Finastéride pour l'hypertrophie de la prostate
Proscar
Revu par Sid DajaniDernière mise à jour par Michael Stewart, MRPharmSDernière mise à jour 16 mai 2024
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Finasteride is for men only. It must not be taken by women, children or adolescents.
Take one tablet each day.
Your symptoms may start to improve within a few weeks, although it can take up to six months for you to notice the full benefit.
En un coup d'œil
Finasteride is a medicine used to treat an enlarged prostate gland in men.
It works by shrinking the prostate, helping you pass urine more easily.
Take one tablet daily, at the same time each day, with or without food.
It can take up to six months to feel the full benefit of the treatment.
Pregnant women should not handle the tablets due to potential harm to an unborn baby.
Discuss any side-effects, such as reduced sex drive, with your doctor.
Rarely, finasteride has been linked to breast cancer and depression in men.
About finasteride
Type de médicament | 5-alpha reductase inhibitor |
Utilisé pour | Enlargement of the prostate gland in men |
Aussi appelé | Proscar® |
Disponible sous forme de | Comprimés |
The prostate gland commonly becomes larger in older men. L'élargissement de la glande prostatique est également appelé hyperplasie bénigne de la prostate (HBP). The prostate gland is situated close to the bladder, so its enlargement can cause problems with passing urine. Common symptoms that are experienced are having to wait before your urine starts to flow, taking longer at the toilet, dribbling urine, and a feeling that your bladder is not quite empty.
Finasteride works by blocking the conversion of the hormone testosterone to the more potent hormone dihydrotestosterone. It does this by blocking an enzyme called 5-alpha reductase. Dihydrotestosterone is partly responsible for making the prostate enlarge. Therefore, a reduced amount of dihydrotestosterone in the prostate causes it to shrink. This helps you to pass urine more easily.
Small doses of finasteride are prescribed for men with hair loss. A completely different brand of finasteride tablet is prescribed for men with this condition. There is more information about the tablets used for this in a medicine leaflet called Finastéride pour la calvitie masculine.
Before taking finasteride
Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking finasteride it is important that your doctor knows:
Si vous avez déjà eu une réaction allergique à un médicament.
Si vous prenez ou utilisez d'autres médicaments. Cela inclut tous les médicaments que vous prenez et qui sont disponibles à l'achat sans ordonnance, ainsi que les médicaments à base de plantes et complémentaires.
How to take finasteride
Before you start the treatment, read the manufacturer's printed information leaflet from inside the pack. It will give you more information about finasteride and will provide you with a full list of the side-effects which you may experience from taking it.
Take finasteride exactly as your doctor tells you to. Take one 5 mg tablet each day.
You can take the tablet either before or after a meal, but try to take it at the same time of day each day. This will help you to remember to take your doses regularly.
If you forget to take a dose on time, take it when you remember. If you do not remember until the following day, skip the missed dose. Do not take two doses together to make up for a forgotten dose.
Tirer le meilleur parti de votre traitement
Your symptoms may start to improve within a few weeks although it can take up to six months for you to notice the full benefit. This is because it takes time for the prostate gland to gradually shrink. Because of this, it is important that you continue to take the tablets regularly, even if you don't feel a benefit straightaway.
Remember to keep your regular appointments with your doctor. This is so your doctor can check on your progress.
Consider reducing or stopping the amount of caffeine you drink (commonly found in tea, coffee and cola) and alcohol. These can make your symptoms worse, so drinking less of these things may benefit you.
If you are a smoker, stopping smoking may significantly improve your symptoms. This is because nicotine irritates the bladder. Ask your doctor for advice on quitting.
Each time you collect a new supply of tablets from your pharmacy, make sure they look to be the same as you have had before. This is because there is a low-dose brand of finasteride tablet available for the treatment of a different condition. If you are unsure that you have the correct tablets, ask your pharmacist to check for you.
Finasteride may cause harm to an unborn baby. Because of this, women who are pregnant should not handle the tablets. Also, small amounts of finasteride will be in your semen while you are taking this medicine, and it is therefore recommended that you use a barrier method of contraception (such as a condom) if your partner could become pregnant. If you need further advice about this, speak with your pharmacist or doctor.
If you are having an operation or any medical treatment, tell the person carrying out the treatment that you are taking finasteride. This is because it can interfere with a blood test used to detect prostate cancer, so you must tell your doctor about taking finasteride if you need this test.
Can finasteride cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the most common ones associated with finasteride. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.
Common finasteride side-effects (these affect fewer than 1 in 10 men) | Que puis-je faire si je ressens cela ? |
Reduced desire to have sex, inability to get an erection, breast tenderness | Si l'un de ces éléments devient problématique, parlez-en à votre médecin |
Important: if you develop any pain or lumps in your breast area, or any discharge from your nipples, you should tell your doctor. This is because there have been a few rare reports of breast cancer in men taking 5-alpha reductase inhibitors like finasteride and dutasteride.
Important : there have been reports of depression in men taking finasteride, and in rare cases, thoughts of self-harming. Patient alert cards are now included with your medicine alerting you to this fact. You should share this information with your family or friends so that they can be alert for any changes in your mood. If you develop any signs of depression whilst being treated with finasteride, or you have any concerns about your mood, make an appointment to see your doctor.
If you are taking finasteride for prostate problems, you should continue to take your medication until you have spoken with your doctor and agreed a plan.
If you are taking finasteride (Propecia) for male pattern baldness, you should stop taking this medication and make an appointment to see your doctor.
In addition, taking finasteride has caused problems with sexual function in some men, including loss of libido and problems maintaining an erection. This has sometimes continued after stopping treatment. Speak with your doctor if you are concerned about this.
Si vous ressentez d'autres symptômes que vous pensez être dus au médicament, parlez-en à votre médecin ou à votre pharmacien pour obtenir des conseils supplémentaires.
How to store finasteride
Gardez tous les médicaments hors de la portée et de la vue des enfants.
Conserver dans un endroit frais et sec, à l'abri de la chaleur et de la lumière directes.
Informations importantes sur tous les médicaments
Informations importantes sur tous les médicaments
Ne prenez jamais plus que la dose prescrite. Si vous soupçonnez que vous ou quelqu'un d'autre avez pris une surdose de ce médicament, rendez-vous au service des urgences de votre hôpital local. Emportez le contenant avec vous, même s'il est vide.
If you buy any medicines, always check with a pharmacist that they are safe to take alongside your prescribed medicines.
Ce médicament est pour vous. Ne le donnez jamais à d'autres personnes, même si leur état semble être le même que le vôtre.
Ne gardez pas de médicaments périmés ou indésirables. Apportez-les à votre pharmacie locale qui s'en débarrassera pour vous.
Si vous avez des questions concernant ce médicament, demandez à votre pharmacien.
Signaler les effets secondaires d'un médicament ou d'un vaccin
Si vous ressentez des effets secondaires, vous pouvez les signaler en ligne via le Site web de Yellow Card.

Vous n'êtes pas sûr de mélanger des médicaments ?
Vérifiez les interactions possibles entre les médicaments, les compléments et les aliments avant de les prendre ensemble.
Questions fréquemment posées
Can I stop taking finasteride for enlarged prostate once my symptoms improve?
It is important that you continue to take finasteride regularly, even if your symptoms improve. Your doctor will monitor your progress and advise on the duration of treatment. Do not stop taking your medication until you have spoken with your doctor and agreed a plan.
How long will I need to take finasteride for prostate enlargement?
The article does not specify a duration of treatment for finasteride. It mentions that it can take up to six months to notice the full benefit and that you should keep regular appointments with your doctor to check your progress. Your doctor will advise you on how long you need to continue taking the medication.
Are there any lifestyle changes I can make to help my prostate symptoms while taking finasteride?
Yes, you can consider reducing or stopping caffeine, alcohol, and smoking. Caffeine and alcohol can worsen bladder symptoms, and nicotine irritates the bladder. Discussing quitting smoking with your doctor may also help improve your symptoms.
Why is it important for pregnant women not to handle finasteride tablets?
Finasteride may cause harm to an unborn baby. Therefore, women who are pregnant should not handle the tablets to avoid any potential exposure.
Can finasteride affect my blood tests for prostate cancer?
Yes, finasteride can interfere with a blood test used to detect prostate cancer. It is important to inform the person carrying out any medical treatment or testing that you are taking finasteride.
What should I do if I feel depressed or have concerns about my mood while taking finasteride?
There have been reports of depression and, in rare cases, thoughts of self-harm in men taking finasteride. Patient alert cards are included with the medicine to highlight this. You should share this information with family or friends so they can be alert to changes in your mood. If you develop any signs of depression or have concerns about your mood, make an appointment to see your doctor.
Lectures complémentaires et références
- Manufacturer's PIL, Proscar® 5 mg film-coated Tablets; Organon Pharma (UK) Limited, The electronic Medicines Compendium. Dated October 2023.
- Médicaments Complets BNF 89e Édition; Association Médicale Britannique et Société Royale Pharmaceutique de Grande-Bretagne, Londres.
À propos de l'auteurVoir la biographie complète

Michael Stewart, MRPharmS
Responsable de l'examen des notices de médicaments – Contractuel, Pharmacien
BPharm (Hons), MRPharmS
Michael est un pharmacien communautaire exerçant dans les Midlands et le South Yorkshire avec plus de 20 ans d'expérience dans le conseil sur les médicaments et les conditions médicales. Il possède une solide expérience en formation dans le domaine de la santé, ayant produit et dispensé des cours de formation pour les équipes de pharmacie et le personnel des établissements de soins résidentiels, y compris les infirmières. Il a également contribué aux comités consultatifs de pharmacie pour la gestion des affections de faible gravité dans la communauté.
À propos du critique

Sid Dajani
Sultan Dajani a obtenu son diplôme à la London School of Pharmacy en 1994 et est devenu le plus jeune membre élu du conseil de la Royal Pharmaceutical Society depuis sa fondation en 1842.
Historique de l'article
Les informations sur cette page sont rédigées et examinées par des cliniciens qualifiés.
Article également disponible en Anglais, Allemand, Espagnol, Français, Italien, Portugais, Hindi, Hébreu, Arabe, and Suédois.
Prochaine révision prévue : 17 avr. 2027
16 mai 2024 | Dernière version

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