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Revia Side Effects Center
Medical Editor: Melissa Conrad Stöppler, MD
Revia (naltrexone) is a special narcotic drug that blocks the effects of other narcotic medicines and alcohol. It is used to treat narcotic drug or alcohol addiction and is taken orally in tablet form. Side effects can include weakness, insomnia, increased thirst, anxiety, nervousness, or muscle aches. Other side effects may occur.
Naltrexone has been shown to increase the incidence of early fetal loss in animal studies. There are no adequate and well-controlled studies of Revia in pregnant women. Revia (naltrexone) should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. The drug was shown to be excreted in breast milk in animal studies, but it is not known whether it is excreted in human milk.
Our Revia Side Effects Drug Center provides a comprehensive vie w of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is Patient Information in Detail?
Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.
Revia in Detail - Patient Information: Side Effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using naltrexone oral and call your doctor at once if you have any of these serious side effects:
- blurred vision or eye problems;
- fast heartbeat;
- mood changes, hallucinations (seeing or hearing things), confusion, thoughts of hurting yourself;
- nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
- ear pain, ringing in your ears;
- skin rash or itching; or
- wheezing, difficulty breathing.
Less serious side effects may include:
- feeling anxious, nervous, restless, or irritable;
- feeling light-headed, fainting;
- increased thirst;
- muscle or joint aches;
- weakness or tiredness;
- sleep problems (insomnia); or
- decreased sex drive, impotence, or difficulty having an orgasm.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Read the entire detailed patient monograph for Revia (Naltrexone) »
What is Patient Information Overview?
A concise overview of the drug for the patient or caregiver from First DataBank.
Revia Overview - Patient Information: Side Effects
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Sudden opiate withdrawal symptoms can occur within minutes after taking naltrexone. Tell your doctor immediately if any of these withdrawal symptoms occur: abdominal cramps, nausea/vomiting, diarrhea, joint/bone/muscle aches, mental/mood changes (e.g., anxiety, confusion, extreme sleepiness, visual hallucinations), runny nose.
Naltrexone has rarely caused serious liver disease. The risk is increased when larger doses are used. This increased risk is balanced by improved likelihood of taking this drug as directed and ease of use when this drug is taken less often (e.g., every other day). Discuss the risks and benefits with your doctor. (See also Warning section.)
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Read the entire patient information overview for Revia (Naltrexone)»
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Revia FDA Prescribing Information: Side Effects
During two randomized, double-blind placebo-controlled 12-week trials to evaluate the efficacy of REVIA as an adjunctive treatment of alcohol dependence, most patients tolerated REVIA well. In these studies, a total of 93 patients received REVIA at a dose of 50 mg once daily. Five of these patients discontinued REVIA because of nausea. No serious adverse events were reported during these two trials.
While extensive clinical studies evaluating the use of REVIA in detoxified, formerly opioid-dependent individuals failed to identify any single, serious untoward risk of REVIA use, placebo-controlled studies employing up to fivefold higher doses of REVIA (up to 300 mg per day) than that recommended for use in opiate receptor blockade have shown that REVIA causes hepatocellular injury in a substantial proportion of patients exposed at higher doses (see WARNINGS and PRECAUTIONS, Laboratory Tests).
Aside from this finding, and the risk of precipitated opioid withdrawal, available evidence does not incriminate REVIA, used at any dose, as a cause of any other serious adverse reaction for the patient who is “opioid-free.” It is critical to recognize that REVIA can precipitate or exacerbate abstinence signs and symptoms in any individual who is not completely free of exogenous opioids.
Patients with addictive disorders, especially opioid addiction, are at risk for multiple numerous adverse events and abnormal laboratory findings, including liver function abnormalities. Data from both controlled and observational studies suggest that these abnormalities, other than the dose-related hepatotoxicity described above, are not related to the use of REVIA.
Among opioid-free individuals, REVIA administration at the recommended dose has not been associated with a predictable profile of serious adverse or untoward events. However, as mentioned above, among individuals using opioids, REVIA may cause serious withdrawal reactions (see CONTRAINDICATIONS, WARNINGS, DOSAGE AND ADMINISTRATION).
Reported Adverse Events
REVIA has not been shown to cause significant increases in complaints in placebo-controlled trials in patients known to be free of opioids for more than 7 to 10 days. Studies in alcoholic populations and in volunteers in clinical pharmacology studies have suggested that a small fraction of patients may experience an opioid withdrawal-like symptom complex consisting of tearfulness, mild nausea, abdominal cramps, restlessness, bone or joint pain, myalgia, and nasal symptoms. This may represent the unmasking of occult opioid use, or it may represent symptoms attributable to naltrexone. A number of alternative dosing patterns have been recommended to try to reduce the frequency of these complaints.
In an open label safety study with approximately 570 individuals with alcoholism receiving REVIA, the following new-onset adverse reactions occurred in 2% or more of the patients: nausea (10%), headache (7%), dizziness (4%), nervousness (4%), fatigue (4%), insomnia (3%), vomiting (3%), anxiety (2%) and somnolence (2%).
Depression, suicidal ideation, and suicidal attempts have been reported in all groups when comparing naltrexone, placebo, or controls undergoing treatment for alcoholism.
RATE RANGES OF NEW ONSET EVENTS
|Depression||0 to 15%||0 to 17%|
|Suicide Attempt/Ideation||0 to 1%||0 to 3%|
Although no causal relationship with REVIA is suspected, physicians should be aware that treatment with REVIA does not reduce the risk of suicide in these patients (see PRECAUTIONS).
The following adverse reactions have been reported both at baseline and during the REVIA clinical trials in opioid addiction at an incidence rate of more than 10%:
Difficulty sleeping, anxiety, nervousness, abdominal pain/cramps, nausea and/or vomiting, low energy, joint and muscle pain, and headache.
The incidence was less than 10% for:
Loss of appetite, diarrhea, constipation, increased thirst, increased energy, feeling down, irritability, dizziness, skin rash, delayed ejaculation, decreased potency, and chills.
The following events occurred in less than 1% of subjects:
Excessive gas, hemorrhoids, diarrhea, ulcer.
Painful shoulders, legs or knees; tremors, twitching.
Increased frequency of, or discomfort during, urination; increased or decreased sexual interest.
Depression, paranoia, fatigue, restlessness, confusion, disorientation, hallucinations, nightmares, bad dreams.
Eyes-blurred, burning, light sensitive, swollen, aching, strained; ears-“clogged,” aching, tinnitus.
Data collected from postmarketing use of REVIA show that most events usually occur early in the course of drug therapy and are transient. It is not always possible to distinguish these occurrences from those signs and symptoms that may result from a withdrawal syndrome. Events that have been reported include anorexia, asthenia, chest pain, fatigue, headache, hot flushes, malaise, changes in blood pressure, agitation, dizziness, hyperkinesia, nausea, vomiting, tremor, abdominal pain, diarrhea, palpitations, myalgia, anxiety, confusion, euphoria, hallucinations, insomnia, nervousness, somnolence, abnormal thinking, dyspnea, rash, increased sweating, vision abnormalities, and idiopathic thrombocytopenic purpura.
In some individuals the use of opioid antagonists has been associated with a change in baseline levels of some hypothalamic, pituitary, adrenal, or gonadal hormones. The clinical significance of such changes is not fully understood.
Adverse events, including withdrawal symptoms and death, have been reported with the use of REVIA in ultra rapid opiate detoxification programs. The cause of death in these cases is not known (see WARNINGS).
In a placebo controlled study in which REVIA was administered to obese subjects at a dose approximately five-fold that recommended for the blockade of opiate receptors (300 mg per day), 19% (5/26) of REVIA recipients and 0% (0/24) of placebo-treated patients developed elevations of serum transaminases (i.e., peak ALT values ranging from 121 to 532; or 3 to 19 times their baseline values) after three to eight weeks of treatment. The patients involved were generally clinically asymptomatic, and the transaminase levels of all patients on whom follow-up was obtained returned to (or toward) baseline values in a matter of weeks.
Transaminase elevations were also observed in other placebo controlled studies in which exposure to REVIA at doses above the amount recommended for the treatment of alcoholism or opioid blockade consistently produced more numerous and more significant elevations of serum transaminases than did placebo. Transaminase elevations occurred in 3 of 9 patients with Alzheimer's Disease who received REVIA (at doses up to 300 mg/day) for 5 to 8 weeks in an open clinical trial.
Drug Abuse And Dependence
REVIA is a pure opioid antagonist. It does not lead to physical or psychological dependence. Tolerance to the opioid antagonist effect is not known to occur.
Read the entire FDA prescribing information for Revia (Naltrexone) »
Additional Revia Information
Revia - User Reviews
Revia User Reviews
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Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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