Propecia is a medicine for the treatment of male pattern baldness. The drug activates and enhances hair growth, prevents subsequent hair loss. The active ingredient of the drug is finasteride.

How does it work?

Finasteride stops the action of the substance under the action of which testosterone is converted into a more active form and reduces its concentration in the blood. The result lasts for 24 hours after oral administration. In addition to hair, this substance acts on the prostate gland, eliminating the symptoms of urinary tract obstruction.

Method of administration and dosage

Take 1 tablet daily or as directed by your doctor. The dosage is determined individually for each person, depending on the stage of the disease and general health, as well as the effect of the drug. If you missed the planned dose of Propecia, you should not take the double dose. Just wait for the next dose and take the dosage that your doctor prescribed.


There are some contraindications for taking Propecia, which limit its use and warn against complications. But contraindications do not apply to men because the drug is completely safe for them and there are practically no restrictions on use. Contraindications apply only to women who are strictly contraindicated to take this medicine. The drug is not intended for women suffering from baldness, it will not have an effect since it is aimed at treating male pattern baldness, and finasteride can negatively affect the future fetus.

Side effects

The safety of Propecia has been proven by many clinical trials, as well as by the successful action of the drug since 1998. The incidence of side effects is almost zero. Side effects are minor and not dangerous for the patient, therefore this drug is very popular and in demand.

In very rare cases, the drug causes the following side effects:

  • Decreased sex drive;
  • Decreased sperm;
  • Difficulty achieving an erection.

But these side effects were mild and passed quickly.


Patients received finasteride in a single dose up to 400 mg and in multiple doses up to 80 mg/day for 3 months experienced no undesirable effects. There are no recommendations for specific treatment of finasteride overdose.

Pregnancy and breastfeeding

Women who could potentially become pregnant or are pregnant should avoid contact with crushed Propecia tablets or tablets that have lost their integrity. The drug is able to suppress the conversion of testosterone to dihydrotestosterone and therefore can cause impaired development of the genital organs in the male fetus.

Interaction with other drugs

There is no clinically significant interaction of finasteride with other drugs. When the use of finasteride was combined with propranolol, digoxin, glibenclamide, warfarin, theophylline, angiotensin-converting enzyme inhibitors, paracetamol, acetylsalicylic acid, alpha-adrenergic blockers, blockers of calcium, beta-blockers, beta-blockers blockers of H2-histamine receptors, HMG-CoA reductase inhibitors, non-steroidal anti-inflammatory drugs, quinolones and benzodiazepines, no clinically significant drug interactions were found.

Special instructions

Before you start treatment, it is necessary to exclude diseases that can simulate benign prostatic hyperplasia, such as infectious prostatitis, prostate cancer, urethral stricture, hypotension of the bladder and a number of changes in the urinary system that occur in some diseases of the nervous system. Since finasteride may cause a decrease in prostate-specific antigen, during therapy, it is necessary to examine patients periodically to exclude prostate cancer.