Adinot Tablet

Adinot acts as a competitive antagonist at opioid receptor sites. It blocks the action of opioids and precipitates withdrawal symptoms in opioid-dependent individuals.


Adinot is used for the treatment of alcohol dependence and for the blockade of the effects of exogenously administered opioids. Adinot has not been shown to provide any therapeutic benefit except as part of an appropriate plan of management for the addictions.

Adinot is also used to associated treatment for these conditions: Alcohol Dependency, BMI >30 kg/m2, Cholestatic pruritus, Opioid Dependence, Severe Pain

Trade Name Adinot
Generic Naltrexone
Other Names Naltrexon, Naltrexona, Naltrexone, Naltrexonum
Weight 50mg
Type Tablet
Formula C20H23NO4
Weight Average: 341.4009
Monoisotopic: 341.162708229
Protein binding

21% bound to plasma proteins over the therapeutic dose range.

Therapeutic Class Antidote preparations
Manufacturer Beximco Pharmaceuticals Ltd
Available Country Bangladesh
Last Updated: June 23, 2021 at 11:23 am


Adinot dosage

Opioid dependence: 

  • Initially: 25 mg; increase to 50 mg daily if no withdrawal signs occur.
  • Maintenance: 350 mg wkly given as 50 mg daily or divided in 3 doses (given on 3 days of the wk) for improved compliance.

Adjunct in alcohol dependence: 50 mg daily.

Side Effects

Abdominal pain, nausea, vomiting; anxiety, insomnia, lethargy, headache, musculoskeletal pain; anorexia, diarrhoea, constipation; increased thirst; chest pain; chills, dizziness; sexual dysfunction; rash, liver function abnormalities and reversible idiopathic thrombocytopenia. Inj-site reactions.


Hepatic or renal impairment. Monitor LFTs regularly. Patients should be opioid-free for at least 7-10 days prior to initiating naltrexone therapy. Strictly warn patients against the use of opioids while on naltrexone. Monitor for inj-site reactions. Pregnancy, lactation. History of bleeding disorders (including thrombocytopenia).


May reduce effects of opiate-containing preparations e.g. those used for cough and cold, diarrhoea and pain. Increased or decreased serum levels with drugs that alter hepatic metabolism. Potentially increased hepatotoxic effects with disulfiram. Increased risk of naltrexone-induced lethargy and somnolence with thioridazine. May increase insulin requirements.

Food Interaction

  • Take with or without food. The absorption is unaffected by food.

Volume of Distribution

  • 1350 L [intravenous administration]

Half Life

4 hours for naltrexone and 13 hours for the active metabolite 6 beta-naltrexol.


  • ~ 3.5 L/min [after IV administration]

Pregnancy & Breastfeeding use

Pregnancy Category C. Either studies in animals have revealed adverse effects on the foetus (teratogenic or embryocidal or other) and there are no controlled studies in women or studies in women and animals are not available. Drugs should be given only if the potential benefit justifies the potential risk to the foetus.


Patients concurrently dependent on opioids; acute hepatitis or hepatic failure; acute opioid withdrawal; patients on therapeutic opioid analgesics.

Acute Overdose

Symptoms: Clonic-tonic convulsions and respiratory failure. 

Management: Supportive and symptomatic.

Storage Condition

Store at 20-25° C.

Adinot contains Naltrexone see full prescribing information from innovator Monograph