Finasteride 1 Mg Film-Coated Tablets
Out of date information, search anotherSUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Finasteride 1 mg Film-coated Tablets
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
Each tablet contains 1 mg of finasteride.
Excipients:
Each tablet contains 112 mg of lactose monohydrate (see section 4.4).
For a full list of excipients, see section 6.1.
3 PHARMACEUTICAL FORM
Film-coated tablet.
Brown, round film-coated tablets, debossed “FNT1” on one side and plain on the other.
4 CLINICAL PARTICULARS
4.1 Therapeutic indications
Early stages of androgenetic alopecia in men. Finasteride stabilizes the process of androgenetic alopecia in men 18-41 years of age. Efficacy in bitemporal recession and end-stage hair loss has not been established.
4.2 Posology and method of administration
1 tablet (1 mg) daily with or without food.
There is no evidence that an increase in dosage will result in increased efficacy.
Efficacy and duration of treatment should continuously be assessed by the treating physician. Generally, three to six months of once daily treatment are required before evidence of stabilisation of hair loss can be expected. Continuous use is recommended to sustain benefit. If treatment is stopped, the beneficial effects begin to reverse by 6 months and return to baseline by 9 to 12 months.
No dosage adjustment is required in patients with renal insufficiency.
Children and adolescents
The safety and efficacy of finasteride in children and adolescents aged less than 18 years have not been established. No data are available.
4.3 Contraindications
Contra-indicated in women: see sections 4.6 and 5.1) Hypersensitivity to finasteride or to any of the excipients
4.4 Special warnings and special precautions for use
Finasteride should not be used in children. There are no data demonstrating efficacy or safety of finasteride in children under the age of 18.
In clinical studies with finasteride in men 18-41 years of age, the mean value of serum prostate-specific antigen (PSA) decreased from 0.7 ng/ml at baseline to 0.5 ng/ml at month 12. Doubling the PSA level in men taking finasteride should be considered before evaluating this test result.
Long-term data on fertility in humans are lacking, and specific studies in subfertile men have not been conducted. The male patients who were planning to father a child were initially excluded from clinical trials. Although animal studies did not show relevant negative effects on fertility, spontaneous reports of infertility and/or poor seminal quality were received post-marketing. In some of these reports, patients had other risk factors that might have contributed to infertility. Normalisation or improvement of seminal quality has been reported after discontinuation of finasteride.
The effect of hepatic insufficiency on the pharmacokinetics of finasteride has not been studied.
Breast cancer has been reported in men taking finasteride 1 mg during the postmarketing period. Physicians should instruct their patients to promptly report any changes in their breast tissue such as lumps, pain, gynaecomastia or nipple discharge.
This medicinal product contains lactose monohydrate. Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicinal product.
4.5 Interaction with other medicinal products and other forms of interaction
Finasteride is metabolised via, but does not affect, the cytochrome P450 3A4 system. Although the risk for finasteride to affect the pharmacokinetics of other drugs is estimated to be small, it is probable that inhibitors and inducers of cytochrome P450 3A4 will affect the plasma concentration of finasteride. However, based on established safety margins, any increase due to concomitant use of such inhibitors is unlikely to be of clinical significance.
4.6 Pregnancy and lactation
Pregnancy
Finasteride is contraindicated for use in women due to the risk in pregnancy. Because of the ability of finasteride to inhibit conversion of testosterone to dihydrotestosterone (DHT) finasteride may cause abnormalities of the external genitalia of a male fetus when administered to a pregnant woman (see 6.6 Instructions for use/handling).
Lactation
It is not known whether finasteride is excreted in human milk.
4.7 Effects on ability to drive and use machines
No studies on the ability to drive or use machines have been performed.
4.8 Undesirable effects
The adverse reactions during clinical trials and/or post-marketing use are listed in the table below.
Frequency of adverse reactions is determined as follows: very common (>1/10), common (>1/100, <1/10), uncommon (>1/1,000, <1/100), rare (>1/10,000, <1/1,000), very rare (<1/10,000), not known (cannot be estimated from the available data). The frequency of adverse reactions reported during post-marketing use cannot be determined as they are derived from spontaneous reports.
|
Immune system disorders |
Not known |
Hypersensitivity reactions, including rash, pruritus, urticaria and swelling of the lips and face |
|
Cardiac disorders |
Not known |
Palpitation |
|
Psychiatric disorders |
Uncommon* Uncommon |
Decreased libido Depressed moodf |
|
Hepatobiliary disorders |
Not known |
Increased hepatic enzymes |
|
Reproductive system and breast disorders |
Uncommon* |
Erectile dysfunction, ejaculation disorder (including decreased volume of ejaculate) |
|
Not known |
Breast tenderness and enlargement, testicular pain, |
infertility* *
___** see section 4.4_
* Incidences presented as difference from placebo in clinical studies at Month 12._
f This adverse reaction was identified through post-marketing surveillance but the incidence in randomized controlled Phase III clinical trials (Protocols 087, 089 and 092) was not different between finasteride and placebo._
Drug-related undesirable effects were more common in the finasteride-treated men than the placebo-treated men, with frequencies during the first 12 months of 3.8% vs 2.1%, respectively. The incidence of these effects decreased to 0.6% in finasteride-treated men over the following four years. Approximately 1% of men in each treatment group discontinued due to drug-related sexual adverse experiences in the first 12 months, and the incidence declined thereafter.
In addition, the following have been reported in post-marketing use: persistence of erectile dysfunction after discontinuation of treatment with finasteride, male breast cancer (see section 4.4).
4.9 Overdose
In clinical studies, single doses of finasteride up to 400 mg and multiple doses of finasteride up to 80 mg/day for three months (n=71) did not result in dose-related undesirable effects.
No specific treatment of overdose with finasteride is recommended.
5 PHARMACOLOGICAL PROPERTIES
5.1 Pharmacodynamic properties
Pharmacotherapeutic group: other dermatological preparations, other dermatologicals ATC code: D11AX10
Finasteride is a 4-azasteroid which inhibits human type II 5a-reductase (present within the hair follicles) with greater than 100-fold selectivity over human type I 5 a-reductase, and blocks the peripheral conversion of testosterone to the androgen dihydrotestosterone (DHT).
In men with male pattern hair loss, the balding scalp contains miniaturised hair follicles and increased amounts of DHT. Finasteride inhibits a process responsible for miniaturisation of the scalp hair follicles, which can lead to reversal of the balding process.
Studies in men
The efficacy of finasteride was demonstrated in 3 studies in 1879 men aged 18 to 41 years with mild to moderate, but not complete, vertex hair loss and frontal/mid-area hair loss. In these studies, hair growth was assessed using 4 separate measures including hair count, ratings of photographs of the head by an expert panel of dermatologists, investigator assessment, and patient self-assessment.
In the two studies in men with vertex hair loss, treatment with finasteride was continued for 5 years, during which time patients improved compared to both baseline and placebo beginning at 3 to 6 months. While hair improvement measures compared to baseline in men treated with finasteride were generally greatest at 2 years and gradually declined thereafter (e.g. hair count in a representative 5.1 cm2 area was increased 88 hairs from baseline at 2 years and 38 hairs from baseline at 5 years), hair loss in the placebo group progressively worsened compared to baseline (decrease of 50 hairs at 2 years and 239 hairs at 5 years). Thus, although improvement compared to baseline in men treated with finasteride did not increase further after 2 years, the difference between treatment groups continued to increase throughout the 5 years of the studies. Treatment with finasteride for 5 years resulted in stabilisation of hair loss in 90% of men based on photographic assessment and in 93% based on investigator assessment. In addition, increased hair growth was observed in 65% of men treated with finasteride based on hair counts, in 48% based on photographic assessment, and in 77% based on investigator assessment. In contrast, in the placebo group, gradual hair loss over time was observed in 100% of men based on hair counts, in 75% based on photographic assessment, and in 38% based on investigator assessment. In addition, patient self-assessment demonstrated significant increases in hair density, decreases in hair loss, and improvement in appearance of hair after treatment over 5 years with finasteride (see table below).
|
Percent ofpatients improved as assessed by each of the 4 measures | ||||||
|
Year 1T |
Year 2n |
Year 5n | ||||
|
Finasteride |
Placebo |
Finasteride |
Placebo |
Finasteride |
Placebo | |
|
Hair count |
(n=679) 86 |
(n=672) 42 |
(n=433) 83 |
(n=47) 28 |
(n=219) 65 |
(n=15) 0 |
|
Global photographic assessment |
(n=720) 48 |
(n=709) 7 |
(n=508) 66 |
(n=55) 7 |
(n=279) 48 |
(n=16) 6 |
|
Investigator assessment |
(n=748) 65 |
(n=747) 37 |
(n=535) 80 |
(n=60) 47 |
(n=271) 77 |
(n=13) 15 |
|
Patient selfassessment: satisfaction with appearance of hair overall |
(n=750) 39 |
(n=747) 22 |
(n=535) 51 |
(n=60) 25 |
(n=284) 63 |
(n=15) 20 |
|
T: Randomisation 1:1 finasteride to placebo | ||||||
|
n: Randomisation 9:1 finasteride to placebo | ||||||
In a 12-month study in men with frontal/mid-area hair loss, hair counts were obtained in a representative 1 cm2 area (approximately 1/5 the size of the area sampled in the vertex studies). Hair counts, adjusted to a 5.1 cm2 area, increased by 49 hairs (5%) compared to baseline and by 59 hairs (6%) compared to placebo. This study also demonstrated significant improvements in patient self-assessment, investigator assessment, and ratings of photographs of the head by an expert panel of dermatologists.
Two studies of 12 and 24 weeks' duration showed that a dose 5-fold the recommended dose (finasteride 5 mg daily) produced a median decrease in ejaculate volume of approximately 0.5 ml (-25%) compared with placebo. This decrease was reversible after discontinuation of treatment. In a study of 48 weeks' duration, finasteride 1 mg daily produced a median decrease in ejaculate volume of 0.3 ml (11%) compared with a 0.2 ml (-8%) decrease for placebo. No effect was observed on sperm count, motility or morphology. Longer-term data are not available. It has not been feasible to undertake clinical studies which directly elucidate possible negative effects on fertility. However, such effects are judged as very unlikely (see also section 5.3).
Studies in women
Lack of efficacy was demonstrated in post-menopausal women with androgenetic alopecia who were treated with finasteride 1 mg for 12 months.
5.2 Pharmacokinetic properties
Bioavailability
The oral bioavailability of finasteride is approximately 80% and is not affected by food. Maximum finasteride plasma concentrations are reached approximately 2 hours after dosing and the absorption is complete after 6 to 8 hours.
Distribution
Protein binding is approximately 93%. The volume of distribution is approximately 76 litres (44-96 l).
At steady state following dosing with 1 mg/day, maximum finasteride plasma concentration averaged 9.2 ng/ml and was reached 1 to 2 hours postdose; AUC (0-24 hr) was 53 ng x hr/ml.
Finasteride has been recovered in the cerebrospinal fluid (CSF), but the drug does not appear to concentrate preferentially to the CSF. A very small amount of finasteride has also been detected in the seminal fluid of subjects receiving the drug. Studies in rhesus monkeys showed that this amount is not considered to constitute a risk to the developing male fetus (see sections 4.6 and 5.3).
Biotransformation
Finasteride is metabolised primarily via but does not affect the cytochrome P450 3A4 system. Following an oral dose of 14C-fmasteride in man, two metabolites of the drug were identified that possess only a small fraction of the 5a-reductase inhibitory activity of finasteride.
Elimination
Following an oral dose of 14C-finasteride in man, approximately 39% (32-46%) of the dose was excreted in the urine in the form of metabolites. Virtually no unchanged drug was excreted in the urine and 57% (51-64%) of total dose was excreted in the faeces.
Plasma clearance is approximately 165 ml/min (70-279 ml/min).
The elimination rate of finasteride decreases somewhat with age. Mean terminal plasma half-life is approximately 5-6 hours (3-14 hours) (in men more than 70 years of age 8 hours (6-15 hours)). These findings are of no clinical significance and hence, a reduction in dosage in the elderly is not warranted.
Hepatic insufficiency
The effect of hepatic insufficiency on the pharmacokinetics of finasteride has not been studied.
Renal insufficiency
In patients with chronic renal impairment, with creatinine clearances ranging from 955 ml/min, area under the curve, maximum plasma concentrations, half-life, and protein binding of unchanged finasteride after a single dose of 14C-finasteride were similar to values obtained in health volunteers.
5.3 Preclinical safety data
Mutagenicity/carcinogenicity
Studies on genotoxicity and carcinogenicity have not revealed any hazards for humans.
Reproduction-disturbing effect including fertility
The effects on embryonic and fetal development have been studied in rats, rabbits and rhesus monkeys. In rats treated with 5-5,000 times the clinical dose, a dose-related occurrence of hypospadias has been observed in male fetuses. In rhesus monkeys, treatment with oral doses of 2 mg/kg/day has also resulted in external genital abnormalities.
Intravenous doses of up to 800 ng/day in rhesus monkeys have not shown any effects on male fetuses. This represents at least 750 times the highest estimated exposure of pregnant women to finasteride from semen of men taking 1 mg/day (see section 5.2).
In the rabbit study, the fetuses were not exposed to finasteride during the period critical for genital development.
Neither ejaculation volume, sperm count nor fertility were affected in the rabbit after treatment with 80 mg/kg/day, a dose that in other studies is shown to have pronounced weight-lowering effects on accessory sexual glands. In rats treated for 6 and 12 weeks with 80 mg/kg/day (approximately 500 times the clinical exposure) no effect on fertility was observed. After 24-30 weeks' treatment some reduced fertility and pronounced weight reduction of prostate and seminal vesicle were seen. All changes were reversible within a 6-week period. The reduced fertility has been shown to be due to impaired seminal plug formation, an effect that has no relevance to man. The development of the newborns and their reproduction capacity at the age of sexual maturation were without remark. After insemination of female rats with epididymis sperms from rats treated for 36 weeks with 80 mg/kg/day no effect was seen on a number of fertility parameters.
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
Core
Lactose monohydrate (200 mesh)
Starch, pregelatinised (maize)
Sodium laurilsulfate
Sodium starch glycolate (Type A)
Povidone (K30)
Cellulose, microcrystalline Magnesium stearate
Coating
Hypromellose 6 cP (E464)
Titanium dioxide (E171)
Macrogol 6000 Macrogol 400 Iron oxide red (E172)
Iron oxide yellow (E172)
6.2 Incompatibilities
Not applicable
6.3 Shelf life
3 years
6.4 Special precautions for storage
This product does not require any special storage precautions.
6.5 Nature and contents of container
Transparent PVC/PVdC-aluminium blisters.
Blister packs of 7, 28, 30, 50 (Hospital Packs), 84, 98 and 100 Film-coated Tablets Not all pack sizes may be marketed.
6.6 Special precautions for disposal
Crushed or broken tablets of finasteride should not be handled by women when they are or may potentially be pregnant because of the possibility of absorption of finasteride and subsequent potential risk to a male fetus (see section 4.6). Finasteride tablets are coated and will prevent contact with the active ingredient during normal handling, provided that the tablets are not broken or crushed.
7 MARKETING AUTHORISATION HOLDER
TEVA UK Ltd
Brampton Road, Hampden Park Eastbourne, BN22 9AG England
8 MARKETING AUTHORISATION NUMBER(S)
PL 00289/0826
9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION
10/08/2009
10 DATE OF REVISION OF THE TEXT
11/01/2012