YONSA® Co-Pay Terms and Conditions

To participate in the YONSA® Co-Pay Program ("Program"), you must present this card, along with a valid prescription for YONSA® to your pharmacist. Patients with commercial health insurance who qualify to participate may pay as little as $0 per month for one YONSA® prescription. Enrollment is subject to the Eligibility Rules and Terms and Conditions, stated below. If you have any questions regarding Eligibility, the Terms and Conditions, or to discontinue participation, please call 1-855-984-6307 (8:00 AM-8:00 PM EST, Monday-Friday).

Eligibility Rules

  • To participate in this Program, you must have commercial health insurance and be a resident of the United States, Puerto Rico, Guam, or the Virgin Islands
  • Patients who are members of health plans (often termed "maximizer" plans) that claim to reduce their patients' out-of-pocket costs may have a reduced maximum program benefit of $6,000 per calendar year. Out-of-pocket costs may be co-pay, co-insurance, or deductible
  • The following patients are ineligible for this Program:
    • Patients covered under Medicaid (including Medicaid patients enrolled in a Medicaid Managed Care Plan or a qualified health plan purchased through a health insurance exchange marketplace established by a state government or the federal government)
    • Patients covered by Medicare or a Medicare Part D or Medicare Advantage plan (regardless of whether a specific prescription is covered)
    • Patients covered by TRICARE, CHAMPUS, Puerto Rico Government Health Insurance Plan or any other state or federal medical or pharmaceutical benefit program or pharmaceutical assistance program
    • Patients who are members of health plans that claim to eliminate their out-of-pocket costs are not eligible for cost support. If you are a member of one of these plans, please call 1-877-264-2440
    • Patients with no insurance

Terms and Conditions

  • You agree to not to seek any reimbursement for all or any part of the co-pay assistance received through the Program. By using this card, you are certifying that you understand the Eligibility Rules and Terms and Conditions, that you have responded truthfully to questions when activating the card, and that you will disclose and report your receipt of any Program benefits to your insurer, health plan, or any third party that pays or reimburses you for the cost of medications, if required
  • This offer may be rescinded, revoked, or cancelled at any time, without further notice, and the rules may be amended at any time, without further notice


  • This Program is not insurance
  • The Program is void where prohibited by law, taxed, or restricted. Any benefit provided is not transferable and cannot be combined with any other program, free trial, discount, prescription savings card, or other offer. No purchase, other than for a YONSA® prescription, is required to participate
  • Personal data that you provide to the Program may be collected, analyzed, and shared with the program sponsor for market research and other lawful purposes, but only in aggregated and de-identified form




YONSA® (abiraterone acetate) is a prescription medicine that is used along with methylprednisolone to treat men with prostate cancer that has spread to other parts of the body and no longer responds to medical or surgical treatment that lowers testosterone.

It is not known if YONSA® is safe and effective in females or children.


Before taking YONSA®, tell your healthcare provider about all of your medical conditions, including if you:

  • have heart problems
  • have liver problems
  • have a history of adrenal problems
  • have a history of pituitary problems
  • are receiving any other treatment for prostate cancer
  • have a partner who is pregnant or may become pregnant
    • Males who have female partners who are able to become pregnant should use effective birth control (contraception) during treatment with YONSA® and for 3 weeks after the final dose of YONSA®
    • Females who are or may become pregnant, or who are breastfeeding, should not handle YONSA® tablets if broken, crushed, or damaged without protection, such as gloves. YONSA® can cause harm to an unborn baby and loss of pregnancy (miscarriage)
    • YONSA® may cause fertility problems in males, which may affect the ability to father children. Talk to your healthcare provider if you have concerns about fertility

Tell your healthcare provider about all your medicines and treatments, including prescription and over-the-counter medicines, vitamins, and herbal supplements. YONSA® can interact with many other medicines.

You should not start or stop any medicine before you talk with the healthcare provider who prescribed YONSA®.

How should I take YONSA®?

  • Take YONSA® and methylprednisolone exactly as your healthcare provider tells you
  • Take your prescribed dose of YONSA® one time a day. Take your prescribed dose of methylprednisolone two times a day
  • YONSA® contains abiraterone acetate. YONSA® and other medicines that contain abiraterone acetate may not be the same
    • Do not switch between YONSA® and other medicines that contain abiraterone acetate unless your healthcare provider tells you to
    • Follow your healthcare provider's instructions carefully if you are switching between YONSA® and another medicine that contains abiraterone acetate
    • Do not take YONSA® and other medicines that contain abiraterone acetate on the same day
    • If you do not have enough YONSA® to take your full dose or if you have any other questions about YONSA®, talk with your healthcare provider or pharmacist
  • Your healthcare provider may change your dose of YONSA® if needed
  • Do not change or stop taking your prescribed dose of YONSA® or methylprednisolone without talking with your healthcare provider first
  • Take YONSA® with or without food
  • Swallow YONSA® tablets whole. Do not crush or chew tablets
  • Take YONSA® with water
  • If you miss a dose of YONSA® or methylprednisolone, take your prescribed dose the following day. If you miss more than one dose, tell your healthcare provider right away
  • If you are receiving gonadotropin-releasing hormone (GnRH) therapy, you should continue your therapy during treatment with YONSA® and methylprednisolone
  • If you take too much YONSA®, call your healthcare provider or go to the nearest hospital emergency room right away
  • Your healthcare provider will do blood tests to check for side effects

What are the possible side effects of YONSA®?

YONSA® may cause serious side effects, including:

  • High blood pressure (hypertension), low blood potassium levels (hypokalemia), fluid retention (edema), and irregular heartbeats can happen during treatment with YONSA®. This can be life-threatening. To decrease the chance of this happening, you must take methylprednisolone with YONSA® exactly as your healthcare provider tells you. Your healthcare provider will check your blood pressure, do blood tests to check your potassium levels, and check for any signs and symptoms of fluid retention every month during treatment with YONSA®

    Tell your healthcare provider if you get any of the following symptoms:
    • dizziness
    • fast or irregular heartbeats
    • feel faint or lightheaded
    • headache
    • confusion
    • muscle weakness
    • pain in your legs
    • swelling in your legs or feet
  • Adrenal problems may happen if you stop taking methylprednisolone, get an infection, or are under stress
  • Severe liver problems. You may develop changes in liver function blood tests. Your healthcare provider will do blood tests to check your liver before treatment with YONSA® and during treatment with YONSA®. Liver failure may occur, which can lead to death. Tell your healthcare provider right away if you notice any of the following changes:
    • yellowing of the skin or eyes
    • darkening of the urine
    • severe nausea or vomiting
  • Increased risk of bone fracture and death when YONSA® and methylprednisolone are used in combination with a type of radiation called radium Ra 223 dichloride. Tell your healthcare provider about any other treatments you are taking for prostate cancer
  • Severe low blood sugar (hypoglycemia). Severe low blood sugar with abiraterone acetate can happen in people who have diabetes and take certain antidiabetic medicines. You and/or your healthcare provider should check your blood sugar levels regularly during treatment with abiraterone acetate and after you stop treatment. Your healthcare provider may also need to change the dose of your antidiabetic medicines. Signs and symptoms of low blood sugar may include:
    • headache
    • drowsiness
    • weakness
    • dizziness
    • confusion
    • irritability
    • hunger
    • fast heartbeat
    • sweating
    • feeling jittery

The most common side effects of YONSA® include:

  • feeling weak or tired
  • joint swelling or pain
  • swelling in your legs or feet
  • hot flushes
  • diarrhea
  • vomiting
  • cough
  • high blood pressure
  • shortness of breath
  • urinary tract infection
  • bruising
  • low red blood cells (anemia)
  • high blood cholesterol and triglycerides
  • high blood sugar levels
  • changes in liver function blood tests
  • low blood potassium levels
  • certain other abnormal blood tests

These are not all the possible side effects of YONSA®. Call your healthcare provider for medical advice about side effects. You may report side effects to FDA at 1‑800‑FDA‑1088.

Please see Full Prescribing Information.