Finasteride for hair loss – reviews, effects, and side effects

Excessive hair loss can affect anyone, regardless of age or gender. Hair is a crucial element of one’s appearance, which is why most people struggle to come to terms with losing it. For men experiencing hair loss, finasteride is a primary treatment option used to manage the condition and mitigate the effects of balding. In the article below, we explain what it is and the results it delivers.

What is finasteride?

Finasteride is a medication used to treat hair loss, particularly androgenetic alopecia. It works by inhibiting the conversion of testosterone into its active form, dihydrotestosterone (DHT). DHT is nearly five times more potent than the base form and is responsible for regulating hair growth in the body. While present in both men and women, finasteride is used solely to treat hair loss in men.

If the body is hypersensitive to dihydrotestosterone, hair follicles begin to shrink and weaken. This results in hair loss and noticeable thinning. In answer to the question of what finasteride is, it can be described as an oral medication designed to reduce DHT production and used to treat male pattern baldness.

On the Polish pharmaceutical market, finasteride is available under numerous brand names—both as oral tablets (e.g., the popular Finapil, Nezyr, or Proscar, which patients often split) and as modern topical formulations such as sprays or solutions (e.g., Finjuve). Regardless of the chosen form, the active substance works in the same way by blocking the enzyme responsible for DHT production.

Efficacy of finasteride

Opinions regarding finasteride are very positive. When used regularly to treat hair loss, finasteride significantly halts the shedding process in approximately 80% of men. Furthermore, it stimulates the growth of new hair. New hair growth is most noticeable at the crown of the head, while results at the temples and the front of the scalp are less dramatic. However, it is important to remember that the medication must be taken consistently over a long period to halt hair loss. Typically, about six months after starting treatment, the rate of hair loss slows down noticeably, and new hair begins to grow.

Many patients ask during consultations whether finasteride must be taken for life. The answer is yes; the treatment is long-term. Since androgenetic alopecia is a progressive, genetically determined condition, discontinuing the medication causes the process of hair follicle miniaturization and hair loss to revert to its initial state within 9 to 12 months. Finasteride halts the effects of the hormone but does not eliminate the genetic cause of the problem.

Finasteride – side effects

Virtually any prescription medication can cause side effects, and finasteride therapy is no exception. Potential side effects include mood changes, temporary fertility issues, and the possibility of erectile dysfunction or reduced libido. For this reason, the dosage is tailored to the individual patient. These side effects are generally not severe; issues with semen quality occur in approximately 5% of men, while a temporary drop in sex drive affects about 2%.

How long do you need to take finasteride to see results?

Finasteride, like many other medications used to treat hair loss, takes time to show its full effects. Typically, the first visible results of using finasteride can be observed after about 3 to 6 months of regular use.

However, to achieve the full effect, this medication usually needs to be used for about 12 months. For many men, finasteride begins to slow the rate of hair loss within the first few months, followed by the growth of new hair.

However, it is important to understand that finasteride does not work the same way for everyone. Some men may notice results sooner, while others may require more time. The extent of the effects can also vary—some may see a significant increase in hair density, whereas others might only notice a slowing of hair loss.

Remember that consistency is key when using finasteride. To achieve optimal results, the medication should be taken daily. If treatment is interrupted, all effects may disappear within 9 to 12 months of stopping therapy.

Finasteride for hair loss in women

Finasteride is not approved for treating hair loss in women, though it can be administered to them. It is primarily used in postmenopausal women; for women of childbearing age, the pros and cons must always be carefully weighed beforehand. In women, it is used off-label at a dosage of 2.5–5 mg. Studies have shown that the 1 mg dose (used for men) yields no benefits for women.

Finasteride is used in women who are also taking contraceptives or who are postmenopausal. The younger the patient and the less severe the hair loss, the better the therapeutic results that can be achieved. Some studies indicate that the best treatment outcomes are seen in women under the age of 60, whereas those over 70 show no benefit at all.

Side effects and adverse reactions following finasteride administration in women are uncommon and include, among others, headache, menstrual disorders, breast pain, dizziness, or—very rarely—hypertrichosis.

The effectiveness of finasteride treatment in women can be assessed after at least six months to a year of use. However, given the chronic nature of hair loss, patients who respond to the therapy must continue it to maintain the results achieved. A marked inhibition of DHT production can be observed after approximately one week of treatment.

Tips for using finasteride:

The use of finasteride should always be in accordance with a doctor’s recommendations. Here are a few tips to help ensure the treatment is as effective and safe as possible:

What to do:

• Consistency: Finasteride works best when used regularly. It is not a drug that acts immediately—it takes time to show results. Try taking it at the same time every day to make this easier.
• Patience: The effects of finasteride are not immediate. It may take 3 to 6 months to notice any changes, and the full effects might not be visible until after a year of regular use.
• Consultation with a doctor: Visit your doctor regularly to monitor your progress and discuss any side effects. If you have any questions or concerns, consult your doctor.

What to avoid:

• Stopping treatment: Stopping finasteride may cause the effects of treatment to disappear. If you decide to stop treatment, talk to your doctor first.
• Overdosing: Do not exceed the recommended dose of finasteride in the hope of achieving faster or stronger results. Doing so may increase the risk of side effects.
• Pregnancy: Finasteride is a Category X drug for pregnant women, meaning it can cause serious birth defects in the fetus. Women who are pregnant or planning a pregnancy should avoid contact with finasteride.