Most of these side effects don't happen very often. Up to 10 percent of people who take naltrexone have nausea. If you get any of these side effects, tell your doctor. He or she may change your treatment or suggest ways you can deal with the side effect. You and your doctor have to decide this. Most people take the medicine for 12 weeks or more.
Naltrexone only has to be taken once a day. Be sure to take naltrexone just the way your doctor tells you to. Don't take extra pills, don't skip pills and don't stop taking pills until you talk to your doctor.
Already a member or subscriber? Log in. Interested in AAFP membership? Learn more. This handout is provided to you by your family doctor and the American Academy of Family Physicians.
This information provides a general overview and may not apply to everyone. Talk to your family doctor to find out if this information applies to you and to get more information on this subject. This content is owned by the AAFP. A person viewing it online may make one printout of the material and may use that printout only for his or her personal, non-commercial reference.
This material may not otherwise be downloaded, copied, printed, stored, transmitted or reproduced in any medium, whether now known or later invented, except as authorized in writing by the AAFP. Contact afpserv aafp. Naltrexone can be found in urine for up to six hours after the last dose. Most variants of oral naltrexone can be detected in a blood test for up to 24 hours. In addition, naltrexone can be detected for up to a day in a saliva test and up to 90 days in a hair follicle test.
Naltrexone medications such as Vivitrol can remain detectable in drug tests for more than 25 days. According to the U. The anti-craving effects of naltrexone last longer than many other medications. And naltrexone has a half-life of four to 13 hours in the body. The half-life of a medication refers to the time it takes for the active substance of the medication to reduce in half.
Naltrexone is normally taken before drinking and usually lasts the entire night, which is why only one tablet is advised per day. Like most medications, naltrexone can interact with other substances and cause severe side effects. Because naltrexone is used to treat alcohol and opioid addiction, individuals are advised to avoid these substances during treatment. The following medications can adversely interact with naltrexone:.
In addition, avoid using illicit substances while taking naltrexone as they can increase the side effects of the medication. Discuss all medications currently being taken, including over-the-counter medications and herbal supplements, with your doctor before naltrexone treatment. Individuals who wish to be on naltrexone treatment may initially undergo a naloxone challenge test before treatment.
This test is performed to evaluate physical dependence on opioids. You will be given naltrexone orally, as an intramuscular injection, or by IV. A positive test is suggestive of physical dependence and consists of common withdrawal symptoms.
If your naloxone challenge test is positive, or if you test positive for opioids, naltrexone treatment will be delayed in order to avoid causing opioid withdrawal symptoms. If you need help with your substance use disorder, we are here to help you build your confidence and momentum towards the future you want.
We provide treatment services for adults with alcohol, opioid, and other substance use disorders. Talk to your family doctor to find out if this information applies to you and to get more information on this subject. Alcohol withdrawal syndrome occurs when people who have had an alcohol abuse problem stop drinking. Symptoms can be mild….
Alcohol abuse is a pattern of drinking too much alcohol too often. This can harm your work, school, and…. Opioids are powerful medicines that treat pain. However, they can be addictive. Your doctor may be able to help…. Visit The Symptom Checker.
Read More. Prescription Nonsteroidal Anti-Inflammatory Medicines. How to Stop Steroid Medicines Safely. Chronic Pain Medicines. Cholesterol-lowering Medicines. Digoxin: A Medicine for Heart Problems. Path to improved health How does naltrexone work? How long will I take naltrexone?
Will I need other treatments for alcoholism? Examples of psychosocial treatments include: Alcoholics Anonymous or other support group meetings. Family therapy. Group therapy. Addiction treatment program. Hospital treatment. Things to consider Like any medicine, naltrexone can cause side effects.
Other side effects include: headache diarrhea constipation dizziness nervousness insomnia drowsiness anxiety If you get any of these side effects, tell your doctor.
Call your doctor right away if you experience any of the following symptoms: Blurry vision. Severe vomiting or diarrhea. Excessive fatigue.
Bleeding or bruising. Loss of appetite Pain in the upper right part of your stomach that lasts more than a few days.
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