Casodex

Q: Who makes Casodex?

Casodex is listed by 1 labeler in the FDA NDC directory, including ANI Pharmaceuticals, Inc..

Bicalutamide · Tablet · Oral

Prescription (Rx) Androgen Receptor Inhibitor

Uses

1. INDICATIONS AND USAGE CASODEX 50 mg daily is indicated for use in combination therapy with a luteinizing hormone-releasing hormone (LHRH) analog for the treatment of Stage D 2 metastatic carcinoma of the prostate. CASODEX 150 mg daily is not approved for use alone or with other treatments [see Clinical Studies (14.2) ].
• CASODEX 50 mg is an androgen receptor inhibitor indicated for use in combination therapy with a luteinizing hormone-releasing hormone (LHRH) analog for the treatment of Stage D 2 metastatic carcinoma of the prostate. (1)
• CASODEX 150 mg daily is not approved for use alone or with other treatments. (1)

Dosage and administration

2. DOSAGE AND ADMINISTRATION The recommended dose for CASODEX therapy in combination with an LHRH analog is one 50 mg tablet once daily (morning or evening). (2) 2.1. Recommended Dose and Schedule The recommended dose for CASODEX therapy in combination with an LHRH analog is one 50 mg tablet once daily (morning or evening), with or without food. It is recommended that CASODEX be taken at the same time each day. Treatment with CASODEX should be started at the same time as treatment with an LHRH analog. If a dose of CASODEX is missed, take the next dose at the scheduled time. Do not take the missed dose and do not double the next dose. 2.2. Dosage Adjustment in Renal Impairment No dosage adjustment is necessary for patients with renal impairment [see Use in Specific Populations (8.7) ] . 2.3. Dosage Adjustment in Hepatic Impairment No dosage adjustment is necessary for patients with mild to moderate hepatic impairment. In patients with severe liver impairment (n=4), although there was a 76% increase in the half-life (5.9 and 10.4 days for normal and impaired patients, respectively) of the active enantiomer of bicalutamide no dosage adjustment is necessary [see Use in Specific Populations (8.6) ] .

Dosage forms and strengths

3. DOSAGE FORMS AND STRENGTHS CASODEX ® (bicalutamide) 50 mg tablets for oral administration. 50 mg tablets (3)

Contraindications

4. CONTRAINDICATIONS CASODEX is contraindicated in:
• Hypersensitivity CASODEX is contraindicated in any patient who has shown a hypersensitivity reaction to the drug or any of the tablet’s components. Hypersensitivity reactions including angioneurotic edema and urticaria have been reported.
• Women CASODEX has no indication for women, and should not be used in this population.
• Pregnancy CASODEX can cause fetal harm when administered to a pregnant woman [see Use in Specific Populations (8.1) ] .
• Hypersensitivity (4)
• Women (4)
• Pregnancy ( 4 , 8.1 )

Warnings and precautions

5. WARNINGS AND PRECAUTIONS
• Severe hepatic injury and fatal hepatic failure have been observed. Monitor serum transaminase levels prior to starting treatment with CASODEX, at regular intervals for the first four months of treatment and periodically thereafter, and for symptoms or signs suggestive of hepatic dysfunction. Use CASODEX with caution in patients with hepatic impairment. (5.1)
• Hemorrhage with Concomitant Use of Coumarin Anticoagulant. Closely monitor the Prothrombin Time (PT) and International Normalized Ratio (INR), and adjust the anticoagulant dose as needed. (5.2)
• Gynecomastia and breast pain have been reported during treatment with CASODEX 150 mg when used as a single agent. (5.3)
• CASODEX is used in combination with an LHRH agonist. LHRH agonists have been shown to cause a reduction in glucose tolerance in males. Consideration should be given to monitoring blood glucose in patients receiving CASODEX in combination with LHRH agonists. (5.4)
• Monitoring Prostate Specific Antigen (PSA) is recommended. Evaluate for clinical progression if PSA increases. (5.5) 5.1. Hepatitis Cases of death or hospitalization due to severe liver injury (hepatic failure) have been reported postmarketing in association with the use of CASODEX. Hepatotoxicity in these reports generally occurred within the first three to four months of treatment. Hepatitis or marked increases in liver enzymes leading to drug discontinuation occurred in approximately 1% of CASODEX patients in controlled clinical trials. Serum transaminase levels should be measured prior to starting treatment with CASODEX, at regular intervals for the first four months of treatment, and periodically thereafter. If clinical symptoms or signs suggestive of liver dysfunction occur (e.g., nausea, vomiting, abdominal pain, fatigue, anorexia, “flu-like” symptoms, dark urine, jaundice, or right upper quadrant tenderness), the serum transaminases, in particular the serum ALT, should be measured immediately. If at any time a patient has jaundice, or their ALT rises above two times the upper limit of normal, CASODEX should be immediately discontinued with close follow-up of liver function. 5.2. Hemorrhage with Concomitant Use of Coumarin Anticoagulant In the postmarketing setting, there have been reports of excessive prolongation of the prothrombin time (PT) and International Normalized Ratio (INR) days to weeks after the introduction of CASODEX in patients who were previously stable on coumarin anticoagulants. Some patients had serious bleeding including intracranial, retroperitoneal, and gastrointestinal requiring blood transfusion and/or administration of vitamin K. Closely monitor the PT/INR, and adjust the anticoagulant dose as needed [see Drug Interactions (7) and Adverse Reactions (6.2) ]. 5.3. Gynecomastia and Breast Pain In clinical trials with CASODEX 150 mg as a single agent for prostate cancer, gynecomastia and breast pain have been reported in up to 38% and 39% of patients, respectively. 5.4. Glucose Tolerance A reduction in glucose tolerance has been observed in males receiving LHRH agonists. This may manifest as diabetes or loss of glycemic control in those with pre-existing diabetes. Consideration should therefore be given to monitoring blood glucose in patients receiving CASODEX in combination with LHRH agonists. 5.5. Laboratory Tests Regular assessments of serum Prostate Specific Antigen (PSA) may be helpful in monitoring the patient’s response. If PSA levels rise during CASODEX therapy, the patient should be evaluated for clinical progression. For patients who have objective progression of disease together with an elevated PSA, a treatment-free period of antiandrogen, while continuing the LHRH analog, may be considered.

Side effects

6. ADVERSE REACTIONS 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 practice. Adverse reactions that occurred in more than 10% of patients receiving CASODEX plus an LHRH-A were: hot flashes, pain (including general, back, pelvic and abdominal), asthenia, constipation, infection, nausea, peripheral edema, dyspnea, diarrhea, hematuria, nocturia, and anemia. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact ANI Pharmaceuticals, Inc. at 1-855-204-1431 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch 6.1. Clinical Trials Experience In patients with advanced prostate cancer treated with CASODEX in combination with an LHRH analog, the most frequent adverse reaction was hot flashes (53%). In the multi-center, double-blind, controlled clinical trial comparing CASODEX 50 mg once daily with flutamide 250 mg three times a day, each in combination with an LHRH analog, the following adverse reactions with an incidence of 5% or greater, regardless of causality, have been reported. Table 1. Incidence of Adverse Reactions (≥ 5% in Either Treatment Group) Regardless of Causality Body System Adverse Reaction Treatment Group Number of Patients (%) CASODEX Plus LHRH Analog (n=401) Flutamide Plus LHRH Analog (n=407) Body as a Whole Pain (General) 142 (35) 127 (31) Back Pain 102 (25) 105 (26) Asthenia 89 (22) 87 (21) Pelvic Pain 85 (21) 70 (17) Infection 71 (18) 57 (14) Abdominal Pain 46 (11) 46 (11) Chest Pain 34 (8) 34 (8) Headache 29 (7) 27 (7) Flu Syndrome 28 (7) 30 (7) Cardiovascular Hot Flashes 211 (53) 217 (53) Hypertension 34 (8) 29 (7) Digestive Constipation 87 (22) 69 (17) Nausea 62 (15) 58 (14) Diarrhea 49 (12) 107 (26) Increased Liver Enzyme Test 30 (7) 46 (11) Dyspepsia 30 (7) 23 (6) Flatulence 26 (6) 22 (5) Anorexia 25 (6) 29 (7) Vomiting 24 (6) 32 (8) Hemic and Lymphatic Anemia 45 (11) 53 (13) Metabolic and Nutritional Peripheral Edema 53 (13) 42 (10) Weight Loss 30 (7) 39 (10) Hyperglycemia 26 (6) 27 (7) Alkaline Phosphatase Increased 22 (5) 24 (6) Weight Gain 22 (5) 18 (4) Musculoskeletal Bone Pain 37 (9) 43 (11) Myasthenia 27 (7) 19 (5) Arthritis 21 (5) 29 (7) Pathological Fracture 17 (4) 32 (8) Nervous System Dizziness 41 (10) 35 (9) Paresthesia 31 (8) 40 (10) Insomnia 27 (7) 39 (10) Anxiety 20 (5) 9 (2) Depression 16 (4) 33 (8) Respiratory System Dyspnea 51 (13) 32 (8) Cough Increased 33 (8) 24 (6) Pharyngitis 32 (8) 23 (6) Bronchitis 24 (6) 22 (3) Pneumonia 18 (4) 19 (5) Rhinitis 15 (4) 22 (5) Skin and Appendages Rash 35 (9) 30 (7) Sweating 25 (6) 20 (5) Urogenital Nocturia 49 (12) 55 (14) Hematuria 48 (12) 26 (6) Urinary Tract Infection 35 (9) 36 (9) Gynecomastia 36 (9) 30 (7) Impotence 27 (7) 35 (9) Breast Pain 23 (6) 15 (4) Urinary Frequency 23 (6) 29 (7) Urinary Retention 20 (5) 14 (3) Urinary Impaired 19 (5) 15 (4) Urinary Incontinence 15 (4) 32 (8) Other adverse reactions (greater than or equal to 2%, but less than 5%) reported in the CASODEX-LHRH analog treatment group are listed below by body system and are in order of decreasing frequency within each body system regardless of causality. Body as a Whole: Neoplasm; Neck Pain; Fever; Chills; Sepsis; Hernia; Cyst Cardiovascular: Angina Pectoris; Congestive Heart Failure; Myocardial Infarct; Heart Arrest; Coronary Artery Disorder; Syncope Digestive: Melena; Rectal Hemorrhage; Dry Mouth; Dysphagia; Gastrointestinal Disorder; Periodontal Abscess; Gastrointestinal Carcinoma Metabolic and Nutritional: Edema; BUN Increased; Creatinine Increased; Dehydration; Gout; Hypercholesteremia Musculoskeletal: Myalgia; Leg Cramps Nervous: Hypertonia; Confusion; Somnolence; Libido Decreased; Neuropathy; Nervousness Respiratory: Lung Disorder; Asthma; Epistaxis; Sinusitis Skin and Appendages: Dry Skin; Alopecia; Pruritus; Herpes Zoster; Skin Carcinoma; Skin Disorder Special Senses: Cataract Specified Urogenital: Dysuria; Urinary Urgency; Hydronephrosis; Urinary Tract Disorder Abnormal Laboratory Test Values: Laboratory abnormalities including: elevated AST, ALT, bilirubin, BUN, and creatinine; and decreased hemoglobin and white cell count, have been reported in both CASODEX-LHRH analog treated and flutamide-LHRH analog treated patients. 6.2. Postmarketing Experience The following adverse reactions have been identified during post-approval use of CASODEX. Because these reactions 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. Respiratory disorders: Interstitial lung disease (some fatal) including interstitial pneumonitis and pulmonary fibrosis, most often at doses greater than 50 mg. Hemorrhage: Increased PT/INR due to interaction between coumarin anticoagulants and CASODEX. Serious bleeding reported. [see Warnings and Precautions (5.2) ] Skin and subcutaneous tissue disorders: Photosensitivity

Drug interactions

7. DRUG INTERACTIONS Clinical studies have not shown any drug interactions between bicalutamide and LHRH analogs (goserelin or leuprolide). There is no evidence that bicalutamide induces hepatic enzymes. 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. Clinical studies have shown that with co-administration of CASODEX, mean midazolam (a CYP 3A4 substrate) levels may be increased 1.5-fold (for C max ) and 1.9-fold (for AUC). Hence, caution should be exercised when CASODEX is co-administered with CYP 3A4 substrates. In vitro protein binding studies have shown that bicalutamide can displace coumarin anticoagulants from binding sites. PT/INR should be closely monitored in patients concomitantly receiving coumarin anticoagulants and CASODEX. Adjustment of the anticoagulant dose may be necessary [see Warnings and Precautions (5.2) and Adverse Reactions (6.2) ].
• R-bicalutamide is an inhibitor of CYP 3A4; therefore, caution should be used when CASODEX is co-administered with CYP 3A4 substrates. (7)
• PT/INR should be closely monitored in patients already receiving coumarin anticoagulants who are started on CASODEX. (7)

Use in specific populations

8. USE IN SPECIFIC POPULATIONS
• Females and Males of Reproductive Potential: Advise males with female partners of reproductive potential to use effective contraception. (8.3)
• Pediatric patients: Efficacy has not been demonstrated for the treatment of familial male-limited precocious puberty (testotoxicosis). (8.4) 8.1. Pregnancy Risk Summary CASODEX is contraindicated for use in pregnant women because it can cause fetal harm. CASODEX is not indicated for use in females. There are no human data on the use of CASODEX in pregnant women. In animal reproduction studies, oral administration of bicalutamide to pregnant rats during organogenesis caused abnormal development of reproductive organs in male fetuses at exposures approximately 0.7 to 2 times the human exposure at the recommended dose ( see Data ). Data Animal Data In an embryo-fetal development study in pregnant rats dosed during the period of organogenesis from gestation days 6-15, male fetuses had reduced anogenital distance at doses of 10 mg/kg/day and above (approximately 0.7 to 2 times the human exposure at the recommended dose). In a pre- and post-natal development study, female rats were dosed from gestation day 7-16 and allowed to litter and rear their offspring to weaning. Male offspring of rats receiving doses of 10 mg/kg/day (approximately 0.7 times the human exposure at the recommended dose) and above, were observed to have reduced anogenital distance. In a peri- and post-natal development study, female rats were dosed from gestation day 16 to lactation day 22 and allowed to litter and rear their offspring to weaning. Survival and weights of offspring during lactation were reduced for litters from maternal rats receiving doses of 250 mg/kg/day (approximately 2 times the human exposure at the recommended dose). Male offspring of rats receiving doses of 10 mg/kg/day (approximately 0.7 times the human exposure at the recommended dose) and above, were observed to have reduced anogenital distance, smaller secondary sex organs, cryptorchidism and hypospadias resulting in an inability to mate and impregnate their female partners. Female offspring of rats receiving doses of 10 mg/kg/day (approximately 0.7 times the human exposure at the recommended dose) and above had reduced pregnancy rates. 8.2. Lactation Risk Summary CASODEX is not indicated for use in pregnant women. There is no information available on the presence of bicalutamide in human milk, or on the effects on the breastfed infant or on milk production. Bicalutamide has been detected in rat milk. 8.3. Females and Males of Reproductive Potential Contraception Males Antiandrogen therapy may cause morphological changes in spermatozoa [see Nonclinical Toxicology (13.1) ] . Based on findings in animal reproduction studies and its mechanism of action, advise male patients with female partners of reproductive potential to use effective contraception during treatment and for 130 days after the final dose of CASODEX [see Use in Specific Populations (8.1) and Clinical Pharmacology (12.1) ] . Infertility Males Based on animal studies, CASODEX can lead to inhibition of spermatogenesis and may impair fertility in males of reproductive potential. The long-term effects of CASODEX on male fertility have not been studied [see Nonclinical Toxicology (13.1) ] . 8.4. Pediatric Use The safety and effectiveness of CASODEX in pediatric patients have not been established. CASODEX (bicalutamide) orodispersible tablet was studied in combination with ARIMIDEX (anastrozole) orodispersible tablet in an open-label, non-comparative, multi-center study that assessed the efficacy and safety of this combination regimen over 12 months in the treatment of gonadotropin-independent precocious puberty in boys with familial male-limited precocious puberty, also known as testotoxicosis. Patients were enrolled in the study if they had a baseline age ≥2 years and a diagnosis of testotoxicosis based on clinical features of progressive precocious puberty, symmetrical testicular enlargement, advanced bone age, pubertal levels of serum testosterone, prepubertal pattern of gonadotropin secretion following a GnRH stimulation test, and absence of other clinical and biochemical causes of testosterone excess. Thirteen out of the 14 patients enrolled completed 12 months of combination treatment (one patient was lost to follow-up). If central precocious puberty (CPP) developed an LHRH analog was to be added. Four patients were diagnosed with CPP during the 12-month study and received LHRH analog treatment and 2 additional patients were diagnosed at the end of the 12 months and received treatment subsequently. Mean ± SD characteristics at baseline were as follows: chronological age: 3.9±1.9 years; bone age 8.8±2.5; bone age/chronological age ratio: 2.06±0.51; growth rate (cm/yr): 10.81±4.22; growth rate standard deviation score (SDS): 0.41±1.36. The starting CASODEX dose was 12.5 mg. CASODEX was titrated in each patient until steady-state R-bicalutamide (the active isomer of bicalutamide) trough plasma concentration reached 5-15 mcg/mL, which is the range of therapeutic concentrations achieved in adults with prostate cancer following the administration of the currently approved CASODEX dose of 50 mg. The starting daily dose of anastrozole was 0.5 mg. Anastrozole was independently titrated in each patient until it reached at steady-state a serum estradiol concentration of <10 pmol/L (2.7 pg/mL). The following ascending doses were used for CASODEX: 12.5 mg, 25 mg, 50 mg, and 100 mg. For anastrozole there were two ascending doses: 0.5 mg and 1 mg. At the end of the titration phase, 1 patient was on 12.5 mg CASODEX, 8 patients were on 50 mg CASODEX, and 4 patients were on 100 mg CASODEX; 10 patients were on 0.5 mg anastrozole and 3 patients were on 1 mg anastrozole. In the majority of patients, steady-state trough concentrations of R-bicalutamide appeared to be attained by Day 21 with once daily dosing.

Pregnancy

8.1. Pregnancy Risk Summary CASODEX is contraindicated for use in pregnant women because it can cause fetal harm. CASODEX is not indicated for use in females. There are no human data on the use of CASODEX in pregnant women. In animal reproduction studies, oral administration of bicalutamide to pregnant rats during organogenesis caused abnormal development of reproductive organs in male fetuses at exposures approximately 0.7 to 2 times the human exposure at the recommended dose ( see Data ). Data Animal Data In an embryo-fetal development study in pregnant rats dosed during the period of organogenesis from gestation days 6-15, male fetuses had reduced anogenital distance at doses of 10 mg/kg/day and above (approximately 0.7 to 2 times the human exposure at the recommended dose). In a pre- and post-natal development study, female rats were dosed from gestation day 7-16 and allowed to litter and rear their offspring to weaning. Male offspring of rats receiving doses of 10 mg/kg/day (approximately 0.7 times the human exposure at the recommended dose) and above, were observed to have reduced anogenital distance. In a peri- and post-natal development study, female rats were dosed from gestation day 16 to lactation day 22 and allowed to litter and rear their offspring to weaning. Survival and weights of offspring during lactation were reduced for litters from maternal rats receiving doses of 250 mg/kg/day (approximately 2 times the human exposure at the recommended dose). Male offspring of rats receiving doses of 10 mg/kg/day (approximately 0.7 times the human exposure at the recommended dose) and above, were observed to have reduced anogenital distance, smaller secondary sex organs, cryptorchidism and hypospadias resulting in an inability to mate and impregnate their female partners. Female offspring of rats receiving doses of 10 mg/kg/day (approximately 0.7 times the human exposure at the recommended dose) and above had reduced pregnancy rates.

Pediatric use

8.4. Pediatric Use The safety and effectiveness of CASODEX in pediatric patients have not been established. CASODEX (bicalutamide) orodispersible tablet was studied in combination with ARIMIDEX (anastrozole) orodispersible tablet in an open-label, non-comparative, multi-center study that assessed the efficacy and safety of this combination regimen over 12 months in the treatment of gonadotropin-independent precocious puberty in boys with familial male-limited precocious puberty, also known as testotoxicosis. Patients were enrolled in the study if they had a baseline age ≥2 years and a diagnosis of testotoxicosis based on clinical features of progressive precocious puberty, symmetrical testicular enlargement, advanced bone age, pubertal levels of serum testosterone, prepubertal pattern of gonadotropin secretion following a GnRH stimulation test, and absence of other clinical and biochemical causes of testosterone excess. Thirteen out of the 14 patients enrolled completed 12 months of combination treatment (one patient was lost to follow-up). If central precocious puberty (CPP) developed an LHRH analog was to be added. Four patients were diagnosed with CPP during the 12-month study and received LHRH analog treatment and 2 additional patients were diagnosed at the end of the 12 months and received treatment subsequently. Mean ± SD characteristics at baseline were as follows: chronological age: 3.9±1.9 years; bone age 8.8±2.5; bone age/chronological age ratio: 2.06±0.51; growth rate (cm/yr): 10.81±4.22; growth rate standard deviation score (SDS): 0.41±1.36. The starting CASODEX dose was 12.5 mg. CASODEX was titrated in each patient until steady-state R-bicalutamide (the active isomer of bicalutamide) trough plasma concentration reached 5-15 mcg/mL, which is the range of therapeutic concentrations achieved in adults with prostate cancer following the administration of the currently approved CASODEX dose of 50 mg. The starting daily dose of anastrozole was 0.5 mg. Anastrozole was independently titrated in each patient until it reached at steady-state a serum estradiol concentration of <10 pmol/L (2.7 pg/mL). The following ascending doses were used for CASODEX: 12.5 mg, 25 mg, 50 mg, and 100 mg. For anastrozole there were two ascending doses: 0.5 mg and 1 mg. At the end of the titration phase, 1 patient was on 12.5 mg CASODEX, 8 patients were on 50 mg CASODEX, and 4 patients were on 100 mg CASODEX; 10 patients were on 0.5 mg anastrozole and 3 patients were on 1 mg anastrozole. In the majority of patients, steady-state trough concentrations of R-bicalutamide appeared to be attained by Day 21 with once daily dosing. Steady-state trough plasma anastrozole concentrations appeared to be attained by Day 8. The primary efficacy analysis of the study was to assess the change in growth rate after 12 months of treatment, relative to the growth rate during the ≥6 months prior to entering the study. Pre-study growth rates were obtained retrospectively. There was no statistical evidence that the growth rate was reduced during treatment. During CASODEX/ARIMIDEX treatment the mean growth rate (cm/yr) decreased by 1.6 cm/year, 95% CI (-4.7 to 1.5) p=0.28; the mean growth rate SDS decreased by 0.1 SD, 95% CI (-1.2 to 1.0) p=0.88. Table 2 shows descriptive data for growth rates for the overall population and for subgroups defined by history of previous treatment for testotoxicosis with ketoconazole, spironolactone, anastrozole or other aromatase inhibitors. Table 2. Growth Rates Analysis population Pre-study Mean Change from pre-study to 12 months % patients with growth reduction 1 Mean Median (Min, Max) Growth rate (cm/yr) All treated (n=13) 10.8 -1.6 -2.8 (-7.4, 8.4) 9/13 (69%) PT 2 (n=6) 10.3 -0.2 -2.6 3 (-7.2, 8.4) 4/6 (67%) NPT 4 (n=7) 11.2 -2.8 -2.8 (-7.4, 1.1) 5/7 (71%) Growth rate (SD units) All treated (n=13) 0.4 -0.1 -0.4 (-2.7, 3.5) 9/13 (69%) PT 2 (n=6) -0.1 +0.7 -0.2 3 (-1.6, 3.5) 4/6 (67%) NPT 4 (n=7) 0.8 -0.7 -0.4 (-2.7, 0.5) 5/7 (71%) 1. Change compared to pre study growth rate. 2. PT = Previous treatment for testotoxicosis with ketoconazole, spironolactone, anastrozole or other aromatase inhibitors. 3. Median calculated as midpoint of 3 rd and 4 th ranked observations. 4. NPT = no previous treatment for testotoxicosis with ketoconazole, spironolactone, anastrozole, or other aromatase inhibitors. Total testosterone concentrations increased by a mean of 5 mmol/L over the 12 months of treatment from a baseline mean of 10 mmol/L. Estradiol concentrations were at or below the level of quantification (9.81 pmol/L) for 11 of 12 patients after 12 months of treatment. Six of the 12 patients started treatment at an estradiol concentration below the level of quantification. There were no deaths, serious adverse events, or discontinuations due to adverse events during the study. Of the 14 patients exposed to study treatment, 13 (92.9%) experienced at least one adverse event. The most frequently reported (>3 patients) adverse events were gynecomastia (7/14, 50%), central precocious puberty (6/14, 43%), vomiting (5/14, 36%), headache (3/14, 21%), pyrexia (3/14, 21%), and upper respiratory tract infection (3/14, 21%). Adverse reactions considered possibly related to bicalutamide by investigators included gynecomastia (6/14, 43%), central precocious puberty (2/14, 14%), breast tenderness (2/14, 14%), breast pain (1/14, 7%), asthenia (1/14, 7%), increased alanine aminotransferase [ALT] (1/14, 7%), increased aspartate aminotransferase [AST] (1/14, 7%), and musculoskeletal chest pain (1/14, 7%). Headache was the only adverse reaction considered possibly related to anastrozole by investigators. For the patient who developed elevated ALT and AST, the elevation was <3X ULN, and returned to normal without stopping treatment; there was no concomitant elevation in total bilirubin.

Geriatric use

8.5. Geriatric Use In two studies in patients given 50 or 150 mg daily, no significant relationship between age and steady-state levels of total bicalutamide or the active R-enantiomer has been shown.

Overdosage

10. OVERDOSAGE Long-term clinical trials have been conducted with dosages up to 200 mg of CASODEX daily and these dosages have been well tolerated. A single dose of CASODEX that results in symptoms of an overdose considered to be life threatening has not been established. There is no specific antidote; treatment of an overdose should be symptomatic. In the management of an overdose with CASODEX, vomiting may be induced if the patient is alert. It should be remembered that, in this patient population, multiple drugs may have been taken. Dialysis is not likely to be helpful since CASODEX is highly protein bound and is extensively metabolized. General supportive care, including frequent monitoring of vital signs and close observation of the patient, is indicated.

Description

11. DESCRIPTION CASODEX ® (bicalutamide) tablets contain 50 mg of bicalutamide, a non-steroidal androgen receptor inhibitor with no other known endocrine activity. The chemical name is propanamide, N [4 cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulfonyl]-2-hydroxy-2-methyl-,(+-). The structural and empirical formulas are: Bicalutamide has a molecular weight of 430.37. The pKa is approximately 12. Bicalutamide is a fine white to off-white powder which is practically insoluble in water at 37°C (5 mg per 1000 mL), slightly soluble in chloroform and absolute ethanol, sparingly soluble in methanol, and soluble in acetone and tetrahydrofuran. CASODEX is a racemate with its antiandrogenic activity being almost exclusively exhibited by the R-enantiomer of bicalutamide; the S-enantiomer is essentially inactive. The inactive ingredients of CASODEX tablets are lactose, magnesium stearate, hypromellose, polyethylene glycol, polyvidone, sodium starch glycollate, and titanium dioxide. chem

Mechanism of action

12.1. Mechanism of Action CASODEX is a non-steroidal androgen receptor inhibitor. It competitively inhibits the action of androgens by binding to cytosol androgen receptors in the target tissue. Prostatic carcinoma is known to be androgen sensitive and responds to treatment that counteracts the effect of androgen and/or removes the source of androgen. When CASODEX is combined with LHRH analog therapy, the suppression of serum testosterone induced by the LHRH analog is not affected. However, in clinical trials with CASODEX as a single agent for prostate cancer, rises in serum testosterone and estradiol have been noted. In a subset of patients who have been treated with CASODEX and an LHRH agonist, and who discontinue CASODEX therapy due to progressive advanced prostate cancer, a reduction in Prostate Specific Antigen (PSA) and/or clinical improvement (antiandrogen withdrawal phenomenon) may be observed.

How supplied

16. HOW SUPPLIED/STORAGE AND HANDLING White, film-coated tablets (identified on one side with "Cdx50" and on the reverse with the CASODEX logo) are supplied in bottles of 30 tablets (62559-680-30). 16.1. Storage and Handling Store at controlled room temperature, 20° to 25°C (68° to 77°F) [see USP].

Storage

16.1. Storage and Handling Store at controlled room temperature, 20° to 25°C (68° to 77°F) [see USP].

Patient information

17. PATIENT COUNSELING INFORMATION Advise the patient to read the FDA-approved patient labeling (Patient Information). Dose and Schedule: Inform patients that therapy with CASODEX and the LHRH analog should be started at the same time and that they should not interrupt or stop taking these medications without consulting their healthcare provider [see Dosage and Administration (2.1) ] . Hepatitis: Inform patients that CASODEX can cause hepatitis, which may result in hepatic failure and death. Advise patients that liver function tests should be monitored regularly during treatment and to report signs and symptoms of hepatitis [see Warnings and Precautions (5.1) ] . Hemorrhage with Concomitant Use of Coumarin Anticoagulant: Inform patients that serious bleeding has occurred with reported increased anticoagulant effects while taking CASODEX. Advise patients to notify their healthcare provider of any bleeding or spontaneous bruising while on CASODEX and taking anticoagulants [see Warnings and Precautions (5.2) and Adverse Reactions (6.2) ] . Glucose Tolerance: Inform patients that diabetes or loss of glycemic control in patients with pre-existing diabetes has been reported during treatment with LHRH agonists. Consideration should therefore be given to monitoring blood glucose in patients receiving CASODEX in combination with LHRH agonists [see Warnings and Precautions (5.4) ] . Somnolence: During treatment with CASODEX, somnolence has been reported. Advise patients who experience this symptom to observe caution when driving or operating machines [see Adverse Reactions (6.1) ] . Photosensitivity: Inform patients that cases of photosensitivity have been reported during treatment with CASODEX and that they should avoid direct exposure to excessive sunlight or UV-light exposure. Consideration should be given to the use of sunscreen [see Adverse Reactions (6.2) ] . Contraception and Fertility: Advise male patients with female partners of reproductive potential to use effective contraception during treatment and for 130 days after the last dose of CASODEX therapy. Advise male patients that CASODEX may impair fertility [see Use in Specific Populations (8.3) ]. Manufactured by: Corden Pharma GmbH, Otto-Hahn-Strasse, 68723 Plankstadt, Germany Distributed by: ANI Pharmaceuticals, Inc., Baudette, MN 56623 CASODEX is a trademark of the AstraZeneca group of companies and is licensed to ANI Pharmaceuticals, Inc. ani

Label text from the FDA structured product label by ANI Pharmaceuticals, Inc. (revised Feb 27, 2026). Long sections are shortened; the complete label is on DailyMed.

Active ingredients

Bicalutamide in 1 product

Casodex NDC products (1)

NDC	Strength & form	Labeler	Type
62559-680	Bicalutamide 50 mg/1 Tablet	ANI Pharmaceuticals, Inc.	NDA

Frequently asked questions

What is Casodex used for?

What are the side effects of Casodex?

Who makes Casodex?

Casodex is listed by 1 labeler in the FDA NDC directory, including ANI Pharmaceuticals, Inc..