My husband has been changed from avodart to finasterida all drug information is in spanish?

HI there THE NAME IN ENGLISH IS FINASTERIDE

FIRST OF ALL I AM NOT A DOCToR..OK JUST TRYING TO HELP
I will try and give you all the info I am able to.ok

What Is Finasteride?
Finasteride (marketed under the brand names Propeciaand Proscar) is a prescription medicine that has been licensed for the following uses:

Treatment of male pattern baldness.

Treatment of enlarged prostate. An enlarged prostate is also known medically as benign prostatic hyperplasia, benign prostatic hypertrophy, or BPH.

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How Does It Work?
Finasteride works by blocking the conversion of testosterone into DHT (dihydrotestosterone), which decreases the amount of DHT in the body. Since DHT is important for enlargement of the prostate, using finasteride to decrease DHT levels can treat an enlarged prostate. The medication helps to shrink the prostate in most men, helping with their BPH symptoms.

DHT is also important for male pattern baldness. By decreasing the amount of DHT, the medication can help stop hair loss and regrow hair

Effectiveness for BPH
There have been several studies looking at how well finasteride treats an enlarged prostate. In particular, there has been one very large study that studied several of the effects of finasteride for men with BPH, with the following results:

Symptoms of BPH
The men in this study were asked to rate the following symptoms of BPH:

Decreased size and force of urine stream
Feeling of incomplete bladder emptying when urinating
Delayed or interrupted urination
Having to get up to urinate frequently during the night
Having to urinate frequently during the day
Needing to strain or push the flow of urine.

The men who took finasteride had significant improvement in their BPH symptoms compared to the men who did not take finasteride. While some patients saw improvement right away, in general, it took about six months to see the improvement for most men. This improvement lasted throughout the entire study period (four years).

Acute Urinary Retention
This study also looked at how many men had acute urinary retention. If an enlarged prostate is very severe, a man may not be able to urinate at all. This is known medically as acute urinary retention and usually requires catheterization (inserting a small tube through the penis into the bladder in order to empty the urine).

The most common side effects of finasteride include:

Erectile dysfunction (ED) or impotence (see Propecia Sexual Side Effects or Proscar Sexual Side Effects)
Decreased libido (decreased sex drive)
Decreased ejaculate amount
Breast enlargement.

These rare but possible finasteride side effects include, but are not limited to:

Signs of an allergic reaction, including unexplained skin rash, itching, hives, unexplained swelling, wheezing, or difficulty breathing or swallowing

Breast tenderness (also report any breast enlargement, breast lumps, or breast discharge)

Testicular pain.

I hope I have helped you both!