Bicalutamide is a non-steroidal anti-androgen used to block the effects of testosterone in the body.
Bicalutamide belongs to a group of medicines called non-steroidal anti-androgens. It works by blocking male hormones that can stimulate the growth of certain cancers. In Hong Kong, bicalutamide is approved for use in several prescription products, most notably Casodex and generic tablets simply labeled bicalutamide.
The two main products that contain bicalutamide are:
Both are available in 150 mg tablets, the dose most commonly prescribed for cancer treatment. They are taken by mouth and come in plain white tablets. While the brand name is widely recognised, the generic version is often less expensive and may be supplied by a range of local pharmacies. All products are regulated by the Hong Kong Department of Health under the Pharmacy and Poisons Ordinance.
Bicalutamide is primarily used for hormone-sensitive prostate conditions. The most common indications include:
In each case, bicalutamide works by preventing male hormones (androgens) from binding to cancer cells, which can limit the cells’ ability to grow and divide. The medication is generally prescribed for adult men, and its use is guided by a specialist’s assessment of disease stage and overall health.
When a tablet is swallowed, bicalutamide is absorbed into the bloodstream and travels to the prostate and other tissues. It attaches to androgen receptors, the same “locks” that male hormones try to open. By blocking these receptors, bicalutamide keeps the hormones from turning the “on” switch for cancer-cell growth. The effect begins within a few days of starting treatment, though the full benefit may take several weeks to become apparent.
Most people experience only mild, short-lasting effects. Typical complaints are:
These symptoms usually lessen as the body adjusts. If they persist or cause significant discomfort, the prescribing clinician can assess whether any changes are needed.
Although rare, some reactions require immediate medical attention:
If any of these appear, seek emergency care without delay.
Certain health situations may affect the safety of bicalutamide:
Bicalutamide can interact with other medicines and lifestyle factors:
For a full list of possible interactions, refer to the product label or the dedicated page for each medication.
Store tablets at room temperature, away from moisture and direct sunlight. Keep them out of reach of children. Treatment length varies; some patients use bicalutamide for a few months, while others may continue for several years under specialist supervision. Because formulations differ between Casodex and generic bicalutamide, always follow the specific instructions that come with the product you are using. For detailed usage, dosing, and administration, refer to your medication’s individual information.
Anti-androgen: A substance that blocks the effect of male hormones in the body.
Androgen receptor: The cellular “lock” that male hormones bind to, triggering certain biological actions.
Metastatic: Cancer that has spread from its original site to other parts of the body.
This article offers general educational information about bicalutamide as an active substance used in various medicines. Its purpose is to help patients better understand the ingredient and the conditions it is used to treat. It is not a substitute for professional medical advice or for the specific instructions provided with individual products. Medicines containing bicalutamide may differ in formulation, strength, and directions for use. Always consult the labeling of your particular medication and follow your healthcare provider’s guidance for complete information on proper use, dosage, and safety.
