Abiraterone in Elderly Patients — and Those With Other Illnesses

Abiraterone interacts with a number of commonly prescribed drugs, so your oncologist needs a complete list of everything you take, including supplements and herbal remedies. Particular care is needed with medicines for epilepsy, heart rhythm problems, and certain antifungal treatments. This is not a reason to avoid abiraterone, but it is a reason to be thorough about disclosure before your first dose. Your pharmacist can also check the full list for interactions.

Age alone does not require a dose reduction. Clinical trials enrolled men well into their eighties without needing age-based adjustments. Dose decisions are based on your liver function, your overall fitness, and how you respond to the drug in the early weeks. If your liver is significantly affected, your oncologist will decide whether the dose needs to change.

Kidney disease alone does not usually require a change in abiraterone dose, because the drug is cleared primarily by the liver rather than the kidneys. That said, your potassium levels and blood pressure still need to be checked regularly, as abiraterone can lower potassium and raise blood pressure regardless of kidney function. Tell your team the severity of your kidney disease so they can plan the monitoring schedule accordingly.

Possibly, and your oncologist and the doctor managing your heart or blood pressure need to know about each other's prescriptions. Abiraterone can push blood pressure higher, which may mean your existing medicines need adjusting upward. Abiraterone also interacts with certain drugs that affect how it is metabolised in the liver. A full medication review before you start is standard practice, not an optional step.

Abiraterone is usually given alongside androgen deprivation therapy, which does accelerate bone thinning over time. Osteoporosis is already common in older men, so your oncologist will assess your bone health before treatment begins. Bone-protecting medicines such as bisphosphonates or denosumab are often recommended alongside hormonal treatment for prostate cancer. Tell your team if you already take calcium supplements or have had a fracture in recent years.

Standard checks before starting include liver function, kidney function, potassium, and a full blood count, alongside a blood pressure reading. If you are diabetic, your recent blood sugar control is also noted. These baselines let your team detect any changes that develop after treatment begins. The same checks are repeated at short intervals in the first three months, then less often once your results are stable.

Report swelling in your ankles or legs, rapid weight gain, marked shortness of breath, or an irregular heartbeat — these can be signs of fluid retention or a heart-related reaction. Also report yellowing of the skin or eyes, dark urine, or unusual tiredness, which can indicate liver changes. Muscle weakness can be a sign of low potassium. None of these is common, but all are taken seriously and are easier to manage when caught early.

Abiraterone is a tablet you take at home every day, not an infusion given in clinic. Your visits to CION are for monitoring — blood tests, blood pressure checks, and review with your oncologist — rather than for the drug itself. This makes it practical even for patients who find travelling to hospital regularly difficult. Your team will tell you how often they need to see you, which is usually more frequent in the first three months.