Buy Bicalutamide
Bicalutamide

5.32
An anti-androgen medication used in the treatment of advanced prostate cancer.


Ingredient
Availability
In Stock
Delivery
Airmail (14-21 days) | EMS trackable (5-9 days)
Product is shipped in a fully discreet envelope with no content disclosure, including all required documentation inside

Product Sheet

Alternative/Local Brand
Casodex
Active Ingredient(s)
Bicalutamide
Primary Category
Cancer Treatment
Therapeutic Class
Endocrine therapy, Anti-androgens
Pharmacological Class
Non-steroidal anti-androgens
Indications
Prostate cancer
Contraindications
Women, Children, Co-administration with terfenadine or astemizole
Minor Side Effects
Hot flushes, Breast tenderness, Weakness, Nausea
Moderate Side Effects
Weight gain, Reduced sex drive, Dizziness, Constipation
Serious Side Effects
Liver damage (jaundice), Shortness of breath, Lung inflammation, Severe skin reactions
Dosage Forms
Tablet
Administration Route
Oral
Mechanism of Action
Bicalutamide works by blocking androgen (male hormone) receptors in the body. Since prostate cancer cells often need testosterone to grow, blocking these receptors helps slow or stop the progression of the cancer.
Prescription Status
Rx
Manufacturer
AstraZeneca UK Limited
Patient Summary
An anti-androgen medication used in the treatment of advanced prostate cancer.
Onset Time
Several weeks
Duration
Long-term (half-life of approx. 6 days)
Storage Instructions
Store in the original package at room temperature.
Drug Interactions
Warfarin, Ciclosporin, Calcium channel blockers
Age Restrictions
Not for use in children
Pregnancy Use
Contraindicated; not intended for use in women.
Alternative Drugs
Enzalutamide, Abiraterone, Flutamide

Bicalutamide: Generic Medication Overview

Bicalutamide is a non-steroidal anti-androgen used primarily to support the treatment of prostate cancer. It belongs to the men’s health and oncology support category and is available in a 50 mg oral pill formulation. In Hong Kong, bicalutamide is a prescription-only medication regulated by the Department of Health. The drug is also approved by the U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA) for similar indications.

How Bicalutamide Works in the Body

Bicalutamide blocks the androgen receptor, preventing testosterone and its more potent metabolite dihydrotestosterone (DHT) from binding to target cells. By inhibiting this signaling pathway, the drug reduces the growth stimulus for prostate cancer cells that rely on androgen activation. Key pharmacologic points include:

  • Receptor antagonism: Bicalutamide binds competitively to the androgen receptor with higher affinity than endogenous androgens, rendering the receptor inactive.
  • Onset of action: Clinical effects on prostate-specific antigen (PSA) levels are typically observed within 2-4 weeks of initiating therapy.
  • Duration: The drug’s half-life is approximately 5-7 days, allowing once-daily dosing.
  • Metabolism: It is metabolized primarily in the liver via CYP3A4 and excreted in the bile.

Conditions Treated by Bicalutamide

Bicalutamide is FDA- and EMA-approved for:

  • Androgen-dependent prostate cancer in combination with a luteinizing hormone-releasing hormone (LHRH) analogue or after surgical castration (orchiectomy).
  • Adjuvant therapy following prostatectomy for high-risk disease, where it helps reduce recurrence risk.

In Hong Kong, the same indications are accepted under the local oncologic guidelines. The medication is not indicated for benign prostatic hyperplasia (BPH) or hormonal therapy in women.

Off-Label and Investigational Uses

  • Female hyperandrogenism (e.g., hirsutism, acne): Small case series have explored low-dose bicalutamide, but it is not approved for this purpose in Hong Kong, the United States, or the European Union.
  • Transgender hormone therapy: Some clinicians have considered anti-androgens for feminizing regimens; however, robust trial data are lacking, and regulatory bodies have not endorsed this use.

Off-label applications require careful medical supervision and a risk-benefit assessment by a qualified provider.

Who Should (or Should Not) Use Bicalutamide?

Ideal Patient Profile

  • Adult men with confirmed androgen-dependent prostate cancer who are receiving or will receive hormonal suppression.
  • Individuals with adequate hepatic function (Child-Pugh class A or B).

Absolute Contraindications

  • Known hypersensitivity to bicalutamide or any tablet excipients.
  • Severe hepatic impairment (Child-Pugh class C).
  • Pregnancy or breastfeeding (the drug can cross the placenta and is contraindicated in women).

Relative Contraindications

  • Moderate hepatic dysfunction (Child-Pugh class B) - dose adjustment and close monitoring are advised.
  • Concurrent use of strong CYP3A4 inducers (e.g., rifampin) that may lower bicalutamide plasma concentrations.

Special Populations

  • Elderly: No specific dose reduction is required, but clinicians should monitor for increased frailty-related side effects.
  • Renal impairment: No dose adjustment is needed for mild to moderate renal dysfunction.
  • Pregnancy/Lactation: Contraindicated; women of child-bearing potential must use reliable contraception.

Safety Profile and Interactions

Common Side Effects

  • Breast tenderness or enlargement (gynecomastia): Frequently reported; may be managed with radiotherapy or surgical intervention if severe.
  • Hot flashes: Often mild and transient.
  • Nausea and mild gastrointestinal upset: Usually self-limiting.
  • Fatigue: Common during the initial weeks of therapy.

Serious Adverse Events

  • Liver toxicity: Elevations in transaminases and bilirubin have been observed; severe hepatitis is rare but requires immediate discontinuation.
  • Severe allergic reactions: Rash, angioedema, or anaphylaxis demand emergency care.
  • Cardiovascular events: Rare cases of thromboembolic phenomena have been reported, particularly in patients with pre-existing risk factors.

Drug Interactions

  • CYP3A4 inhibitors (e.g., ketoconazole, itraconazole): May increase bicalutamide concentrations, heightening toxicity risk.
  • CYP3A4 inducers (e.g., carbamazepine, phenytoin, St. John’s wort): May reduce efficacy by lowering drug levels.
  • Warfarin: Bicalutamide can potentiate anticoagulant effect; INR should be monitored closely.

Food and Lifestyle Interactions

  • Food: Can be taken with or without meals; high-fat meals do not significantly affect absorption.
  • Alcohol: No direct contraindication, but excessive intake may worsen liver toxicity.
  • Driving: Rarely impairs cognition; patients should monitor for dizziness before operating machinery.

Patients should disclose all medications, supplements, and herbal products to their prescribing clinician before starting bicalutamide.

How to Take Bicalutamide

  • Standard dosing: One 50 mg tablet taken orally once daily, preferably at the same time each day.
  • Administration: Swallow the pill whole with water; do not crush or chew.
  • Missed dose: Take the missed dose as soon as remembered on the same day; do not double the next dose.
  • Overdose: Symptoms may include severe nausea, vomiting, abdominal pain, and jaundice. Seek emergency medical care; there is no specific antidote, and treatment is supportive.
  • Discontinuation: Abrupt cessation is generally safe, but clinicians may taper based on disease status and concurrent hormonal therapy.

Dosing adjustments for hepatic impairment should follow the prescribing information and be individualized by the treating oncologist.

Monitoring and Follow-Up

  • Liver function tests (LFTs): Baseline evaluation, then every 2-4 weeks for the first three months, followed by periodic monitoring.
  • Prostate-specific antigen (PSA): Measured regularly to assess treatment response.
  • Clinical assessment: Routine evaluation of gynecomastia, hot flashes, and overall tolerability at each oncology visit.
  • Drug adherence: Verify pill counts and discuss any adverse experiences to maintain optimal therapeutic effect.

Storage and Handling

  • Store tablets at room temperature (20-25 °C), protected from moisture and direct sunlight.
  • Keep the container tightly closed and out of reach of children.
  • Do not use the medication past the printed expiration date; discard any unused tablets according to local pharmaceutical waste guidelines.

Medication-Specific Glossary

Androgen Receptor
A cellular protein that binds testosterone and dihydrotestosterone, initiating signals that promote prostate cell growth.
Anti-androgen
A class of drugs, like bicalutamide, that block androgen receptor activity, thereby reducing hormone-driven tumor proliferation.
CYP3A4
A liver enzyme responsible for metabolizing many drugs; inhibitors or inducers can alter bicalutamide levels.
Gynecomastia
Benign enlargement of male breast tissue, a common side effect of anti-androgen therapy due to altered hormonal balance.
Hepatic Metabolism
The process by which the liver chemically transforms a drug, affecting its activity and elimination.

Medical Disclaimer

This article provides educational information about bicalutamide and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.

Bicalutamide FAQ

Can I travel internationally with bicalutamide?

Yes, bicalutamide can be carried in its original labeled container. Upon arrival, you may be asked to present a copy of the prescription or a physician’s letter, especially if traveling to countries with strict drug-import regulations.

Does bicalutamide show up on drug tests for work or sports?

Standard occupational drug screens do not test for bicalutamide. However, elite sports agencies may screen for prohibited substances; anti-androgens are listed under certain doping regulations, so athletes should verify with their governing body.

What does the pill look like?

In most markets, the 50 mg tablet is white, round, and may bear the imprint “BIC 50”. In other regions, appearance can vary slightly due to manufacturer differences.

Are there any differences between Hong Kong-sourced and overseas bicalutamide?

All bicalutamide sold in Hong Kong must meet the standards of the Department of Health, ensuring consistent potency, purity, and labeling regardless of the manufacturing origin.

How long has bicalutamide been used for prostate cancer?

Bicalutamide received FDA approval in 1995 and has been incorporated into standard androgen-deprivation regimens for over two decades, with extensive post-marketing safety data.

Can bicalutamide be taken with calcium supplements?

Calcium does not interfere with the absorption or metabolism of bicalutamide, so concurrent use is generally considered safe.

What should I do if I experience severe breast pain?

Severe or rapidly worsening gynecomastia warrants prompt evaluation by your oncologist; radiation therapy or surgical options may be discussed if the discomfort is significant.

Is a generic version of bicalutamide available in Hong Kong?

Yes, several manufacturers produce generic bicalutamide tablets that contain the same active ingredient and dosage strength as the branded product.

How does the cost of bicalutamide compare to other anti-androgens?

Generic bicalutamide is typically less expensive than newer anti-androgen agents such as enzalutamide or apalutamide, but exact pricing varies by pharmacy and insurance coverage.

Can bicalutamide be stored in a travel pill organizer?

If the organizer is airtight and protects the tablets from moisture, short-term storage (a few days) is acceptable. For longer periods, keep the medication in its original container to maintain stability.

Categories