Can I get it?
Yes, if a doctor decides it is right for you. Naltrexone is authorised in the EU and can be prescribed after a medical review.
Naltrexone · Vienna
Naltrexone in Vienna.
Not in our consultation yet. We are continuously onboarding new specialists — leave your email and we'll notify you, or explore the three areas we already cover.
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NOT AVAILABLE TODAY
Hi-Doctor does not prescribe Naltrexone yet.
Our licensed doctors currently focus on three areas with solid clinical evidence and a clear EU regulatory framework. We extend the catalogue as specialists join and regulation allows. Naltrexone is outside the current scope.
Buying Naltrexone online without a valid prescription carries counterfeiting and toxicity risks. Always consult a licensed healthcare professional.
IN PLAIN TERMS
What Naltrexone is, and how to get treatment
Naltrexone blocks the opioid receptors in the brain. In EU countries it is authorised, as part of a wider treatment programme, to help people with alcohol dependence and people who have come off opioids and want to stay off them. "Low-dose naltrexone" (LDN), taken at a fraction of the licensed dose for pain or fatigue conditions, is not an authorised medicine anywhere in the EU — it is compounded and used off-label. Hi-Doctor treats hair loss, weight management and sexual health, and does not treat alcohol or opioid dependence.
Naltrexone is an authorised medicine in the EU, so a licensed doctor can prescribe it when it is clinically appropriate for you.
What can I take instead?
Our doctors review every option and recommend what fits your history and goals.
What do the studies show?
Every trial behind Naltrexone is listed below with its registry number, how many people took part, and whether the results are peer-reviewed or a company announcement.
Jump to the studiesWHAT WE DO COVER
If your question fits one of these three areas, a licensed doctor reviews it in less than 2 hours on average for €35.
TREATMENTS
Three categories, one process.
Choose what fits. The journey is identical.
ONGOING PLANWeight loss
A medical consultation on your weight goal. Treatment if appropriate.
€25/month28-day treatment cycle
Explore weight lossONE-OFFSexual health
An absolutely discreet consultation for intimate concerns.
€35 one-offFull refund if not approved
Explore sexual healthONGOING PLANHair growth
Medical assessment and tailored treatment for hair loss.
€15/monthBilled €45 every 90 days
Explore hair growthLicensed EU doctors
Doctor review in less than 2 hours on average
50,000+ patients served
Secure patient account
VERIFIED EVIDENCE
Naltrexone: evidence and regulatory guide.
WHAT IT IS
How it works
Blocks opioid receptors in the brain, so opioid drugs cannot produce their effect and the rewarding sensation from alcohol is blunted.
- mu-opioid receptor
DEVELOPMENT STAGE
EU-authorised medicine
Trial register1 registered trials
Every NCT identifier links to its ClinicalTrials.gov record. A readout is not the same as peer-reviewed publication.
| TRIAL / NCT | POPULATION | PARTICIPANTS | STATUS | READOUT / COMPLETION |
|---|---|---|---|---|
| COMBINE (Combined Pharmacotherapies and Behavioral Interventions for Alcohol Dependence)NCT00006206 | Recently abstinent adults with a primary diagnosis of alcohol dependence, across 11 US academic sites | 1,383 | Read out | 2006-05-03 |
What the studies reported
Results are grouped by source and evidence grade so journal data and manufacturer announcements cannot be confused.
Peer-reviewed
Anton RF, O'Malley SS, Ciraulo DA, et al. Combined pharmacotherapies and behavioral interventions for alcohol dependence: the COMBINE study: a randomized controlled trial. JAMA 2006;295(17):2003-2017. doi:10.1001/jama.295.17.2003| DOSE OR GROUP | MEAN WEIGHT CHANGE | WEEKS |
|---|---|---|
| naltrexone 100 mg daily with medical management | 80.6% of days abstinent, versus 75.1% with placebo plus medical management | 16 |
| naltrexone 100 mg daily with medical management | Hazard ratio for time to a heavy drinking day 0.72 (97.5% CI 0.53–0.98; P=.02) | 16 |
Naltrexone was tested alongside structured medical management and counselling, not on its own; the size of the benefit was modest and depended on that surrounding support.
NAMED SAFETY SIGNALS
What has been reported with Naltrexone.
Must be opioid-free before starting
Taking naltrexone while opioids are still in the body precipitates acute withdrawal, so a documented opioid-free interval and supervision are required before the first dose.
Blocks opioid pain relief
While on naltrexone, opioid painkillers will not work normally — this matters in an accident or emergency, and patients are advised to carry a warning card.
Common side effects
Nausea, headache, dizziness, anxiety and difficulty sleeping.
Liver
Liver function is monitored; naltrexone is not used in acute hepatitis or liver failure.
Low-dose naltrexone (LDN) is not an authorised product
LDN — roughly a tenth of the licensed dose, taken for pain, fatigue or autoimmune conditions — has no EU marketing authorisation. It is compounded and used entirely off-label, and systematic reviews of it in fibromyalgia report mixed results from small trials rather than regulatory-grade evidence.
HOW IT WORKS · 5 STEPS
Five steps. No waiting room.
From the online consultation to ongoing follow-up — without leaving home.
- 5 minutes
Start your online visit
Answer a 5-minute health questionnaire from home.
- Less than 2 hours
A doctor reviews your case
A licensed doctor reviews your answers and replies personally.
- Refund guarantee
Review and payment
If not approved, we refund your €35 one-off in full.
- EU pharmacies
Collect treatment from the pharmacy
Collect it at any EU pharmacy with your e-prescription.
- 4-week check-in
Ongoing support
Private chat, 4-week check-in, simple prescription renewal.
NOTIFY ME
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FREQUENTLY ASKED QUESTIONS