Naltrexone is an antagonist of opioid. It works by reducing the desire for alcohol and blocking the effect of drugs and opiate drugs.


What is Naltrexone?

Coupled with trauma counseling and social support, Naltrexone helps those who have stopped drinking or taking drugs not to give in to the addiction.


How should Naltrexone be taken?

Naltrexone is taken orally via tablet form. During treatment at home, a tablet is taken once a day whenever necessary, whereas in the hospital or clinic, it can be administered once a day or every 2-3 days except on Sundays.


Side effects associated with Naltrexone

Possible side effects of Naltrexone include the following:

  • Anxiety
  • Increase or decrease in energy
  • Dizziness
  • Constipation
  • Diarrhea
  • Pain or stomach cramps
  • Muscle or joint aches
  • Insomnia
  • Irritability
  • Headache
  • Nausea
  • Nervousness
  • Loss of appetite
  • Increased crying
  • Rash
  • Drowsiness
  • Vomiting


It is important to seek immediate medical attention if taking Naltrexone triggers:

  • Sound or visual hallucinations
  • Confusion
  • Vision problems
  • Vomiting or severe diarrhea


Contraindications and warnings associated with the use of Naltrexone

Naltrexone should not be used by those who still use drugs or drink excessive amounts of alcohol.


Before taking the drug, it is important to inform the doctor:

  • If you have any allergic reactions to naltrexone, naloxone, other opioids or any other medication
  • If you are taking or have taken (within the last 10 days) any narcotics, drugs, methadone, medication against diarrhea, cough medicine or painkillers
  • If you have taken other medications, herbal remedies or supplements. Mentioning in particular: disulfiram and thioridazine
  • If you suffer (or have suffered) from depression or kidney problems
  • If you are pregnant or breast-feeding


It is also important to inform surgeons and dentists of any ongoing treatment with Naltrexone.