Naltrexone should not be taken by pregnant women. It is not
known if the medication gets into breast milk, however,
breastfeeding mothers should better avoid using Naltrexone,
too. Naltrexone should be avoided by patients with acute
hepatitis, or severe liver or kidneys problems. The
medication should not be combined with drugs that contain
opioids, such as codeine and morphine (they include some
painkillers and cough medicines). One must stop taking
any sorts of narcotics 7 to 10 days before treatment
with Naltrexone is started, because the medication can
cause severe withdrawal symptoms before the person is
detoxified. In case with alcohol, the period of abstinence
should be at least 5 days prior to starting treatment.
And of course, Naltrexone must not be used if a patient
is allergic to it.
