Bicalutamide 50 Mg Film-Coated Tablets
SUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Bicalutamide 50 mg Film-coated Tablets
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
One tablet contains 50 mg of bicalutamide.
Excipients: Contains 64.4 mg lactose monohydrate.
For a full list of excipients, see section 6.1.
3 PHARMACEUTICAL FORM
Film-coated tablet.
White or almost white, round, biconvex film-coated tablet, with engraved sign “L” on one side and “RG” on the other side.
4 CLINICAL PARTICULARS
4.1 Therapeutic indications
Treatment of advanced prostate cancer in combination with luteinizing hormonereleasing hormone (LHRH) analogue therapy or surgical castration.
4.2 Posology and method of administration
Adult males including the elderly
One 50 mg tablet once a day.
Route: oral
The tablets should be swallowed whole with liquid.
Treatment with Bicalutamide should be started at least 3 days before commencing treatment with an LHRH analogue, or at the same time as surgical castration.
Children and adolescents
Bicalutamide is not indicated in children and adolescents.
Renal impairment
No dose 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).
Hepatic impairment
No dose adjustment is necessary for patients with mild hepatic impairment The medicinal product may accumulate in patients with moderate to severe hepatic impairment (see section 4.4).
4.3 Contraindications
Hypersensitivity to bicalutamide or any of the excipients.
Bicalutamide is contraindicated in women and children.
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 and subsequently patients should be kept under regular surveillance.
Bicalutamide is metabolised in the liver. Research results suggest that bicalutamide’s elimination may be slower in patients with severe hepatic impairment and that this could lead to increased accumulation of bicalutamide. Therefore, bicalutamide should be used with caution in patients with moderate to severe hepatic impairment.
Severe hepatic damages have been rarely observed with bicalutamide (see section 4.8). Bicalutamide therapy should be discontinued if changes are severe.
Periodic liver function testing is warranted in order to find out about possible hepatic changes. The majority of changes are expected to occur within the first 6 months of bicalutamide therapy.
As there is no experience with the use of bicalutamide in patients with severe renal impairment (creatinine clearance < 30 ml/min), bicalutamide should only be used with caution in these patients.
Periodical monitoring of cardiac function is advisable in patients with heart disease.
The product 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
No pharmacological or pharmacokinetic interactions have been demonstrated between bicalutamide and LHRH analogues.
In vitro studies have shown that the R-enantiomer of bicalutamide is an inhibitor of CYP 3A4 with lesser inhibitory effects on CYP 2C9, 2C19 and 2D6 activity.
Although in vitro studies have indicated the possibility of bicalutamde inhibiting cytochrome 3A4, a number of clinical studies show that the scale of this inhibition for most drugs metabolised by cytochrome P450 is probably not clinically significant.
Nonetheless, for drugs with a narrow therapeutic index metabolised in the liver, the CYP 3A4 inhibition caused by bicalutamide could be of relevance. As such, concomitant use of terfenadine, astemizole and cisapride is contra-indicated.
Caution should be exercised with the co-administration of bicalutamide with compounds such as cyclosporin and calcium channel blockers. Dosage reduction may be required for these drugs particularly if there is evidence of enhanced or adverse drug effect. For cyclosporin, it is recommended that plasma concentrations and clinical condition are closely monitored following initiation or cessation of bicalutamide therapy.
Caution should be exercised when administering bicalutamide to patients taking medicinal products that inhibit the oxidation processes in the liver, e.g. cimetidine and ketoconazole. 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 site. It is therefore recommended that prothrombin time is closely monitored if bicalutamide is started in patients who are already receiving coumarin anticoagulants.
4.6 Pregnancy and lactation
Not applicable, since this medicinal product is not used in women.
4.7 Effects on ability to drive and use machines
No studies on the effects on the ability to drive and use machines have been performed. However, it should be noted that occasionally dizziness or somnolence may occur (see section 4.8). Any affected patients should exercise caution.
4.8
Undesirable effects
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).
Immune system disorders
Uncommon: Hypersensitivity reactions, including angio-oedema and urticaria
Psychiatric disorders
Uncommon: Depression
Respiratory, thoracic and mediastinal disorders
Uncommon: Interstitial lung disease
Gastrointestinal disorders
Common: Diarrhoea, nausea
Rare: Vomiting
Hepatobiliary disorders
Common: Hepatic changes (elevated levels of transaminases, cholestasis and jaundice)1
Very rare: Hepatic failure2
Skin and subcutaneous tissue disorders
Common: Pruritus
Rare: Dry skin
Renal and urinary disorders
Uncommon: Haematuria
Reproductive system and breast disorders
Very common: Breast tenderness3, gynaecomastia3
General disorders and administration site conditions
Very common: Hot flushes3
Common: Asthenia
1 Hepatic changes are rarely severe and were frequently transient, resolving or improving with continued therapy or following cessation of therapy (see section 4.4).
2 Hepatic failure has occurred very rarely in patients treated with bicalutamide, but a casual relationship has not been established with certainty. Periodic liver function testing should be considered (see also section 4.4).
3 May be reduced by concomitant castration.
In addition, the following adverse experiences were reported in clinical trials during treatment with bicalutamide with/without a LHRH analogue:
Blood and lymphatic system disorders
Common: Anaemia
Very rare: Thrombocytopenia
Metabolism and nutrition disorders
Common: Diabetes mellitus, weight gain
Uncommon: Anorexia, hyperglycaemia, weight loss
Nervous system disorders
Common: Dizziness, insomnia
Uncommon: Somnolence
Cardiac disorders
Very rare: Heart failure, angina, conduction defects including PR and QT interval prolongations, arrhythmias and non-specific ECG changes
Respiratory, thoracic and mediastinal disorders
Uncommon: Dyspnoea
Gastrointestinal disorders
Common: Constipation
Uncommon: Dry mouth, dyspepsia, flatulence
Skin and subcutaneous tissue disorders
Common: Rash, sweating, hirsutism
Uncommon: Alopecia
Renal and urinary disorders
Uncommon: Nocturia
Reproductive system and breast disorders
Very common: Decreased libido, erectile dysfunction, impotence
General disorders and administration site conditions
Common: Oedema, general pain, pelvic pain, chills
Uncommon: Abdominal pain, chest pain, headache, pain in the back, neck pain
4.9 Overdose
No case of overdose has been reported. Since bicalutamide belongs to the anilide compounds there is a theoretical risk of the development of methaemoglobinaemia. Methaemoglobinaemia has been observed in animals after an overdose. Accordingly, a patient with an acute intoxication can be cyanotic. There is no specific antidote; treatment should be symptomatic. Dialysis is unlikely to 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, anti-androgens ATC code: L02BB03.
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 is a racemate with its anti-androgenic activity being almost exclusively associated with the (R)-enantiomer.
5.2 Pharmacokinetic properties
Bicalutamide is well absorbed following oral administration. There is no evidence of any clinically relevant effect of food on bioavailability.
The (S)-enantiomer is rapidly cleared relative to the (R)-enantiomer, the latter having a plasma elimination half-life of about 1 week.
Following a long-term administration of bicalutamide, the peak concentration of the (R)-enantiomer in the plasma is about 10-fold, as compared to the levels measured after a single dose of 50 mg of bicalutamide.
A dosing scheme of 50 mg bicalutamide daily will result in a steady-state concentration of the R-enantiomer of 9 pg/ml and as a consequence of its long halflife, steady state is reached after approximately 1 month of therapy.
The pharmacokinetics of the (R)-enantiomer are unaffected by age, renal impairment or mild to moderate hepatic impairment. There is evidence that the (R)-enantiomer is more slowly eliminated from plasma in patients with severe hepatic impairment.
Bicalutamide is highly protein bound (racemate to 96%, (R)-enantiomer 99%) and extensively metabolised (by oxidation and glucuronidation). Its metabolites are eliminated via the kidneys and bile in approximately equal proportions.
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 the liver. Enzyme induction has not been observed in humans. Target organs changes in animals are clearly related to the primary and secondary pharmacological action of bicalutamide. These comprise involution of androgen-dependent tissues; thyroid follicular adenomas, hepatic and Leydig cell hyperplasias and neoplasias or cancer; disturbance of male offspring sexual differentiation; reversible impairment of fertility in males. Genotoxicity studies did not reveal any mutagenic potential of bicalutamide. All adverse effects observed in animal studies are considered to have no relevance to the treatment of patients with advanced prostate cancer.
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
Tablet core:
Silica, colloidal anhydrous,
Magnesium stearate,
Povidone K-30,
Sodium starch glycolate (Type A),
Lactose monohydrate.
Film-coating:
Opadry II 33G28523 White (Triacetin, Macrogol 3350, Lactose monohydrate, Titanium dioxide (E171), Hypromellose).
6.2 Incompatibilities
Not applicable.
6.3 Shelf life
3 years
6.4
Special precautions for storage
This medicinal product does not require any special storage conditions.
6.5 Nature and contents of container
10, 14, 20, 28, 30, 40, 50, 56, 80, 84, 90, 100, 140, 200, 280 film-coated tablets in blister packs (PVC/PVDC/ aluminium foil)
Not all pack sizes may be marketed.
6.6 Special precautions for disposal
No special requirements.
7 MARKETING AUTHORISATION HOLDER
Gedeon Richter Plc.
1103 Budapest Gyomroi ut 19-21 Hungary
8 MARKETING AUTHORISATION NUMBER(S)
PL 04854/0029
9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION
03/07/2008
10 DATE OF REVISION OF THE TEXT
03/07/2008