Abiraterone Interactions: — Steroids, BP Medicines and Herbal Products

Most blood pressure medicines can continue, but your team needs to review your specific one. Abiraterone can itself cause fluid retention and raised blood pressure, so your team may need to start or increase a medicine rather than stop one. The exception is spironolactone, which is usually substituted before you begin. Bring your full medicine list — including doses and frequency — to your first appointment.

Spironolactone is used for fluid retention, blood pressure, and heart conditions. Abiraterone disrupts a hormone pathway in a way that can raise blood pressure and lower potassium, and prednisone is given alongside abiraterone specifically to manage that effect. Spironolactone interferes with the same pathway, making the side effects harder to monitor and manage. Your team will usually switch you to a different medicine before you start.

Yes. St. John's Wort activates a family of liver enzymes that process many medicines, including abiraterone. When those enzymes are more active, abiraterone is cleared from your body faster, so less reaches your tumour. The effect is clinically meaningful, not marginal. Both NCCN and EMA list it as something to stop before treatment begins. If you have been taking it, tell your team so they can advise on timing.

Yes, and this is one of the most practically important instructions for this medicine. Taking abiraterone with a meal — especially a fatty one — significantly increases how much is absorbed, well beyond what the dose is designed for. This can amplify side effects. Your dispensing label specifies the gap required before and after food; setting a consistent daily time when you know you will be fasted is the simplest way to get this right every day.

Check with your team before taking any anti-inflammatory medicine. Abiraterone can cause fluid retention and blood pressure changes, and anti-inflammatories like ibuprofen and diclofenac can worsen both. They can also place additional strain on the kidneys, which your team will be monitoring throughout treatment. Paracetamol is usually preferred for ordinary pain while on abiraterone, but confirm with your team first — particularly if you take anti-inflammatories regularly for another condition.

Tell your team about every Ayurvedic or herbal product before you start. Most of these have not been studied alongside abiraterone, so the interaction risk is unknown rather than confirmed safe. Some products contain minerals or plant compounds that may affect your potassium levels or steroid balance. Others may affect liver enzymes. Telling your team is not an instruction to stop — it is a chance to make a joint decision with the right information in front of you.

Tell your team as soon as you can. Do not stop the medicine yourself without advice, and do not delay mentioning it because you are worried about the answer. For most interactions, stopping the other medicine a short time before starting abiraterone resolves the concern, or a substitute can be used. Your team will not begin abiraterone while a serious unresolved interaction is in place — they will address it first. Early disclosure gives the most options.

Write down every tablet, capsule, injection, inhaler, skin patch, eye drop, and supplement you use, including anything taken occasionally rather than every day. Include the name, dose, and how often you take it. Photographing the labels on your medicine packets is faster than trying to spell names during a consultation. Ayurvedic, Unani, homeopathic, and over-the-counter vitamins all count. Hand the list at your first appointment and update your team at every visit if anything changes.