
Naltrexone is a medication that is used to treat alcohol use disorder and opioid use disorder. It works by reducing cravings for alcohol and opioids and suppressing the rewarding effects of these substances. While naltrexone can be effective in reducing alcohol intake, it is important to note that it does not prevent the functional impairments associated with alcohol use, such as loss of motor coordination and reduced response time. It is recommended that individuals taking naltrexone abstain from alcohol before starting treatment and do not use naltrexone as a way to drive or perform other activities while under the influence of alcohol. Naltrexone may also cause withdrawal symptoms in individuals who are still using opioids, so it is important to be free from opioids for a period of time before starting naltrexone treatment.
| Characteristics | Values |
|---|---|
| Alcohol abstinence before starting Naltrexone | It is recommended to abstain from alcohol before starting treatment with Naltrexone. However, there are no significant dangers associated with drinking alcohol while on Naltrexone. |
| Treatment duration | Treatment should begin at a dose of 25 mg daily, with an increase to 50 mg during the first week. Treatment for at least 4 months is indicated, with follow-up monthly for up to a year. |
| Effectiveness | Naltrexone is effective in reducing alcohol intake and cravings but may not promote abstinence from alcohol. Acamprosate is considered slightly more effective at helping people remain off alcohol. |
| Side effects | Naltrexone may cause dizziness, drowsiness, and a decreased response time. It can also cause depression in some patients. It does not treat withdrawal symptoms but can cause them if patients stop drinking. |
| Interactions | Naltrexone should not be used to enable activities that require alertness, such as driving. It can be dangerous when combined with opioids and may render opiate analgesics ineffective. |
| Treatment program | Naltrexone treatment should be part of a counseling program that includes support groups and other behavioral techniques. |
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What You'll Learn

Naltrexone is not a cure for addiction
Naltrexone is a medication that may be prescribed to treat people recovering from alcohol use disorder (AUD) or opioid use disorder (OUD). It is not a cure for addiction and should be used as part of an overall program that includes counselling, support group meetings, and other treatments recommended by a healthcare provider. Naltrexone works by blocking the euphoric and rewarding feelings associated with opioids and alcohol, reducing cravings and minimising the reinforcement of continued use.
It is important to note that naltrexone is not a cure for addiction. While it can be an effective component of comprehensive treatment plans, it should be combined with behavioural therapies and counselling to address underlying issues and provide optimal chances of sustained recovery. Naltrexone treatment typically lasts for three to four months, and patients should be monitored even after they stop taking it.
Additionally, naltrexone will not prevent individuals from becoming impaired when drinking alcohol or using opioids. It does not block the physical effects of intoxication, such as reduced coordination or reflexes, or poor judgement. As a result, driving or performing other activities while under the influence of alcohol or opioids with naltrexone can still be dangerous. Furthermore, naltrexone may cause dizziness and drowsiness, further impacting an individual's ability to perform certain tasks safely.
Before starting naltrexone treatment, patients must not be physically dependent on alcohol or other substances. It is recommended to undergo a period of alcohol detoxification or abstinence before initiating naltrexone treatment to ensure greater effectiveness. Patients should also refrain from drinking alcohol while taking naltrexone, as it can lead to serious side effects such as nausea and vomiting.
Naltrexone is generally well-tolerated, but it is crucial to consult a healthcare provider to weigh the risks and benefits of taking this medication. It is also important to disclose any medical history, including mental health disorders, and to notify all healthcare providers, dentists, and pharmacists about naltrexone usage.
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It is used to treat alcohol and opioid use disorders
Naltrexone is a medication that can be used to treat alcohol and opioid use disorders. It works by blocking the effects of opioids, specifically the euphoric and rewarding feelings that make people want to use them. It also blocks the euphoric and rewarding feelings that may make people want to use alcohol. It is important to note that naltrexone is not a cure for addiction and does not prevent impairment when drinking alcohol or using opioids. In fact, naltrexone can cause withdrawal symptoms in people who are no longer taking opioids or alcohol. Therefore, it is recommended that individuals be free from opioids for 7 to 14 days before starting naltrexone treatment, and it should be used in conjunction with a counselling program that includes support groups or other behavioural techniques.
Naltrexone is available in pill form (brand names: Depade and ReVia) and as an extended-release injectable form (Vivitrol). It is typically well-tolerated and has few side effects, although it can cause dizziness and drowsiness, affecting an individual's ability to drive or operate machinery. It is also important to note that naltrexone does not treat withdrawal symptoms but instead suppresses cravings for alcohol or opioid drugs. This makes it a useful tool in reducing alcohol intake and aiding in recovery from addiction.
The Sinclair Method, a treatment for alcohol use disorders, suggests that individuals take naltrexone about one hour before drinking alcohol. Research has shown that this method can significantly reduce alcohol cravings and intake compared to the standard use of naltrexone, which involves taking it in the morning and attempting to remain abstinent from alcohol. However, it is important to note that naltrexone should not be used as a way to drive or perform other activities while under the influence of alcohol, as it does not prevent impairment.
Naltrexone has been the subject of various studies, including animal studies in the 1980s that established its effectiveness in decreasing alcohol consumption through its action at the opiate receptors. Human clinical trials have also confirmed that naltrexone, when combined with psychosocial therapy, can reduce cravings for alcohol and decrease relapse rates. The American Psychiatric Association published a practice guideline in 2007 that acknowledged naltrexone's potential in attenuating some of the reinforcing effects of alcohol, although data on its long-term efficacy is limited.
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It suppresses cravings for alcohol and opiates
Naltrexone is a prescription medication that is used to treat opioid use disorder and alcohol use disorder. It is not a cure for addiction but can help patients stay drug-free and maintain their recovery. The medicine works by blocking the effects of opioids, especially the euphoric and rewarding feelings that make people want to use them. It also blocks the feelings of intoxication ("the buzz") from alcohol, reducing cravings over time.
Naltrexone is a pure opiate receptor antagonist, primarily binding at the mu opioid receptors. By binding to these receptors, it suppresses the amount of alcohol consumed by modifying how the hypothalamus, pituitary gland, and adrenal gland (hypothalamic-pituitary-adrenal axis, HPA axis) interact. It is important to note that naltrexone does not prevent impairment while drinking alcohol or using opioids. Patients may still experience loss of motor coordination, decreased response time, and slowed rates of thinking.
To avoid precipitated opioid withdrawal, it is recommended to have an opioid-free interval of a minimum of 7 to 14 days before starting naltrexone treatment. This duration may vary depending on the type of opioid previously used and the patient's medical history. A medically-supervised opioid withdrawal process may be necessary for some patients.
While naltrexone can effectively suppress cravings for alcohol and opiates, it should be used as part of a comprehensive treatment program. This may include counselling, attending support group meetings, and other behavioural techniques recommended by a healthcare provider. It is also imperative to inform all healthcare providers, including doctors, dentists, and pharmacists, about the use of naltrexone to ensure safe and effective treatment.
It is worth noting that naltrexone may cause some side effects, such as dizziness, drowsiness, and depression in some patients. It is advised not to drive or operate heavy machinery until individuals know how naltrexone affects them. Additionally, patients should inform their healthcare providers if they have any history of mental health disorders or allergies before starting treatment with naltrexone.
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It does not prevent impairment when drinking alcohol
Naltrexone is a medication used to treat alcohol use disorder and opioid use disorder. It is designed to reduce and suppress cravings for alcohol or opioid drugs by blocking the euphoric and rewarding feelings associated with their consumption. While naltrexone may block the feelings of intoxication or the "buzz" from alcohol, it is important to note that it does not prevent impairment when drinking alcohol.
When drinking alcohol while taking naltrexone, individuals will still experience functional impairments associated with alcohol use. These impairments can include a loss of motor coordination, decreased response time, and problems with slowed rates of thinking. Even though individuals may not feel drunk, these impairments can make activities such as driving or operating heavy machinery dangerous. Naltrexone may also cause side effects such as dizziness and drowsiness, which can further impact an individual's ability to perform certain tasks safely.
It is recommended that individuals do not use naltrexone to enable them to drive or perform other activities while under the influence of alcohol. Naltrexone is intended to be used as part of a comprehensive treatment program that includes counselling, support groups, and other behavioural techniques recommended by a healthcare provider. It is not a cure for addiction and should not be relied upon solely to prevent intoxication or impairment from alcohol consumption.
Additionally, it is important to note that combining naltrexone and alcohol can present certain issues. Naltrexone can cause withdrawal symptoms in individuals who are still using opioids or who have recently stopped. It is recommended to be free from opioids for 7 to 14 days before starting naltrexone treatment, depending on the specific opioid. Individuals with moderate to severe alcohol use disorders may also experience withdrawal symptoms if they stop drinking while taking naltrexone, which can potentially be fatal due to the development of seizures. Therefore, it is crucial to consult with a healthcare professional before starting naltrexone treatment and to have ongoing medical supervision during the treatment process.
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It is more effective after a period of abstinence
Naltrexone is a medication used to treat alcohol and opioid use disorders. It works by blocking the effects of opioids, including the euphoric and rewarding feelings that make people want to use them. It also blocks the euphoric and rewarding feelings that may make people want to use alcohol. It is important to note that naltrexone does not treat withdrawal symptoms; instead, it suppresses cravings for alcohol or opioid drugs.
While naltrexone can be effective in reducing alcohol intake, it may be more effective after a period of abstinence. One study showed that a period of alcohol detoxification or abstinence before naltrexone treatment is associated with greater effectiveness. This is because naltrexone blocks the feelings of intoxication or the "buzz" from alcohol, but it does not prevent functional impairment, such as reduced coordination, decreased response time, or poor judgment. Therefore, it is recommended that individuals do not use naltrexone to enable them to drive or perform other activities while under the influence of alcohol.
Additionally, naltrexone can cause withdrawal symptoms in individuals who are still using opioids or who have recently stopped. It is recommended to be free from opioids for 7 to 14 days before starting naltrexone treatment, depending on the specific opioid used. A medically-supervised opioid withdrawal process may be necessary.
It is important to note that naltrexone is not a cure for addiction. It should be used as part of a comprehensive treatment program that includes counseling, support groups, and other behavioral techniques recommended by a healthcare provider. Naltrexone is typically well-tolerated and has few side effects, but it can cause dizziness and drowsiness. Individuals taking naltrexone should inform their healthcare providers and carry identification stating their use of the medication.
In summary, while naltrexone can be effective in reducing alcohol intake, it may be more effective when combined with a period of abstinence. This is supported by research showing that naltrexone blocks the rewarding effects of alcohol, which can help reduce cravings and decrease relapse rates. However, it is important to seek professional advice and guidance when considering naltrexone as a treatment option for alcohol or opioid use disorders.
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Frequently asked questions
It is recommended that you abstain from alcohol before starting treatment with naltrexone. Naltrexone is used to treat alcohol use disorder and opioid use disorder. It is designed to reduce and suppress cravings for alcohol or opiate drugs. It does not prevent the impairment caused by drinking alcohol, such as loss of motor coordination, decreased response time, and poor judgment.
Combining naltrexone and alcohol can present certain issues. Naltrexone does not prevent the functional impairments associated with alcohol use, and it is not a cure for addiction. It is designed to suppress cravings and aid in recovery from addiction.
Naltrexone is usually well-tolerated and has few side effects. However, it may cause dizziness, drowsiness, and a decreased alertness in some people. It can also cause depression in some patients.
Naltrexone is an opioid antagonist that binds to the opioid receptors in the brain, thereby removing any opiate drugs on these receptors and suppressing cravings. It blocks the euphoric and rewarding feelings associated with alcohol and opioid use.
Treatment with naltrexone should be for at least 4 months, with follow-up appointments every month for up to a year. It is important to consult with a healthcare professional to determine the appropriate treatment duration and dosage.




















