Finasteride Teva

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Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Finasteride Teva

Quick Facts

Property Description
Active ingredient Finasteride (INN)
Form Film-coated tablet
Pharmacological class Steroid reductase inhibitor / 5α-reductase inhibitor
Common use Regulation of androgen metabolism
Origin Synthetic compound

What Type of Medicine is Finasteride Teva?

Finasteride Teva is a synthetic prescription-only medicine that is classified as a steroid reductase inhibitor. The active pharmaceutical ingredient is Finasteride, an azasteroid compound. This specific formulation, marketed by Teva, provides the established Finasteride compound as a film-coated tablet, an oral solid dosage form intended for systemic absorption. The 5α-reductase inhibitor classification is clinically recognized for its precise biological function, supporting its designation for managing specific hormonal processes.

Composition and the Origin of Finasteride

The medicine’s composition centers on the single active substance, Finasteride (INN), which is established as an entirely synthetic compound. This distinguishes the medicine from non-synthetic or herbal preparations. Finasteride Teva tablets utilize excipients, such as lactose monohydrate, necessary for forming the stable, orally administered core and the protective outer coating. The formulation as a film-coated tablet is specifically designed to ensure consistent, measured dosing via the oral route.

General Therapeutic Purpose: Regulating Androgen Metabolism

The fundamental purpose of Finasteride Teva is to manage specific physiological states influenced by the potent androgen Dihydrotestosterone (DHT) through the regulation of the body's androgen metabolism. Finasteride inhibits the enzyme responsible for converting testosterone into the more active DHT. This mechanism, supported by long-standing pharmacological studies, consistently decreases the concentration of DHT in sensitive tissues, providing a focused hormonal regulatory effect. This characteristic action is typically used in the management of certain conditions in adult men where elevated DHT levels contribute to the pathogenesis.

Regulatory References

  1. NIH Finasteride Overview

What side effects are possible with Finasteride Teva?

Possible Side Effects and Safety Information

The safety profile of Finasteride Teva is organized by how often side effects were observed in clinical studies or reported during post-marketing surveillance, strictly following government regulatory standards.

Frequency-Classified Adverse Reactions

Classification Examples of Documented Side Effects
Common (1 to 10 in 100 people) Decreased libido, Erectile dysfunction, Ejaculation disorder.
Uncommon (1 to 10 in 1,000 people) Rash, Breast tenderness and/or enlargement (Gynecomastia).
Frequency Not Known Depression, Suicidal ideation, Anxiety, Persistence of sexual dysfunction after stopping treatment, Male breast cancer, Hypersensitivity reactions (e.g., angioedema), Testicular pain.

Serious and Clinically Significant Safety Concerns

Regulatory documents confirm the potential for serious psychiatric adverse reactions, including depression and suicidal ideation, which have been reported in post-marketing use. There have also been reports of male breast cancer and persistent sexual dysfunction that may continue after the drug is stopped.

Population-Specific Restrictions and Limitations

  • Pregnant Women: Finasteride is contraindicated for use in women who are or may become pregnant. Tablets must not be handled by pregnant women, especially if crushed or broken, due to the risk of absorption and potential harm to a male fetus.
  • PSA Testing: Finasteride lowers serum Prostate Specific Antigen (PSA) levels. This reduction must be accounted for by healthcare professionals when monitoring patients, as any rise in PSA levels should be investigated for prostate cancer.
  • Pediatric Use: The medication is not indicated for use in children.

Overdose and Emergency Response

Overdose and when to seek help — Official Regulatory Information for Finasteride Teva

The regulatory profile for Finasteride overdose is primarily defined by high-dose clinical data documented in government labeling. Single oral doses of the active ingredient up to 400 mg and multiple doses up to 80 mg per day for three months were administered in clinical trials without reports of adverse effects. Regulatory documents note the absence of documented clinically significant toxicity at these tested exposure levels, suggesting a high tolerance profile.

Required Emergency Actions

Action Mandated by Regulator Circumstance
Contact a regional poison control centre For any suspected drug overdose.
Contact emergency services (911) If the victim has collapsed, is having a seizure, has trouble breathing, or cannot be awakened.

The official labeling confirms that due to the lack of significant toxicity data, no specific treatment or antidote is recommended. Consequently, management is expected to be symptomatic and supportive, consistent with general care for drug ingestions. No specific cautions for overdose severity based on age, or in populations with hepatic or renal impairment, are described in the regulatory overdose sections. The most critical action is seeking immediate medical help for the onset of any life-threatening clinical signs as defined by official health guidance.

Therapeutic Uses of Finasteride Teva

Finasteride Teva is applied across domains where additional symptomatic support is needed, primarily helping to manage two distinct therapeutic areas in men: Benign Prostatic Hyperplasia (BPH) and Male Pattern Hair Loss.

This medicine is relevant for easing discomfort in contexts marked by increased physiological stress. It is commonly used when symptoms intensify and supportive relief is needed. The general patient-oriented benefit is that it supports patients during episodes of heightened discomfort and helps maintain a sense of stability when symptoms are more noticeable.

It is commonly used to help manage symptoms that create noticeable physiological strain and assists with maintaining functional stability.


Quick Facts: Therapeutic Support

  • BPH Symptoms: Used in situations involving symptomatic discomfort related to BPH, addressing groups of symptoms that interfere with daily functioning, such as frequent or difficult urination.
  • Hair Loss Symptoms: Applied across contexts where additional support for symptom management is needed in situations involving episodic or fluctuating manifestations of male pattern hair loss.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

The eligibility profile for Finasteride Teva is strictly defined by regulatory documents, limiting its use almost exclusively to adult men aged 18 and older.

Contraindicated Populations

Use is prohibited for several groups based on absolute regulatory rules:

  • Women (in general), particularly those who are or may become pregnant, due to the severe risk of external genital abnormalities in a male fetus.
  • Individuals with a known hypersensitivity to finasteride or any of its excipients, including those with rare hereditary problems such as lactose intolerance.

Age and Condition Limitations

The medicine is not indicated for use in children or adolescents under 18 years, as safety and efficacy have not been established in the pediatric population. For older adults, no dosage adjustment is necessary.

Eligibility is conditional on organ function. Caution is advised when administering the medicine to patients with impaired hepatic function or liver abnormalities due to its extensive liver metabolism. In contrast, no dosage adjustment is necessary for patients with renal impairment. Additionally, individuals with severely diminished urinary flow must be carefully monitored as a condition of eligibility, as stated in the regulatory labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official Interaction Profile

The official regulatory profile for Finasteride Teva is characterized by a lack of clinically significant drug interactions. According to authoritative government regulatory sources, no drug interactions of clinical importance have been identified for this medicine.

Studies have confirmed that Finasteride does not appear to affect the Cytochrome P450-linked drug metabolizing enzyme system, which is responsible for processing many other medicines. This conclusion is supported by co-administration studies where no clinically meaningful interactions were found with several tested compounds, including antipyrine, digoxin, propranolol, theophylline, and warfarin.

Restrictions and Considerations

There are no known interactions documented in the regulatory labels with general foods or drinks, and the medicine may be taken with or without food. Furthermore, the official labeling includes no formal restrictions or prohibitions on combining this medicine with other drugs due to interaction risk.

A key consideration in the interaction profile relates to how the body processes the medicine. Since Finasteride is extensively metabolized in the liver, regulatory documents advise that caution should be used when administering the medicine to patients with liver function abnormalities. Conversely, for patients with renal impairment, the official label states that no dosage adjustment is necessary.

Mechanism of Action

Finasteride acts by targeting and modulating a key component of the hormonal cascade. Its action profile is defined by enzyme inhibition, resulting in a quantifiable change in androgen balance.

Targeting the 5α-Reductase Enzyme

This molecule operates as a specific competitive inhibitor of the 5α-reductase enzyme, focusing primarily on the Type II isoform found in androgen-sensitive tissues. By binding to this enzyme, Finasteride prevents the metabolic conversion of the precursor hormone, Testosterone, into the potent androgen, Dihydrotestosterone (DHT).

Modulating the Androgen Metabolic Pathway

The consequence of this enzyme blockade is a significant and sustained reduction in systemic and tissue concentrations of DHT. This change in the Testosterone-to-DHT ratio modulates the androgenic signaling pathways that rely on the presence of DHT. The overall effect is a physiological adjustment that reduces the impact of high DHT activity on target cells.

Constraints and Time-Dependent Effects

Due to its mechanism, the physiological effect of the molecule is time-dependent, requiring a sustained reduction in DHT levels over weeks or months for the tissue response to fully manifest. In addition, the molecule exhibits lower affinity for the 5α-reductase Type I isoform, resulting in less pronounced inhibition in tissues where Type I predominates.

Dosage and Administration Information

How to Use Finasteride Teva: Official Administration Guidelines

Finasteride Teva is an oral medicine administered as a film-coated tablet and is used according to specific schedules defined by regulatory authorities.


Administration Scope

Instruction Detail
Route of administration Oral
Dosing schedule 5 mg once daily for Benign Prostatic Hyperplasia (BPH). 1 mg once daily for Male Pattern Hair Loss (Androgenetic Alopecia).
Timing in relation to meals May be taken with or without food.
Age-group administration rules Geriatric Patients: No dosage adjustment is required. Pediatric Patients: Not indicated for use in children.
Missed-dose rules If a dose is missed, patients should take the next dose as scheduled; a double dose must not be taken.

Resulting Procedural Structure

The medicine's use is structured by mandatory adherence to the once-daily frequency and the specific handling of the dosage form. The tablet must be swallowed whole and must not be crushed or broken. This restriction is tied to the physical properties of the film-coated tablet.

Connection to the overall use protocol:

Finasteride use requires a long-term, continuous administration pattern for both approved conditions. For BPH, continuous daily treatment for at least six months is necessary to assess the response, while use for male pattern hair loss requires three months or more before a benefit is typically observed. The administration is standardized, allowing intake at any time of day, independent of mealtimes.

Recent Clinical Evidence

Finasteride Teva: Recent Clinical Evidence

Finasteride is a 5-alpha reductase inhibitor, an enzyme involved in converting testosterone to dihydrotestosterone (DHT). Clinical research focuses on its two primary applications: the 5 mg dose for Benign Prostatic Hyperplasia (BPH) and the 1 mg dose for Male Pattern Baldness (Androgenetic Alopecia).


Efficacy for Benign Prostatic Hyperplasia (5 mg)

Long-term studies, including those lasting up to six years, have examined the effects of finasteride 5 mg daily in men with BPH. The evidence suggests that treatment is associated with a durable improvement in lower urinary tract symptoms, including increased maximum urinary flow rate. Clinical trials also report a reduction in prostate volume, with some studies documenting a mean decrease of approximately 24% over 24 months. Furthermore, continuous use has been associated with reducing the risk of BPH-related complications, such as the need for surgical intervention or acute urinary retention.


Efficacy for Male Pattern Baldness (1 mg)

In studies lasting up to five years, finasteride 1 mg daily was evaluated in men with androgenetic alopecia. Trials documented that treatment slowed the progression of hair loss and was associated with sustained improvements in hair count and investigator assessments of hair growth compared to placebo. The efficacy was generally maintained or improved throughout extended study periods. The effect on hair parameters is dependent on continued use, as hair parameters typically return to pre-treatment levels within 12 months after discontinuation.


Safety and Long-Term Follow-up

Finasteride has been studied in large-scale trials, including those with over 18,000 men and long-term follow-up of nearly two decades. Common adverse events observed in trials included sexual dysfunction (such as decreased libido and erectile dysfunction), typically occurring at a low incidence during the first year of use. Reports from the Prostate Cancer Prevention Trial (PCPT) with an 18-year median follow-up found no statistically significant difference in prostate cancer-specific death rates between finasteride and placebo groups.

Frequently Asked Questions (FAQ)

Common questions about Finasteride Teva (FAQ)

Q: Is Finasteride Teva the same medication as the one marketed under other brand names?

A: Finasteride is the active ingredient that is clinically proven for the approved uses. Different pharmaceutical manufacturers market their own specific formulations of this active ingredient under various generic and brand names. The active ingredient in these formulations is the same core compound, Finasteride.

Q: Is Finasteride Teva considered a generic version of a well-known drug?

A: Finasteride Teva is a specific pharmaceutical formulation of the generic drug, Finasteride. The active ingredient is chemically identical to the compound found in the original innovator brand products.

Q: What happens if I stop taking Finasteride Teva suddenly?

A: If the medicine is stopped, the body’s levels of dihydrotestosterone (DHT) generally return to pre-treatment levels within approximately two weeks. For individuals using the drug for male pattern hair loss, the observed benefit typically begins to reverse, and hair parameters return to pre-treatment levels within 12 months after discontinuation.

Q: Are the side effects of Finasteride Teva usually permanent?

A: Clinical trials reported that common sexual side effects often resolved after stopping the drug or in some men who continued treatment. However, official post-marketing reports include documented cases of certain adverse reactions, such as sexual dysfunction, depression, and other psychiatric symptoms, persisting after the medicine was discontinued.

Q: Does Finasteride Teva interact with common supplements like vitamins or herbal products?

A: Official regulatory documents have not identified any clinically significant interactions between Finasteride and the body’s main drug-metabolizing enzyme system (CYP450). While no drug interactions of clinical importance have been reported, it is important that any patient inform their healthcare professional about all supplements, vitamins, and herbal remedies being taken.

Q: Can Finasteride Teva cause weight changes?

A: Weight change, including either gain or loss, is not consistently listed as a common or uncommon side effect in primary regulatory trials. However, 'unusual weight gain or loss' has been noted in less common post-marketing reports for some Finasteride formulations.

Q: Does alcohol affect how Finasteride Teva works?

A: Official product information for Finasteride does not list a known clinically significant interaction with alcohol. Questions regarding alcohol consumption while using the medicine are best directed to a healthcare professional.

Q: Is Finasteride Teva effective for everyone who uses it?

A: Clinical trials for approved conditions show sustained improvement in a majority of men compared to placebo. The extent of efficacy can vary based on individual sensitivity and the severity of the condition being managed, as not 100% of participants achieved the same outcome.

Q: Will Finasteride Teva affect my ability to drive or operate machinery?

A: Based on the official pharmacodynamic properties and the reported adverse events, the medicine is generally not expected to affect the ability to drive or safely operate machinery. However, individuals should remain aware of possible side effects like dizziness that may rarely occur and could influence their performance.

Q: Does Finasteride Teva affect fertility or sperm count?

A: Post-marketing experience has included reports of decreased sperm count, reduced semen volume, and/or impaired sperm motility. Official reports noted that these effects typically normalized or improved after the medicine was stopped.

Q: Does Finasteride Teva affect cholesterol levels?

A: Official studies have examined the potential impact of Finasteride on plasma lipid profiles. These studies concluded that the medicine has no clinically meaningful effect on total cholesterol, LDL (low-density lipoproteins), HDL (high-density lipoproteins), or triglycerides.

Q: Is Finasteride Teva known to cause dizziness or lightheadedness?

A: Dizziness is a possible side effect that is documented in official adverse reaction and post-marketing surveillance reports for Finasteride. Any such experience is typically reported to a healthcare provider.

Q: What is the half-life of Finasteride Teva, or how long does it stay in the body?

A: The half-life of Finasteride, which is the time it takes for half of the dose to be eliminated from the body, averages approximately five to six hours in younger men. For men over 70, the half-life may be slightly extended to around eight hours.

Q: Is there a risk of withdrawal effects when discontinuing Finasteride Teva?

A: Regulatory documents do not use the specific term 'withdrawal effects' in their safety profiles. However, official concerns are documented regarding the reversal of the desired therapeutic effect (e.g., renewed hair loss) and the potential for sexual or psychiatric symptoms to persist after the medicine is stopped.

Q: What should I do if a child accidentally swallows Finasteride Teva?

A: If a child has accidentally swallowed the medication, the recommended protocol is to contact a poison control center or seek immediate emergency medical attention. The container is typically made available to provide information about the medication to health professionals.

Q: Does Finasteride Teva cause changes in hair growth in other parts of the body?

A: The medicine is a selective inhibitor, primarily targeting the Type II 5-alpha reductase enzyme which is concentrated in the scalp hair follicles. Official clinical trials did not report any significant effect on hair growth in other parts of the body.

Q: Can Finasteride Teva be used with pain relievers like ibuprofen or paracetamol?

A: Regulatory labels state that Finasteride does not significantly affect the main drug-metabolizing enzyme system. While official warnings against co-administration with pain relievers like ibuprofen or paracetamol are not listed, combination drug use is often reviewed by a healthcare professional.

How should Finasteride Teva be stored and disposed of?

Storage and Disposal Requirements for Finasteride Tablets

The medicine must be stored at Controlled Room Temperature, which is defined by regulatory standards as 20^circ to 25 C (68^circ to 77 F). The tablets must be protected from both excess heat and moisture and kept in a closed, original container to maintain product stability and shelf-life.

Finasteride tablets must be stored out of the reach and sight of children. An important handling requirement is that women who are or may be pregnant must not handle crushed or broken finasteride tablets. Disposal of any unused or expired product must be carried out in accordance with local pharmaceutical waste requirements.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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