Venclexta (Venetoclax) is a prescription oral targeted therapy used to treat certain blood cancers including chronic lymphocytic leukemia, small lymphocytic lymphoma, and acute myeloid leukemia in adults.

What Is Venclexta?

Venclexta is the brand name for Venetoclax, a targeted cancer medication classified as a BCL-2 inhibitor. It is manufactured by AbbVie Inc. and Genentech (a member of the Roche Group).

Unlike traditional chemotherapy, Venclexta is a targeted therapy — it zeroes in on a specific protein that cancer cells depend on for survival. It was first approved by the FDA in 2016 for certain types of CLL, and its approved uses have expanded since then.

Venclexta is not a controlled substance and is available only by prescription from a specialist. It is also marketed as Venclyxto outside the United States.

What Is Venclexta Used For?

Venclexta is FDA-approved for the following conditions in adults:

Chronic Lymphocytic Leukemia (CLL) and Small Lymphocytic Lymphoma (SLL)

Venclexta is approved for CLL and SLL in adults, either as a standalone treatment or in combination with:

• Obinutuzumab
• Rituximab
• Acalabrutinib (Calquence)

Acute Myeloid Leukemia (AML)

Venclexta is approved for newly diagnosed AML in adults aged 75 or older, or in adults who have other health conditions that make intensive chemotherapy too risky. For AML, it's used in combination with:

• Azacitidine
• Decitabine
• Low-dose Cytarabine

Some doctors also use Venclexta off-label for conditions like relapsed mantle cell lymphoma and Waldenström macroglobulinemia, though these are not FDA-approved indications.

How Is Venclexta Taken?

Venclexta is an oral tablet taken once daily with a meal and water. Tablets should be swallowed whole — do not chew, crush, or break them.

Available Strengths

• 10 mg tablet
• 50 mg tablet
• 100 mg tablet
• Starter pack (contains 10 mg, 50 mg, and 100 mg tablets for the ramp-up phase)

Dosing Schedule for CLL/SLL

Venclexta uses a 5-week dose ramp-up to reduce the risk of tumor lysis syndrome (TLS):

1. Week 1: 20 mg daily
2. Week 2: 50 mg daily
3. Week 3: 100 mg daily
4. Week 4: 200 mg daily
5. Week 5 and ongoing: 400 mg daily

During ramp-up, patients must drink 6–8 glasses (about 56 ounces) of water daily, starting 2 days before the first dose.

Dosing Schedule for AML

AML uses a faster 4-day ramp-up:

1. Day 1: 100 mg
2. Day 2: 200 mg
3. Day 3 and ongoing: 400 mg daily

Take Venclexta at approximately the same time each day. For more about what to expect during treatment and how the medication works, see our detailed guides.

Who Should Not Take Venclexta?

Venclexta may not be right for everyone. You should not take Venclexta if:

• You are taking strong CYP3A inhibitors (such as Ketoconazole, Itraconazole, Posaconazole, Voriconazole, or Clarithromycin) during the dose ramp-up phase
• You have a known hypersensitivity to Venetoclax or any of its inactive ingredients

Tell your doctor if you:

• Have kidney problems — increases TLS risk
• Have liver problems — may need dose adjustments
• Are pregnant or planning to become pregnant — Venclexta may cause harm to an unborn baby
• Are breastfeeding — it is not known if Venclexta passes into breast milk
• Have electrolyte imbalances

For a full list of drug interactions to be aware of, see our dedicated guide.

How Much Does Venclexta Cost?

Venclexta is an expensive specialty medication:

• Cash price: Approximately $15,000–$16,000 per month for the standard 400 mg daily dose (120 tablets of 100 mg)
• Starter pack: Around $3,400
• Per tablet (100 mg): Approximately $131–$139 each
• Generic available: No — as of 2026, there is no generic version of Venetoclax

Most commercial insurance plans and Medicare cover Venclexta, but it typically requires prior authorization and is placed on specialty or highest formulary tiers.

Ways to Save

• Genentech Oncology Co-pay Assistance Program: Eligible commercially insured patients may pay $0 in out-of-pocket costs. Call 855-692-6729 or visit copayassistancenow.com.
• VENCLEXTA Access Solutions: Provides free drug for uninsured or underinsured patients who qualify, plus reimbursement support for insured patients.
• Genentech Patient Foundation: Free medication for eligible uninsured patients.
• HealthWell Foundation: Co-pay assistance for eligible patients.

For a complete breakdown, see our guide on how to save money on Venclexta.

Final Thoughts

Venclexta represents a major advance in treating blood cancers like CLL, SLL, and AML. As a targeted therapy, it offers a different approach than traditional chemotherapy — but it still requires careful monitoring, especially during the dose ramp-up period.

If you've been prescribed Venclexta, work closely with your hematologist-oncologist, follow the dosing schedule exactly, stay hydrated, and don't skip lab appointments. And if cost or access is a concern, Medfinder can help you find the medication and savings programs to make treatment affordable.