Brand Names : ReVia
Before Using This Medicine
In deciding to use a medicine,
the risks of taking the medicine must be weighed against the good it will
do. This is a decision you and your doctor will make. For naltrexone, the
following should be considered:
Allergies - Tell your doctor if you have ever had any unusual or
allergic reaction to naltrexone. Also tell your health care professional if
you are allergic to any other substances, such as foods, preservatives, or
Pregnancy - Naltrexone has not been studied in pregnant women.
However, studies in animals have shown that naltrexone causes unwanted effects
when given in very large doses. Before taking this medicine, make sure your
doctor knows if you are pregnant or if you may become pregnant.
Breast-feeding - It is not known whether naltrexone passes into
the breast milk. However, this medicine has not been reported to cause problems
in nursing babies.
Children - Naltrexone has been tested only in adult patients
and there is no specific information about its use in patients up to 18 years
Older adults - Many medicines have not been studied specifically
in older people. Therefore, it may not be known whether they work exactly
the same way they do in younger adults or if they cause different side effects
or problems in older people. There is no specific information comparing the
use of naltrexone in the elderly with use in other age groups.
Other medicines - Although certain medicines should not be used
together at all, in other cases two different medicines may be used together
even if an interaction might occur. In these cases, your doctor may want to
change the dose, or other precautions may be necessary. When you are taking
naltrexone, it is especially important that your health care professional
know if you are taking any of the following:
Opioid (Narcotic) analgesics
(e.g., butorphanol [e.g., Stadol], codeine, hydrocodone [e.g., Hycodan], hydromorphone
[e.g., Dilaudid], levorphanol [e.g., Levo-Dromoran], meperidine [e.g., Demerol],
methadone [e.g., Dolophine], morphine [e.g., MSIR], nalbuphine [e.g., Nubain],
oxycodone [e.g., Roxicodone], propoxyphene [e.g., Darvon]) or
other - The effects of these medications may be blocked by naltrexone.
Alternative medications for relief of pain should be used in patients receiving
naltrexone. Naltrexone may cause withdrawal in patients dependent on narcotics.
Other medical problems - The presence of other medical
problems may affect the use of naltrexone. Make sure you tell your doctor
if you have any other medical problems, especially:
Hepatitis or other liver disease - The chance of side effects
may be increased