Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg

Category- Allopathy

About Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg

Tamsulosin (MR) 0.4 mg + Dutasteride 0.5 mg is a medicine used to treat enlarged prostate (BPH) in men. It helps improve urine flow, reduces difficulty in passing urine, decreases frequent urination (especially at night), and lowers the risk of sudden urine blockage and prostate surgery. Tamsulosin works by relaxing the muscles in the prostate and urinary passage, while dutasteride works by slowly shrinking the enlarged prostate by lowering the hormone that causes prostate growth. Common side effects include dizziness, headache, low sexual desire, erection problems, ejaculation problems, runny nose, weakness, and breast tenderness. Rare but serious side effects can include fainting, severe allergy, painful erection, or severe low blood pressure when standing up. People with liver problems, low blood pressure, allergy to tamsulosin/dutasteride/finasteride, or those taking certain BP or prostate medicines should consult their doctor before use. Alcohol should be limited or avoided because it may increase dizziness and low blood pressure.

Medicine Highlights

Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg Uses

Tamsulosin (mr) 0.4 mg + Dutasteride 0.5 mg is an oral tablet medicine belonging to the category of antitubercular agents. Tamsulosin (mr) 0.4 mg + Dutasteride 0.5 mg is used to treat benign prostate hyperplasia.

Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg  side effects 

More Common

1. Dizziness  
2. Lightheadedness when standing up suddenly  
3. Headache  
4. Reduced sexual desire  
5. Trouble getting or keeping an erection  
6. Ejaculation problems / less semen  
7. Runny or blocked nose  
8. Weakness or tiredness  
9. Nausea  
10. Breast tenderness or enlargement 

Less Common 

1. Fainting  
2. Severe allergic reaction  
3. Painful or long-lasting erection (priapism)  
4. Severe low blood pressure  
5. Fast or irregular heartbeat  
6. Severe skin rash or peeling  
7. Chest pain 

How Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg works 

Tamsulosin (MR) 0.4 mg + Dutasteride 0.5 mg works in two ways to help men with enlarged prostate. Tamsulosin relaxes the muscles around the urine passage, which helps urine flow more easily and gives faster relief from symptoms like weak urine flow, difficulty passing urine, and frequent urination. Dutasteride works slowly by reducing the size of the enlarged prostate over time, which helps improve urine problems and lowers the chance of urine blockage.

Safety Measures and Warning 

Allergy or Hypersensitivity

If you have ever had a rash, itching, swelling, breathing problem, or severe allergic reaction after taking tamsulosin, dutasteride, finasteride, or similar medicines, avoid this medicine and tell your doctor.

Low blood Pressure

Tamsulosin (mr) 0.4 mg + Dutasteride 0.5 mg can lower blood pressure, especially when you stand up suddenly, and may cause dizziness or faintness. Get up slowly from sitting or lying down and consult a doctor immediately

Liver Problems

If you have liver disease, talk to your doctor before taking this medicine because both medicines are processed in the liver and may need caution. Severe liver disease has limited data.

Kidney Problems

If you have severe kidney problems, ask your doctor before using this medicine. Dose adjustment is usually not needed in mild-moderate cases, but severe cases should be monitored.

Before Cataract or Eye surgery

Tell your eye doctor if you are taking or have taken tamsulosin, because it can affect cataract or glaucoma surgery.

Pregnancy Warning

This medicine is not for women. Pregnant women or women who may become pregnant should not touch broken/leaking capsules, as dutasteride may harm a male baby and consult a doctor if you have any contact with the medicine.

Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg Interaction with Food Product 

Tamsulosin (MR) 0.4 mg + Dutasteride 0.5 mg should be taken 30 minutes after the same meal every day. Avoid or limit alcohol, as it can cause more dizziness and low blood pressure.

Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg  Interaction with Other Medicines  

Avoid taking Tamsulosin (mr) 0.4 mg + Dutasteride 0.5 mg with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:

Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg Chemical Structure

IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name

Tamsulosin- (R)-5-[2-[[2-(2-ethoxyphenoxy)ethyl]amino]propyl]-2-methoxybenzenesulfonamide hydrochloride.

Dutasteride-(1S,3aS,3bS,5aR,9aR,9bS,11aS)-N-[2,5-bis(trifluoromethyl)phenyl]-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,5,5a,6,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxamide

Intake routine/cycle

Daily dose

Take Tamsulosin (mr) 0.4 mg + Dutasteride 0.5 mg exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.

Missed Dose

If you forget to take your medicine, take the medication as soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.

Overdose

Do not take more than one the prescribed dose of Tamsulosin + Dutasteride in a day unless your doctor tells you to. Taking too much may cause severe dizziness, low blood pressure, fainting, fast heartbeat, and weakness. If you take an extra dose or feel unwell after taking it, contact your doctor immediately.

Storage

1. Store the medicine at room temperature. 
2. Keep away from sunlight and moisture. 
3. Keep out of reach of children 

Directions for use 

1. Take Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg exactly as prescribed by your doctor, at the same time each day 
2. Do not stop taking Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg without your doctor’s approval, even if you feel better. 
3. If you forget to take Tamsulosin 0.4 mg (MR) + Dutasteride 0.5 mg, take it as soon as you remember. If it’s almost time for your next dose, skip the missed dose. 

FAQ’s

What are the uses of Tamsulosin (mr) 0.4 mg + Dutasteride 0.5 mg ?

Tamsulosin is used in men with enlarged prostate to help urine pass more easily. It helps with weak urine flow, difficulty passing urine, frequent urination, and night-time urination.

What are the side effects of Tamsulosin (mr) 0.4 mg + Dutasteride 0.5 mg?

Common side effects are dizziness, headache, weakness, runny nose, and ejaculation changes. It may also cause low blood pressure or fainting in some people.

What is the drug class of Tamsulosin (MR) 0.4 mg + Dutasteride 0.5 mg?

Tamsulosin belongs to a group of medicines called alpha blockers. It works by relaxing the muscles around the urine passage.

What is the mechanism of action (MOA) of Dutasteride?

Dutasteride works by reducing the hormone (DHT) that causes the prostate to enlarge and also contributes to hair loss in men. This helps shrink the prostate slowly over time.

What are the side effects of Dutasteride in males?

Common side effects are low sex drive, erection problems, less semen during ejaculation, and breast tenderness or swelling.

Are Dutasteride tablets used for hair loss?

Yes, dutasteride may be used for male pattern hair loss in some men because it lowers DHT, which causes hair fall. It should be used only if a doctor advises.

Reference  

1. PubChem. Dutasteride [Internet]. Nih.gov. PubChem; 2026 [cited 2026 Mar 24]. Available from 
2. Dutasteride [Internet]. go.drugbank.com. Available from 
3. PubChem. Tamsulosin [Internet]. pubchem.ncbi.nlm.nih.gov. Available from 
4. Drugbank. Tamsulosin [Internet]. go.drugbank.com. 2005. Available from 

Siva Krishna Adithya Bhumireddy

Siva Krishna Adithya Bhumireddy completed a Bachelor of Pharmacy from GIET School of Pharmacy, affiliated with Andhra University, and from his 3rd year of graduation, he was working as a freelance medical and publication writer. Having expertise in systematic reviews and clinical research. With his keen interest and skills in research and documentation practices, he also reviewed more than 150 manuscripts from international journals like Elsevier, Springer Nature, and Sage Journals, and all the manuscripts were indexed and appeared in PubMed, Scopus, and Web of Science databases, and he received honorary recognition letters and certificates from all of them. Siva Krishna Adithya also published a few systematic, narrative reviews and a few chapters of international expertise.