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Gavreto (pralsetinib)
Starting Gavreto can bring up a lot of questions, for you and for the people who love you. Here you'll find what to expect, how to feel your best day to day and where to get help, so you can focus on your life and time together.
ℹ️ General information to help you and your loved ones talk with your care team, not medical advice. Read our disclaimer.
Targeted therapy pill (RET inhibitor) · Used for: Lung cancer
💊 Taken by mouth · Targeted therapy pill (RET inhibitor)
The quick guide
What it is: Targeted therapy pill (RET inhibitor).
How it's given: Tablets or capsules by mouth once a day on an empty stomach.
How it works: Gavreto blocks RET in lung cancers with RET fusions.
Side effects you may notice, and what helps at home
| Side effect | What can help |
|---|---|
| Neutropenia (low blood counts and infection risk) | Wash hands often; check your temperature if you feel unwell. |
| Constipation (hard or infrequent stools) | Fluids, fiber if allowed, daily walks. |
| High blood pressure | Tell your care team; they can help. |
| Fatigue (extreme tiredness) | Short walks and planned rest. |
| Muscle pain | Tell your care team; they can help. |
Not everyone gets these. Your team may suggest other ways to manage them.
Call your care team now if you have:
- ⚠️ Boxed warning (FDA's most serious): Serious infections, including unusual (opportunistic) infections. Call about fever, cough or other infection signs.
- New cough or shortness of breath
- Bleeding
- Very high blood pressure
Call 911 for trouble breathing, chest pain or signs of stroke.
🗓 What to expect
1️⃣ Before you start
- Ask your team for a written schedule and an after-hours phone number.
- Bring a list of all your medicines and supplements.
2️⃣ Each day on treatment
- Take it exactly as prescribed, at about the same time each day.
- Don't crush or split pills unless your team says it's OK.
- If you miss a dose, follow the label instructions or call your pharmacist.
3️⃣ Between doses
- Watch for the side effects below and use the checklist.
- Keep up with blood tests and visits.
- Call your team for anything in the red box.
✅ Side-effect checklist
Print this and check off what you notice so you can tell your team.
| Side effect | Noticed? | Notes for my team |
|---|---|---|
| Neutropenia (low blood counts and infection risk) | ☐ | |
| Constipation (hard or infrequent stools) | ☐ | |
| High blood pressure | ☐ | |
| Fatigue (extreme tiredness) | ☐ | |
| Muscle pain | ☐ |
Help paying for Gavreto (pralsetinib)
Gavreto (pralsetinib) is made by Rigel.
Official manufacturer program:
- Gavreto support: Savings and support information.
Copay cards are usually only for people with commercial (job or marketplace) insurance. If you have Medicare or Medicaid, look at free-drug programs and these independent foundations:
- PAN Foundation: Copays and coinsurance, including for people with Medicare, when a disease fund is open.
- HealthWell Foundation: Grants for copays, deductibles and premiums when a fund is open.
- CancerCare Co-Payment Assistance Foundation: Help with treatment copays for insured people under income limits.
- Good Days: Copay help and some travel costs.
- NeedyMeds: Free database of assistance programs, open to anyone.
📋 Medicare: Pills you take at home are usually covered by Medicare drug coverage (Part D). Part B covers some cancer drugs taken by mouth if the same drug comes in an injectable form. See Medicare and your cancer drugs.
More: Help from drug makers · Our guide to paying for cancer treatment.
❓ Questions you and your loved ones can ask
- What is the goal of this treatment for me?
- How will we know if it's working?
- Which side effects should I call about right away, and what number do I call after hours?
- Which medicines, vitamins or supplements should I avoid?
- Will this affect my ability to work, drive or care for my family?
- What will this cost me, and who can help me with coverage?
Support for you and your family
- LUNGevity: Patient education, support groups and survivorship programs
- GO2 for Lung Cancer: Helpline, biomarker testing support and navigation
- CancerCare: Free counseling, support groups and financial help
- Cancer Support Community: Support groups, a helpline and the MyLifeLine online community
Questions people often ask
How does Gavreto work?
Gavreto blocks RET in lung cancers with RET fusions..
How is Gavreto given?
Tablets or capsules by mouth once a day on an empty stomach.
📄 The official FDA label for Gavreto (pralsetinib), including its patient information section, is on DailyMed.
Written by the Cancer Side Effects Guide team from FDA labels and leading cancer centers. Not medical advice. · Last updated: October 15, 2026 · How we write