
- Joint pain
- Muscle pain
Precautions and Warnings
Pregnancy
Breast Feeding
Driving
Alcohol
Other General Warnings
Talk to your doctor if
- You experience any severe side effects.
- You are pregnant or planning to conceive or breastfeeding.
- Your symptoms do not improve, or there is worsening of your condition.
- You have severe liver impairment.
- You have renal impairment.
- You are taking prescription and non-prescription medications, herbal products, vitamins and nutritional supplements or plan to take as there is a chance of interaction.
Mode of Action
How Does It Work?
Naltrexone belongs to the class of medications called 'opioid-antagonist'. This medicine works by blocking the effect of opioid receptors. Thus, resulting in blocking the euphoric and sedative effects of opioids and alcohol, decreasing cravings and urges to use alcohol or opioids.
Interactions
Interactions with other medicines
- Interaction with high dose opioids with Naltrexone can lead to life-threatening opioid poisoning from respiratory and circulatory impairment.
- Interaction with Methadone in substitution treatment increases the risk of the onset of withdrawal syndrome.
- Interaction with antidepressants (amitriptyline, doxepin, trimipramine), antipsychotic (thioridazine), antibiotics (clarithromycin), anti-rheumatic (leflunomide), sedative (droperidol), Opioid (codeine), Central antihypertensives, (alpha-methyldopa) etc., can also cause some severe side effects.
Interactions with food items
- You can continue with the usual diet as food doesn't influence the effect of Naltrexone. Speak with your doctor about any supplements or herbal drinks you are currently taking before using this medicine.
Dosage
Overdose
Overdose of Naltrexone can lead to toxicity or poisoning. Symptoms of overdose include nausea, vomiting, seizures and respiratory failure. Seek emergency medical treatment or contact your doctor immediately if you experience these symptoms.
Missed a Dose
Missed doses of Naltrexone should be taken right away unless it is almost time for the next dose. In that case, you should skip the forgotten dose (rather than taking a double dose) or call your doctor for further instructions. Do not take both doses at once as it can lead to overdose.
Frequently Asked Questions (FAQs)
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