Finasteride

Do not take it if

Quoted from the official label, section “Contraindications”.

How to take it

These directions are for this exact strength and form. Another one is different.

• Finasteride tablets may be administered with or without meals.
• Finasteride may be administered with or without meals (2).
• Monotherapy: One tablet (5 mg) taken once a day (2.1).
• Combination with Doxazosin:
• One tablet (5 mg) taken once a day in combination with the alpha-blocker doxazosin (2.2).
• 2.1 Monotherapy The recommended dose of finasteride tablets is one tablet (5 mg) taken once a day [see Clinical Studies (14.1) ].
• 2.2 Combination with Alpha-Blocker The recommended dose of finasteride is one tablet (5 mg) taken once a day in combination with the alpha-blocker doxazosin [see Clinical Studies (14.2) ].

Quoted from the official label, section “Dosage & Administration”.

Other warnings

Quoted from the official label, section “Warnings”.

Pregnancy and breastfeeding

Quoted from the official label, section “OTC — Pregnancy or Breast Feeding”.

Other medicines

Quoted from the official label, section “Drug Interactions”.

If you take too much

In an emergency, call your local emergency number or a poison control centre.

Quoted from the official label, section “Overdosage”.

Use in children

Finasteride tablets are not indicated for use in pediatric patients. Safety and effectiveness in pediatric patients have not been established.

Quoted from the official label, section “Pediatric Use”.

Use in older people

• Of the total number of subjects included in the long-term efficacy and safety study, 1480 and 105 subjects were 65 and over and 75 and over, respectively.
• No overall differences in safety or effectiveness were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients.
• No dosage adjustment is necessary in the elderly [ see Clinical Pharmacology ( 12.3 ) and Clinical Studies ( 14 ) ].

Quoted from the official label, section “Geriatric Use”.

Side effects

• The drug-related adverse reactions, reported in ≥1% in patients treated with finasteride and greater than in patients treated with placebo over a 4 year study are:
• impotence, decreased libido, decreased volume of ejaculate, breast enlargement, breast tenderness and rash (6.1).
• To report SUSPECTED ADVERSE REACTIONS, contact Dr.
• Reddy’s Laboratories Inc. at 1-888-375-3784 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
• 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. 4-Year Placebo-Controlled Study (Long-Term Efficacy and Safety Study) In a long-term efficacy and safety study, 1524 patients treated with finasteride and 1516 patients treated with placebo were evaluated for safety over a period of 4 years.
• The most frequently reported adverse reactions were related to sexual function. 3.7% (57 patients) treated with finasteride and 2.1% (32 patients) treated with placebo discontinued therapy as a result of adverse reactions related to sexual function, which are the most frequently reported adverse reactions.
• Table 1 presents the only clinical adverse reactions considered possibly, probably or definitely drug related by the investigator, for which the incidence on finasteride was ≥1% and greater than placebo over the 4 years of the study.
• In years 2 to 4 of the study, there was no significant difference between treatment groups in the incidences of impotence, decreased libido and ejaculation disorder.
• Table 1:
• Drug-Related Adverse Experiences Year 1 (%) Years 2, 3 and 4* (%) Finasteride Placebo Finasteride Placebo Impotence 8.1 3.7 5.1
• 5.1 Decreased Libido 6.4 3.4 2.6
• 2.6 Decreased Volume of Ejaculate 3.7 0.8 1.5
• 0.5 Ejaculation Disorder 0.8 0.1 0.2
• 0.1 Breast Enlargement 0.5 0.1 1.8
• 1.1 Breast Tenderness 0.4 0.1 0.7
• 0.3 Rash 0.5 0.2 0.5 0.1 *Combined Years 2 to 4 N = 1524 and 1516, finasteride vs placebo, respectively Phase III Studies and 5-Year Open Extensions The adverse experience profile in the 1-year, placebo-controlled, Phase III studies, the 5 year open extensions, and PLESS were similar.
• The adverse experience profile in the 1-year, placebo-controlled, Phase III studies, the 5-year open extensions, and thelong-term efficacy and safety study were similar.
• Medical Therapy of Prostatic Symptoms (MTOPS) Study In the MTOPS study, 3047 men with symptomatic BPH were randomized to receive finasteride 5 mg/day (n=768), doxazosin 4 or 8 mg/day (n=756), the combination of finasteride 5 mg/day and doxazosin 4 or 8 mg/day (n=786), or placebo (n=737) for 4 to 6 years. [ See Clinical Studies (14.2) . ] The incidence rates of drug-related adverse experiences reported by ≥2% of patients in any treatment group in the MTOPS Study are listed in Table 2.
• The individual adverse effects which occurred more frequently in the combination group compared to either drug alone were:
• asthenia, postural hypotension, peripheral edema, dizziness, decreased libido, rhinitis, abnormal ejaculation, impotence and abnormal sexual function (see Table 2).
• Of these, the incidence of abnormal ejaculation in patients receiving combination therapy was comparable to the sum of the incidences of this adverse experience reported for the two monotherapies.
• Combination therapy with finasteride and doxazosin was associated with no new clinical adverse experience.
• Four patients in MTOPS reported the adverse experience breast cancer.
• Three of these patients were on finasteride only and one was on combination therapy. [See Long-Term Data.] The MTOPS Study was not specifically designed to make statistical comparisons between groups for reported adverse experiences.
• In addition, direct comparisons of safety data between the MTOPS study and previous studies of the single agents may not be appropriate based upon differences in patient population, dosage or dose regimen, and other procedural and study design elements.
• Table 2 Incidence ≥2% in one or More Treatment Groups Drug-Related Clinical Adverse Experiences in MTOPS Adverse Experience Placebo Doxazosin 4 mg or 8 mg * Finasteride Combination (N=737) (%) (N=756) (%) (N=768) (%) (N=786) (%) Body as a whole Asthenia Headache 7.1 2.3 15.7 4.1 5.3 2 16.8
• 2.3 Cardiovascular Hypotension Postural Hypotension 0.7 8 3.4 16.7 1.2 9.1 1.5
• 17.8 Metabolic and Nutritional Peripheral Edema 0.9 2.6 1.3
• 3.3 Nervous Dizziness Libido Decreased Somnolence 8.1 5.7 1.5 17.7 7 3.7 7.4 10 1.7 23.2 11.6
• 3.1 Respiratory Dyspnea Rhinitis 0.7 0.5 2.1 1.3 0.7 1 1.9
• 2.4 Urogenital Abnormal Ejaculation Gynecomastia Impotence Sexual Function Abnormal 2.3 0.7 12.2 0.9 4.5 1.1 14.4 2 7.2 2.2 18.5 2.5 14.1 1.5 22.6 3.1 *Doxazosin dose was achieved by weekly titration (1 to 2 to 4 to 8 mg).
• The final tolerated dose (4 mg or 8 mg) was administered at end-Week 4.
• Only those patients tolerating at least 4 mg were kept on doxazosin.
• The majority of patients received the 8-mg dose over the duration of the study.
• Long-Term Data High-Grade Prostate Cancer The PCPT trial was a 7-year randomized, double-blind, placebo-controlled trial that enrolled 18,882 men ≥55 years of age with a normal digital rectal examination and a PSA ≤ 3 ng/mL.
• Men received either finasteride 5 mg or placebo daily.
• Patients were evaluated annually with PSA and digital rectal exams.
• Biopsies were performed for elevated PSA, an abnormal digital rectal exam, or the end of study.
• The incidence of Gleason score 8 to10 prostate cancer was higher in men treated with finasteride (1.8%) than in those treated with placebo (1.1%) [ see Indications and Usage ( 1.3) and Warnings and Precautions ( 5.2) ] .
• In a 4-year placebo-controlled clinical trial with another 5α-reductase inhibitor (dutasteride, AVODART), similar results for Gleason score 8 to 10 prostate cancer were observed (1% dutasteride vs 0.5% placebo).
• No clinical benefit has been demonstrated in patients with prostate cancer treated with finasteride.
• Breast Cancer During the 4 to 6-year placebo- and comparator-controlled MTOPS study that enrolled 3047 men, there were 4 cases of breast cancer in men treated with finasteride but no cases in men not treated with finasteride.
• During the 4-year, placebo-controlled long-term efficacy and safety study that enrolled 3040 men, there were 2 cases of breast cancer in placebo-treated men but no cases in men treated with finasteride.
• During the 7-year placebo-controlled Prostate Cancer Prevention Trial (PCPT) that enrolled 18,882 men, there was 1 case of breast cancer in men treated with finasteride, and 1 case of breast cancer in men treated with placebo.
• The relationship between long-term use of finasteride and male breast neoplasia is currently unknown.
• Sexual Function There is no evidence of increased sexual adverse experiences with increased duration of treatment with finasteride.
• New reports of drug-related sexual adverse experiences decreased with duration of therapy.
• 6.2 Postmarketing Experience The following additional adverse events have been reported in post-marketing experience with finasteride.
• Because these events are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure:
• hypersensitivity reactions, such as pruritus, urticaria, and angioedema (including swelling of the lips tongue, throat, and face) - testicular pain - hematospermia - sexual dysfunction that continued after discontinuation of treatment, including erectile dysfunction, decreased libido and ejaculation disorders (e.g., reduced ejaculate volume).
• These events were reported rarely in men taking finasteride for the treatment of BPH.
• Most men were older and were taking concomitant medications and/or had co-morbid conditions.
• The independent role of finasteride in these events is unknown. - male infertility and/or poor seminal quality were reported rarely in men taking finasteride for the treatment of BPH.
• Normalization or improvement of poor seminal quality has been reported after discontinuation of finasteride The independent role of finasteride in these events is unknown. - depression - male breast cancer.
• The following additional adverse event related to sexual dysfunction that continued after discontinuation of treatment has been reported in postmarketing experience with finasteride at lower doses used to treat male pattern baldness.
• Because the event is reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate its frequency or establish a causal relationship to drug exposure:
• orgasm disorders

Quoted from the official label, section “Adverse Reactions”.

What to discuss with your doctor

• Advise the patient to read the FDA-approved patient labeling (Patient Information)
• 17.1 Increased Risk of High-Grade Prostate Cancer Patients should be informed that there was an increase in high-grade prostate cancer in men treated with 5α-reductase inhibitors indicated for BPH treatment, including finasteride, compared to those treated with placebo in studies looking at the use of these drugs to prevent prostate cancer [ see Indications and Usage (1.3) , Warnings and Precautions (5.2) , and Adverse Reactions (6.1) ].
• 17.2 Exposure of Females – Risk to Male Fetus Physicians should inform patients that females who are pregnant or may potentially be pregnant should not handle crushed or broken finasteride tablets because of the possibility of absorption of finasteride and the subsequent potential risk to the male fetus.
• Finasteride tablets are coated and will prevent contact with the active ingredient during normal handling, provided that the tablets have not been broken or crushed.
• If a female who is pregnant or may potentially be pregnant comes in contact with crushed or broken finasteride tablets, the contact area should be washed immediately with soap and water [see Contraindications (4) , Warnings and Precautions ( 5.3 ), Use in Specific Populations ( 8.1 ) and How Supplied/Storage and Handling ( 16 )].
• 17.3 Additional Instructions Physicians should inform patients that the volume of ejaculate may be decreased in some patients during treatment with finasteride.
• This decrease does not appear to interfere with normal sexual function.
• However, impotence and decreased libido may occur in patients treated with finasteride [see Adverse Reactions (6.1) ].
• Physicians should instruct their patients to promptly report any changes in their breasts such as lumps, pain or nipple discharge.
• Breast changes including breast enlargement, tenderness and neoplasm have been reported [see Adverse Reactions (6.1) ].
• Physicians should instruct their patients to read the patient package insert before starting therapy with finasteride and to reread it each time the prescription is renewed so that they are aware of current information for patients regarding finasteride.
• Rx Only Distributor: Dr.
• Reddy’s Laboratories Inc., Princeton, NJ 08540 Made in India Revised: 07/2023

Quoted from the official label, section “Patient Counseling Information”.

Strengths and forms

FORMS AND STRENGTHS 5 mg light green, oval, biconvex film coated tablets embossed with “R” on one side and “172” on the other side. 5 mg film-coated tablets (3).

Quoted from the official label, section “Dosage Forms & Strengths”.

What it looks like and how it is packed

• Finasteride tablets USP, 5 mg are light green, oval, biconvex film coated tablets embossed with “R” on one side and “172” on the other side and are supplied in blistercards of 30 and 15.
• Blistercards of 30 NDC 0615-8562-39 Blistercards of 15 NDC 0615-8562-05 Storage and Handling
• Store at 20°C to 25°C (68°F to 77°F) [see USP Controlled Room Temperature].
• Protect from light and keep container tightly closed.
• Females should not handle crushed or broken finasteride tablets when they are pregnant or may potentially be pregnant because of the possibility of absorption of finasteride and the subsequent potential risk to a male fetus [see Warnings and Precautions ( 5.3 ) and Use in Specific Populations ( 8.1 ) ].

Quoted from the official label, section “How Supplied”.

What is in it

• Finasteride, a synthetic 4-azasteroid compound, is a specific inhibitor of steroid Type II 5α-reductase, an intracellular enzyme that converts the androgen testosterone into 5α-dihydrotestosterone (DHT).
• Finasteride is 4-azaandrost-1-ene-17-carboxamide, N-(1,1-dimethylethyl)-3-oxo-,(5α,17β)-.
• The molucular formula of finasteride is C 23 H 36 N 2 O 2 and its molecular weight is 372.55.
• Its structural formula is:
• Finasteride USP is a white crystalline powder with a melting point near 250°C.
• It is freely soluble in chloroform and in lower alcohol solvents, but is practically insoluble in water.
• Finasteride tablets, USP for oral administration are film-coated tablets that contain 5 mg of finasteride and the following inactive ingredients:
• docusate sodium, FD& Blue # 2/Indigo Carmine Lake, hypromellose 6cp, lactose monohydrate, magnesium stearate, microcrystalline cellulose, polyethylene glycol 400, pregelatinized starch, sodium starch glycolate, titanium dioxide, and yellow iron oxide. structure

Quoted from the official label, section “Description”.

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Details

Source: NDC Directory · 2026-09-13 · not reviewed by a clinician

Source: US Food and Drug Administration, NDC Directory. Reuse terms: US government work (FDA).

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