Bicalutamide 150 Mg Film-Coated Tablets
SUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Bicalutamide 150 mg film-coated tablets
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
Each film-coated tablet contains 150 mg of bicalutamide as active ingredient. Excipient with known effect: Also contains 188.0 mg of lactose monohydrate For the full list of excipients, see section 6.1.
3 PHARMACEUTICAL FORM
Film-coated tablet
White, round, biconvex, scored, film-coated tablets
4 CLINICAL PARTICULARS
4.1 Therapeutic indications
Bicalutamide film-coated tablets 150 mg is indicated either alone or as adjuvant to radical prostatectomy or radiotherapy in patients with locally advanced prostate cancer at high risk for disease progression (see section 5.1).
4.2 Posology and method of administration
Posology
Adult males including the elderly: The dosage is one 150 mg tablet to be taken orally once a day.
Bicalutamide film-coated tablets 150 mg should be taken continuously for at least 2 years or until disease progression.
Pediatric Population
Bicalutamide film-coated tablets 150 mg is contraindicated in children and adolescents.
Patients with renal impairment
No dosage adjustment is necessary for patients with renal impairment. There is no experience with the use of bicalutamide in patients with severe renal impairment (creatinine clearance <30 ml/min), (See Section 4.4).
Patients with hepatic impairment
No dosage adjustment is necessary for patients with mild hepatic impairment. Increased accumulation may occur in patients with moderate to severe hepatic impairment (see section 4.4).
Method of administration
For oral administration.
The tablets should be swallowed whole with a glass of water.
4.3 Contraindications
Hypersensitivity to the active substance(s) or to any of the excipients listed in section 6.1
Bicalutamide film-coated tablets 150 mg is contraindicated in females and children and adolescents (see section 4.6).
Co-administration of terfenadine, astemizole or cisapride with bicalutamide is contraindicated (see section 4.5).
4.4 Special warnings and precautions for use
Initiation of treatment should be under the direct supervision of a specialist.
Bicalutamide is extensively metabolised in the liver. Data suggest that its elimination may be slower in subjects with severe hepatic impairment and this could lead to increased accumulation of bicalutamide. Therefore, bicalutamide 150 mg should be used with caution in patients with moderate to severe hepatic impairment.
Periodic liver function testing should be considered due to the possibility of hepatic changes. The majority of changes are expected to occur within the first 6 months of bicalutamide therapy.
Severe hepatic changes and hepatic failure have been observed rarely with bicalutamide 150 mg, and fatal outcomes have been reported (see section 4.8). bicalutamide 150 mg therapy should be discontinued if changes are severe.
For patients who have an objective progression of disease together with elevated PSA, cessation of bicalutamide therapy should be considered.
Bicalutamide has been shown to inhibit cytochrome P450 (CYP 3A4), as such, caution should be exercised when co-administered with drugs metabolised predominantly by CYP 3A4 (see sections 4.3 and 4.5).
In rare cases, photosensitivity reactions have been reported for patients taking bicalutamide 150 mg. Patients should be advised to avoid direct exposure to excessive sunlight or UV-light while on bicalutamide 150 mg and the use of sunscreens may be considered. In cases where the photosensitivity reaction is more persistent and/or severe, an appropriate symptomatic treatment should be initiated.
As there is no experience with the use of bicalutamide in patients with severe renal impairment (creatinine clearance < 30ml/min), bicalutamide should only be used with caution in these patients.
Periodical monitoring of cardiac function is advisable in patients with heart disease.
Androgen deprivation therapy may prolong the QT interval.
In patients with a history of or risk factors for QT prolongation and in patients receiving concomitant medicinal products that might prolong the QT interval (see section 4.5) physicians should assess the benefit risk ratio including the potential for Torsade de pointes prior to initiating bicalutamide.
Important information regarding the ingredients of this medicine
This medicine contains lactose. Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicine.
4.5 Interaction with other medicinal products and other forms of interaction
In vitro studies have shown that R-bicalutamide is an inhibitor of CYP 3A4, with lesser inhibitory effects on CYP 2C9, 2C19 and 2D6 activity. Although clinical studies using antipyrine as a marker of cytochrome P450 (CYP) activity showed no evidence of a drug interaction potential with bicalutamide, mean midazolam exposure (AUC) was increased by up to 80%, after co-administration of bicalutamide for 28 days. For drugs with a narrow therapeutic index such an increase could be of relevance. As such, concomitant use of terfenadine, astemizole and cisapride is contraindicated (see section 4.3) and caution should be exercised with the coadministration of bicalutamide with compounds such as ciclosporin and calcium channel blockers. Dosage reduction may be required for these drugs particularly if there is evidence of enhanced or adverse drug effect. For ciclosporin, it is recommended that plasma concentrations and clinical condition are closely monitored following initiation or cessation of bicalutamide therapy.
Caution should be exercised when prescribing bicalutamide with other drugs which may inhibit drug oxidation e.g. cimetidine and ketoconazole. In theory, this could result in increased plasma concentrations of bicalutamide which theoretically could lead to an increase in side effects.
In vitro studies have shown that bicalutamide can displace the coumarin anticoagulant, warfarin, from its protein binding sites. It is therefore recommended that if bicalutamide 150 mg is started in patients who are already receiving coumarin anticoagulants, prothrombin time should be closely monitored.
Since androgen deprivation treatment may prolong the QT interval, the concomitant use of bicalutamide with medicinal products known to prolong the QT interval or medicinal products able to induce Torsade de pointes such as class IA (e.g. quinidine, disopyramide) or class III (e.g. amiodarone, sotalol, dofetilide, ibutilide) antiarrhythmic medicinal products, methadone, moxifloxacin, antipsychotics, etc. should be carefully evaluated (see section 4.4).
4.6 Fertility, pregnancy and lactation
Bicalutamide is contraindicated in females and must not be given to pregnant women or nursing mothers.
Fertility:
Reversible impairment of male fertility has been observed in animal studies (see section 5.3). A period of subfertility or infertility should be assumed in man.
4.7 Effects on ability to drive and use machines
Bicalutamide is unlikely to impair the ability of patients to drive or operate machinery. However, it should be noted that occasionally somnolence may occur. Any affected patients should exercise caution.
4.8 Undesirable effects
In this section, undesirable effects are defined as follows: Very common (>1/10); common (>1/100 to <1/10); uncommon (>1/1,000 to <1/100); rare (>1/10,000 to <1/1,000); very rare (<1/10,000); not known (cannot be estimated from the available data).
Table 1 Frequency of Adverse Reactions
|
System Organ Class |
Frequency |
Event |
|
Blood and the lymphatic system disorders |
Common |
Anaemia |
|
Immune system disorders |
Uncommon |
Hypersensitivity, angioedema and urticaria |
|
Metabolism and nutrition disorders |
Common |
Decreased appetite |
|
Psychiatric disorders |
Common |
Decreased libido |
|
Depression | ||
|
Nervous system disorders |
Common |
Dizziness Somnolence |
|
Cardiac disorders |
Not known |
QT prolongation (see sections 4.4 and 4.5) |
|
Vascular disorders |
Common |
Hot flush |
|
Respiratory, thoracic and mediastinal disorders |
Uncommon |
Interstitial lung disease6 (fatal outcomes have been reported). |
|
Gastrointestinal disorders |
Common |
Abdominal pain Constipation Dyspepsia Flatulence Nausea |
|
Hepato-biliary disorders |
Common |
Hepatotoxicity, jaundice, hypertransaminasaemiaa |
|
Rare |
Hepatic failured (fatal outcomes have been reported). | |
|
Skin and subcutaneous tissue disorders |
Very common |
Rash |
|
Common |
Alopecia Hirsuitism/hair re-growth Dry skinc Pruritis | |
|
Rare |
Photosensitivity reaction | |
|
Renal and urinary disorders |
Common |
Haematuria |
|
Reproductive system and breast disorders |
Very common |
Gynaecomastia and breast tendernessb |
|
Common |
Erectile dysfunction | |
|
General disorders and administration site conditions |
Very common |
Asthenia |
|
Common |
Chest pain Oedema | |
|
Investigations |
Common |
Weight increased |
a. Hepatic changes are rarely severe and were frequently transient, resolving or improving with continued therapy or following cessation of therapy.
b. The majority of patients receiving bicalutamide 150 mg as monotherapy experience gynaecomastia and/or breast pain. In studies these symptoms were considered to be severe in up to 5% of the patients. Gynaecomastia may not resolve spontaneously following cessation of therapy, particularly after prolonged treatment .
c. Due to the coding conventions used in the EPC studies, adverse events of 'dry skin' were coded under the COSTART term of 'rash'. No separate frequency descriptor can therefore be determined for the 150 mg bicalutamide dose however the same frequency as the 50 mg dose is assumed.
d. Listed as an adverse drug reaction following review of post-marketed data. Frequency has been determined from the incidence of reported adverse events of hepatic failure in patients receiving treatment in the open-label bicalutamide arm of the 150 mg EPC studies.
e. Listed as an adverse drug reaction following review of post-marketed data. Frequency has been determined from the incidence of reported adverse events of interstitial pneumonia in the randomised treatment period of the 150 mg EPC studies.
Reporting of suspected adverse reactions
Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard.
4.9 Overdose
There is no human experience of overdosage. Since bicalutamide belongs to the anilide compounds there is a theoretical risk of the development of methaemoglobinaemia. Methaemoglobinaemia has been observed in animals after overdose. Accordingly, a patient with an acute intoxication can be cyanotic.
There is no specific antidote; treatment should be symptomatic. Dialysis may not be helpful, since bicalutamide is highly protein bound and is not recovered unchanged in the urine. General supportive care, including frequent monitoring of vital signs, is indicated.
5 PHARMACOLOGICAL PROPERTIES
5.1 Pharmacodynamic properties
Pharmacotherapeutic group: Hormone antagonists and related agents, Antiandrogen, ATC code: L02 B B03
Bicalutamide is a non-steroidal antiandrogen, devoid of other endocrine activity. It binds to the wild type or normal androgen receptor without activating gene expression, and thus inhibits the androgen stimulus. Regression of prostatic tumours results from this inhibition. Clinically, discontinuation of bicalutamide can result in the 'antiandrogen withdrawal syndrome' in a subset of patients.
Bicalutamide 150 mg was studied as a treatment for patients with localised (T1-T2, N0 or NX, M0) or locally advanced (T3-T4, any N, M0; T1-T2, N+, M0) nonmetastatic prostate cancer in a combined analysis of three placebo controlled, doubleblind studies in 8113 patients, where bicalutamide was given as immediate hormonal therapy or as adjuvant to radical prostatectomy or radiotherapy, (primarily external
beam radiation). At 9.7 years median follow up, 36.6% and 38.17% of all bicalutamide and placebo-treated patients, respectively, had experienced objective disease progression.
A reduction in risk of objective disease progression was seen across most patient groups but was most evident in those at highest risk of disease progression. Therefore, clinicians may decide that the optimum medical strategy for a patient at low risk of disease progression, particularly in the adjuvant setting following radical prostatectomy, may be to defer hormonal therapy until signs that the disease is progressing.
No overall survival difference was seen at 9.7 years median follow up with 31.4% mortality (HR= 1.01; 95% CI 0.94 to1.09). However, some trends were apparent in exploratory subgroup analyses.
Data on progression-free survival and overall survival over time based on Kaplan-Meier estimates for patients with locally advanced disease are summarised in the following tables:
Table 1 Proportion of locally advanced disease patients with disease progression over time by therapy sub-group
|
Analysis population |
Treatment Arm |
Events (%) at 3 years |
Events (%) at 5 years |
Events (%) at 7 years |
Events (%) at 10 years |
|
Watchful waiting (n=657) |
Bicalutamide 150 mg |
19.7% |
36.3% |
52.1% |
73.2% |
|
placebo |
39.8% |
59.7% |
70.7% |
79.1% | |
|
Radiotherapy (n=305) |
Bicalutamide 150 mg |
13.9% |
33.0% |
42.1% |
62.7% |
|
placebo |
30.7% |
49.4% |
58.6% |
72.2% | |
|
Radical prostatectomy (n=1719) |
Bicalutamide 150 mg |
7.5% |
14.4% |
19.8% |
29.9% |
|
placebo |
11.7% |
19.4% |
23.2% |
30.9% |
Table 2 Overall survival in locally advanced disease by therapy sub-group
|
Analysis population |
Treatment Arm |
Events (%) at 3 years |
Events (%) at 5 years |
Events (%) at 7 years |
Events (%) at 10 years |
|
Watchful waiting |
Bicalutamide 150 mg |
14.2% |
29.4% |
42.2% |
65.0% |
|
placebo |
17.0% |
36.4% |
53.7% |
67.5% |
|
(n=657) | |||||
|
Radiotherapy (n=305) |
Bicalutamide 150 mg |
8.2% |
20.9% |
30.0% |
48.5% |
|
placebo |
12.6% |
23.1% |
38.1% |
53.3% | |
|
Radical prostatectomy (n=1719) |
Bicalutamide 150 mg |
4.6% |
10.0% |
14.6% |
22.4% |
|
placebo |
4.2% |
8.7% |
12.6% |
20.2% |
For patients with localised disease receiving bicalutamide alone, there was no significant difference in progression free survival. There was no significant difference in overall survival in patients with localised disease who received bicalutamide as adjuvant therapy, following radiotherapy (HR=0.98; 95% CI 0.80 to 1.20) or radical prostatectomy (HR=1.03; 95% CI 0.85 to 1.25). In patients with localised disease, who would otherwise have been managed by watchful waiting, there was also a trend toward decreased survival compared with placebo patients (HR=1.15; 95% CI 1.00 to 1.32). In view of this, the benefit-risk profile for the use of bicalutamide is not considered favourable in patients with localised disease.
In a separate programme, the efficacy of bicalutamide 150 mg for the treatment of patients with locally advanced non-metastatic prostate cancer for whom immediate castration was indicated, was demonstrated in a combined analysis of 2 studies with 480 previously untreated patients with non-metastatic (M0) prostate cancer. At 56% mortality and a median follow-up of 6.3 years, there was no significant difference between bicalutamide and castration in survival (hazard ratio = 1.05 [CI 0.81 to 1.36]); however, equivalence of the two treatments could not be concluded statistically.
In a combined analysis of 2 studies with 805 previously untreated patients with metastatic (M1) disease at 43% mortality, bicalutamide 150 mg was demonstrated to be less effective than castration in survival time (hazard ratio = 1.30 [CI 1.04 to 1.65]), with a numerical difference in estimated time to death of 42 days (6 weeks) over a median survival time of 2 years.
Bicalutamide is a racemate with its antiandrogen activity being almost exclusively in the R-enantiomer.
5.2 Pharmacokinetic properties
Absorption
Bicalutamide is well absorbed following oral administration. There is no evidence of any clinically relevant effect of food on bioavailability.
Distribution
Bicalutamide is highly protein bound (racemate 96%, (R)-enantiomer >99%) and extensively metabolised (oxidation and glucuronidation); its metabolites are eliminated via the kidneys and bile in approximately equal proportions.
Biotransformation
The (S)-enantiomer is rapidly cleared relative to (R)-enantiomer, the latter having a plasma elimination half-life of about 1 week.
On daily administration of bicalutamide 150 mg, the (R)-enantiomer accumulates about 10-fold in plasma as a consequence of its long half-life.
Steady state plasma concentrations of the (R)-enantiomer, of approximately 22 microgram/ml are observed during daily administration of bicalutamide 150 mg. At steady state, the predominantly active (R)-enantiomer accounts for 99% of the total circulating enantiomers.
Elimination
In a clinical study the mean concentration of R-bicalutamide in semen of men receiving bicalutamide150 mg was 4.9 microgram/ml. The amount of bicalutamide potentially delivered to a female partner during intercourse is low and by extrapolation possibly equates to approximately 0.3 microgram/kg. This is below that required to induce changes in offspring of laboratory animals.
Special populations
The pharmacokinetics of the (R)-enantiomer are unaffected by age, renal impairment or mild to moderate hepatic impairment. There is evidence that for subjects with severe hepatic impairment, the (R)-enantiomer is more slowly eliminated from plasma.
5.3 Preclinical safety data
Bicalutamide is a pure and potent androgen receptor antagonist in experimental animals and humans. The main secondary pharmacological action is induction of CYP450 dependent mixed function oxidases in liver. Enzyme induction has not been observed om humans.
Target organ changes, including tumour induction (Leydig cells, thyroid, liver) in animals, are related to these activities. Enzyme induction has not been observed in man and none of these findings is considered to have relevance to the treatment of patients with prostate cancer. Atrophy of seminiferous tubules is a predicted class effect with antiandrogens and has been observed for all species examined. Full reversal of testicular atrophy was 24 weeks after a 12-month repeated dose toxicity study in rats, although functional reversal was evident in reproduction studies 7 weeks after the end of an 11 week dosing period. A period of subfertility or infertility should be assumed in man.
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
Tablet core Lactose monohydrate Povidone K-25
Sodium starch glycolate Magnesium Stearate
Film-coating
Hypromellosed (5 cP) Titanium dioxide (E171) Propylene glycol
6.2 Incompatibilities
None
6.3 Shelf life
5 years
6.4 Special precautions for storage
This medicicne does not require any special storage conditions
6.5 Nature and contents of container
PVC/PVDC/Al blister packs of 10, 14, 20, 28, 30, 40, 50, 56, 80, 84, 90, 100, 140, 200, and 280 tablets. Not all pack sizes may be marketed.
6.6 Special precautions for disposal
Any unused medicinal product or waste material should be disposed of in accordance with local requirements.
7 MARKETING AUTHORISATION HOLDER
Bristol Laboratories Ltd,
Unit 3, Canalside,
Northbridge Road, Berkhamsted,
Herts, HP4 1EG, UK
8 MARKETING AUTHORISATION NUMBER(S)
PL 17907/0504
9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION
18/08/2015
10 DATE OF REVISION OF THE TEXT
18/08/2015