Tamsulosin and Finasteride: What’s Your Drug of Choice?

Flomax Capsules (Tamsulosin)

Tamsulosin is a drug that treats the symptoms of a condition known as benign prostatic hyperplasia (BPH) or the enlargement of the prostate. This drug is manufactured by Boehringer Ingelheim GmbH, a large international pharmaceutical company that marketed the drug under the name Flomax. Tamsulosin is not itself a cure but only rids of BPH’s symptoms such as urinary tract infection (UTI), kidney infections and bladder problems. This drug is not only used for BPH but Tamsulosin may also be prescribed by doctors for clearing or passing kidney stones. Tamsulosin is an alpha-blocker drug that relaxes the prostate muscles and the bladder neck, making urination easier for men afflicted with BPH. This drug is not for women and children as it was only formulated for men with prostate problems.

Finasteride, on the other hand, is also a drug that relieves the symptoms of BPH. This drug is manufactured by Merck and marketed it under two brand names which are Proscar, the 5mg Finasteride, and Propecia, the one with 1mg Finasteride. Proscar is the brand used for the treatment of symptoms of BPH. In this condition, the prostate enlarges due to the conversion of the male hormone testosterone to a different hormone known as dihydrotestosterone or DHT. The increase of DHT in the body is responsible not only for the enlargement of the prostate but also for hair loss in men (androgenic alopecia) since DHT has a mechanism of action in the body that reduces the blood circulation to the follicles which shrink them, depriving them of nutrition.

Proscar Tablet Pack

What Finasteride does is it prevents the conversion of testosterone into DHT by blocking the enzyme known as 5-alpha reductase, decreasing the amount of DHT in the body.

Both Tamsulosin and Finasteride are prescription drugs and will only be sold to customers with valid prescriptions from their doctors. The difference between Tamsulosin and Finasteride in the way they work in treating BPH is that Tamsulosin only relaxes the muscles in the prostate to enable the patient to urinate properly. Finasteride does the same but by inhibiting the conversion of testosterone to DHT and decreasing the DHT levels in the male body, this drug also decreases the size of the prostate effectively, preventing the need for surgeries.

Finasteride may seem to be a better drug but the side effects of using it may actually be worse than the condition that it is trying to treat. Finasteride use is known to cause erectile dysfunction and other sexually related problems like decreased libido and reduction of semen in ejaculation. There are also other side effects that may be experienced by its users such as breast lumps, testicular pains, nipple discharges and the inability to urinate. The use of this drug is also known to develop an advanced form of prostate cancer which far worse than the discomforts of BPH. The use of Finasteride is only known to show improvements in the patient’s condition after 12 months of use so patients have to continue using the drug before feeling some improvements in their condition.

Tamsulosin may not reduce the size of the prostate like Finasteride but it will provide relief to the patient by treating the symptoms of BPH. The only side effects associated with the use of this drug are a runny nose, prolonged erection of the penis (priapism), a sudden drop in blood pressure, ejaculation problems (rare) and dizziness.

Tamsulosin and Finasteride Tablets

Flomax or Tamsulosin is only available in oral capsule form and has lower dosages compared to Finasteride. The dosage strengths of Tamsulosin is only 0.2mg and 0.4mg. Finasteride (Proscar), meanwhile, is a drug in pill form and the only dosage strength for its brand Proscar is 5mg. Since both these drugs are prescription drugs, it means that the customers have to first pay their doctors before going to the local pharmacy. It is very important for the patients to discuss their entire medical history with their doctors for them to maximize the treatment and to avoid any complications with their current health. Males with glaucoma, serious liver disease and especially hypotension should not take Tamsulosin because the additional decrease in the blood pressure that will be caused by the drug may make the user vulnerable to having a heart attack or a stroke. For Finasteride, only patients with liver disease and urinary obstruction are prohibited from taking the drug.

Finasteride and Tamsulosin Interaction

When it comes to drug interactions, Finasteride has the fewer at only 12 moderate and 1 minor drug interaction, a total of 13 drugs that patients should be careful not to take with it. For Tamsulosin, it has a total of 438 drug interactions, 37 of them are major, 397 are moderate and 4 minor drugs.

Finasteride and Flomax (Tamsulosin) Drug Interactions

Taking Finasteride and Tamsulosin require an advice from a medical professional to avoid the adverse effects that may be caused by the drug interactions. For a complete list of drugs to avoid when taking these medicines, customers can go to Drugs.com.

Tamsulosin and Finasteride Dose

Depending on the condition of the patient, the doctor will prescribe a specific dosage regimen for the patients to follow. But these drugs are usually taken once a day, with or without meals. These drugs should never be chewed, crushed or broken before they are taken and should stay intact as they are swallowed. If the doctor did not prescribe a specific dosage regimen, patients can follow the instructions on the drug’s label.


For treating BPH, customers can either choose Tamsulosin or Finasteride as their medicine of choice. Tamsulosin only relieves the symptoms of BPH while Finasteride has additional effects of decreasing the size of the enlarged prostate. In side effects, Finasteride has the more serious ones but in drug interactions, Tamsulosin has more. In the end, it is the doctor’s recommendation that the patient should follow for the best results in their treatment. To purchase affordable generics of these drugs online, customers should check our list of top recommended pharmacies.