Ademetionine (S-adenosylmethionine, or SAMe) is a naturally occurring compound found throughout the body, involved in numerous biochemical processes. As a medicine, it is used to treat certain liver conditions (particularly intrahepatic cholestasis), depression, and osteoarthritis. It is a prescription medicine in many countries, though marketed as a dietary supplement in the United States.

• Therapeutic Class: Hepatoprotective agent / mood and joint health supplement.

• Pharmacological Class: Methyl-group donor involved in methylation and transsulfuration pathways.

• Drug Family: Naturally occurring sulfur-containing compounds.

• ATC Classification: A16AA02 (Ademetionine).

• Approved (in countries where licensed as a drug): Intrahepatic cholestasis (impaired bile flow within the liver), including in pregnancy and pre-cirrhotic conditions; also studied and used for depression and osteoarthritis.

• Commonly used for: Patients with liver-related cholestasis, and, in some markets, as an adjunct for depressive symptoms or osteoarthritis joint pain.

• Off-label use (only under medical guidance): Sometimes explored for fibromyalgia, migraine, and other conditions in research settings; evidence varies by indication.

• Oral tablets (enteric-coated): commonly 400 mg and 500 mg.

• Injection (intravenous/intramuscular): available in some markets, commonly 500 mg per vial, for initial treatment of more severe cholestasis before switching to oral tablets.

Ademetionine acts as a methyl-group donor in the body's methylation reactions, and also participates in a pathway (transsulfuration) that produces glutathione, an important antioxidant, particularly relevant to liver health. In cholestatic liver disease, ademetionine is thought to help restore normal bile flow and support liver cell membrane function; in depression and osteoarthritis, its role is less fully understood but has shown effects comparable to some standard treatments in various studies.

• Standard dose (liver disease/cholestasis): Initial dose often 400-800 mg once or twice daily, sometimes preceded by a course of intravenous/intramuscular ademetionine (e.g., 500 mg daily) in more severe cases before switching to oral tablets.

• Condition-wise dose (depression): Commonly 800-1600 mg daily, in divided doses, in studies and clinical use.

• Condition-wise dose (osteoarthritis): Often started at 600 mg daily for the first 2 weeks, then reduced to 400 mg daily for maintenance.

• Route: Oral, tablets taken on an empty stomach (enteric-coated tablets should be swallowed whole, not crushed or chewed); intravenous/intramuscular injection where used, administered by a healthcare professional.

• Missed dose: Take as soon as remembered; if close to the next scheduled dose, skip the missed one and resume the regular schedule — don't double up.

• Overdose: Limited data on significant overdose; may worsen known side effects such as anxiety or gastrointestinal upset; requires medical attention.

• Common: Mild gastrointestinal upset (nausea, diarrhoea), headache, and mild anxiety or insomnia.

• Serious: Can worsen manic episodes in patients with bipolar disorder; may increase homocysteine levels, a cardiovascular risk marker, with long-term use.

• Emergency symptoms: Signs of a manic episode (in patients with bipolar disorder), or a severe allergic reaction.

• Recovery advice: Mild digestive symptoms often settle with continued use or dose adjustment; taking a multivitamin containing folic acid, B12, and B6 is sometimes recommended alongside ademetionine, given its effect on related metabolic pathways.

• Pregnancy: Used for cholestasis of pregnancy specifically under medical guidance in some countries; should not be used in the first trimester without careful medical assessment.

• Breastfeeding: Not recommended, as it is unknown whether it passes into breast milk and affects the infant.

• Liver disease: One of its established uses, though used with medical supervision; severe hepatic impairment requires caution.

• Kidney disease: Used with caution and medical supervision in severe renal impairment.

• Elderly: Used with routine monitoring; no specific major restriction based on age alone.

• Children: Not typically recommended for use in children under 18 without specific medical guidance.

• SSRIs, tricyclic antidepressants, and MAO inhibitors: ademetionine can enhance serotonergic effects, increasing the risk of serotonin syndrome; combined use should be avoided or closely supervised.

• Tramadol and other serotonergic pain medicines: similar serotonin syndrome risk when combined.

• Levodopa (for Parkinson's disease): combined use requires medical guidance given potential metabolic interactions.

• Alcohol: increases dizziness risk and may worsen liver strain when combined with ademetionine.

• Liver function tests periodically when used for cholestatic liver disease.

• Mood and mental state monitoring, particularly in patients with a history of bipolar disorder.

• Homocysteine levels with long-term use, given ademetionine's effect on this cardiovascular risk marker.

Ursodeoxycholic acid (UDCA, another treatment for cholestatic liver conditions), standard antidepressants (for depression), NSAIDs or other analgesics (for osteoarthritis) — alternative options depending on the specific condition being treated.

Sometimes used alongside a multivitamin containing folic acid, vitamin B12, and B6, given ademetionine's role in related metabolic pathways; not typically combined with other antidepressants without medical guidance, given the serotonin syndrome risk.

• Liver Disease / Cholestasis Treatments

• Depression Adjunct Therapies

• Osteoarthritis Supportive Care

1. Difference Between Osteoarthritis And Rheumatoid Arthritis

2. 10 Mental Health Tips for Working Professionals

3. Anxiety & Depression Rates In India

4. Anxiety Treatment: Therapy and Medications

5. Early Signs of Depression in Patients - Caregiver Guide

1. https://www.mrmed.in/molecule/ademetionine

2. https://pubmed.ncbi.nlm.nih.gov/7527320/

The information on this page is for educational purposes only and is not a substitute for medical advice. Please consult your doctor to know if this treatment is appropriate for your condition.