abiraterone vs dexamethasone
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of abiraterone and dexamethasone. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Zytiga
Decadron
Abiraterone (Zytiga) is a medicine used with prednisone to treat prostate cancer that has spread. It works by lowering the amount of androgen your body makes.
Dexamethasone (Decadron) is a corticosteroid medicine. It helps reduce inflammation and suppress the immune system.
Abiraterone is used to treat prostate cancer that has spread to other parts of the body. It is for cancers that are castration-resistant, meaning they no longer respond to hormone therapy alone. It is also used for high-risk castration-sensitive prostate cancer. You will take this medicine with prednisone.
This medicine treats many conditions, including allergies, skin problems, and breathing issues. It can also help with certain cancers, hormone problems, and nervous system disorders. Dexamethasone can also be used for short-term relief of arthritis and other joint problems.
Abiraterone blocks an enzyme called CYP17, which your body needs to make androgens. Androgens can help prostate cancer grow. By blocking this enzyme, abiraterone lowers androgen levels and slows cancer growth.
Dexamethasone works by decreasing inflammation in the body. It also changes how your immune system works. This can help reduce symptoms of various conditions.
- • Feeling tired
- • Joint pain
- • High blood pressure
- • Feeling sick to your stomach
- • Swelling
- • Increased appetite
- • Weight gain
- • Fluid retention
- • Mood swings
- • Insomnia
- Death 1,390
- Fatigue 1,023
- Hot Flush 678
- Asthenia 562
- Disease Progression 561
- Fatigue 16,525
- Diarrhoea 16,515
- Plasma Cell Myeloma 13,768
- Nausea 13,495
- Pneumonia 13,291
Abiraterone can cause problems with mineralocorticoid excess, like high blood pressure, low potassium, and fluid retention. If you have heart problems, your doctor will monitor you closely. This medicine can also cause liver problems, which can be severe. Your doctor will check your liver function regularly. Do not take abiraterone with radium Ra 223 dichloride. Abiraterone can harm an unborn baby, so men should use effective birth control if their partner can get pregnant.
If you have a systemic fungal infection, you should not take this medicine. Long-term use can also make it harder for your body to respond to stress.
Abiraterone can cause harm to an unborn baby. Men who are taking abiraterone should use effective birth control during treatment and for 3 weeks after the last dose if their partner is able to get pregnant. It is not known if abiraterone passes into breast milk.
Talk to your doctor if you are pregnant or breastfeeding before taking this medicine. Dexamethasone may harm an unborn baby. It can also pass into breast milk.
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How to Read This abiraterone vs dexamethasone Comparison
abiraterone is classified in the CYP17 Inhibitor drug class, while dexamethasone sits within the Corticosteroid class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, abiraterone has 4,214 submissions while dexamethasone has 73,594. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for abiraterone or dexamethasone.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.