Generic Name: venetoclax (ven-ET-oh-klax)
Medically reviewed by Drugs.com. Last updated on Sep 20, 2020.
Commonly used brand name(s)
In the U.S.
Available Dosage Forms:
Therapeutic Class: Antineoplastic Agent
Uses for venetoclax
Venetoclax is used alone or together with other medicines (eg, rituximab) to treat chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL), with or without 17p deletion, in patients who have received at least one previous treatment. It is also used together with obinutuzumab to treat previously untreated CLL or SLL.
Venetoclax is also used together with other medicines (eg, azacitidine, decitabine, low-dose cytarabine) to treat newly-diagnosed acute myeloid leukemia (AML) in adults 75 years of age and older or who have other medical conditions that prevent the use of standard chemotherapy.
Venetoclax is an antineoplastic agent (cancer medicine). It interferes with the growth of cancer cells, which are eventually destroyed by the body.
Venetoclax is available only with your doctor's prescription.
Before using venetoclax
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For venetoclax, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to venetoclax or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Appropriate studies have not been performed on the relationship of age to the effects of venetoclax in the pediatric population. Safety and efficacy have not been established.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of venetoclax in the elderly. Safety and efficacy have been established.
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Interactions with medicines
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking venetoclax, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using venetoclax with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
Using venetoclax with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Dabigatran Etexilate
- Doxorubicin Hydrochloride Liposome
- St John's Wort
Using venetoclax with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Interactions with food/tobacco/alcohol
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using venetoclax with any of the following is usually not recommended, but may be unavoidable in some cases. If used together, your doctor may change the dose or how often you use venetoclax, or give you special instructions about the use of food, alcohol, or tobacco.
- Bitter Orange
- Grapefruit Juice
Other medical problems
The presence of other medical problems may affect the use of venetoclax. Make sure you tell your doctor if you have any other medical problems, especially:
- Gout or
- Hyperuricemia (high uric acid in the blood), history of or
- Kidney disease—Use with caution. May make these conditions worse.
- Infection—May decrease your body's ability to fight an infection.
- Liver disease, severe—Use with caution. The effects may be increased because of slower removal of the medicine from the body.
Proper use of venetoclax
Take venetoclax exactly as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. Do not change your dose or stop using venetoclax without first asking your doctor.
Venetoclax comes with a Medication Guide. Read and follow these instructions carefully. Ask your doctor if you have any questions.
Take venetoclax with food and water at the same time each day. Swallow the tablet whole. Do not break, crush, or chew it.
Drink plenty of water each day to help prevent an unwanted effect called tumor lysis syndrome.
Do not eat or drink grapefruit products, starfruit, or Seville oranges with venetoclax.
The dose of venetoclax will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of venetoclax. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
- For oral dosage form (tablets):
- For acute myeloid leukemia:
- Adults—At first, 100 milligrams (mg) once a day. Your doctor will gradually increase your dose each week. However, the dose is usually not more than 400 mg per day when given with azacitidine or decitabine or not more than 600 mg per day when given with low-dose cytarabine.
- Children—Use and dose must be determined by your doctor.
- For chronic lymphocytic leukemia or small lymphocytic lymphoma:
- Adults—At first, 20 milligrams (mg) once a day. Your doctor will gradually increase your dose each week for 5 weeks (ramp-up). However, the dose is usually not more than 400 mg per day.
- Children—Use and dose must be determined by your doctor.
- For acute myeloid leukemia:
If you miss a dose of venetoclax, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
If you miss a dose and it is 8 hours or less after your normal time, take it as soon as you can and continue with your regular schedule. If it is more than 8 hours after your normal time, skip the missed dose and return to your regular dosing schedule.
If you vomit after taking a dose, do not take an extra dose. Take the next dose at the usual time the following day.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep the tablets in the original package during the first 4 weeks of treatment. Do not transfer the medicine to a pillbox or another container.
Precautions while using venetoclax
It is very important that your doctor check your progress at regular visits while you are using venetoclax. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. Blood and urine tests may be needed to check for unwanted effects.
Using venetoclax while you are pregnant can harm your unborn baby. Women must have a negative pregnancy test before starting venetoclax. Use an effective form of birth control during treatment and for at least 30 days after the last dose to prevent pregnancy. If you think you have become pregnant while using venetoclax, tell your doctor right away.
Do not use venetoclax together with clarithromycin, conivaptan, indinavir, itraconazole, ketoconazole, lopinavir, posaconazole, ritonavir, telaprevir, and voriconazole. Using these medicines together may cause serious unwanted effects.
Venetoclax may cause a serious type of reaction called tumor lysis syndrome. Your doctor may give you a medicine to help prevent this. Call your doctor right away if you have a decrease or change in urine amount, joint pain, stiffness, or swelling, lower back, side, or stomach pain, a rapid weight gain, swelling of the feet or lower legs, or unusual tiredness or weakness.
Venetoclax may cause serious infections, including pneumonia (lung infection) and sepsis (blood infection), which can be life-threatening. Check with your doctor if you have symptoms of an infection such as a fever, chills, body aches, or sore throat. Venetoclax may decrease the amount of white blood cells in the blood. White blood cells help your immune system fight infections. Avoid being near people who are sick or have infections. Wash your hands often. Stay away from rough sports or other situations where you could be bruised, cut, or injured.
While you are being treated with venetoclax, and after you stop treatment with it, do not have any immunizations (vaccines) without your doctor's approval. Venetoclax may lower your body's resistance and the vaccine may not work as well or you might get the infection the vaccine is meant to prevent. In addition, you should not be around other persons living in your household who receive live virus vaccines because there is a chance they could pass the virus on to you. Some examples of live vaccines include measles, mumps, influenza (nasal flu vaccine), poliovirus (oral form), rotavirus, and rubella. Do not get close to them and do not stay in the same room with them for very long. If you have questions about this, talk to your doctor.
Talk with your doctor before using venetoclax if you plan to have children. Some men who use venetoclax may become infertile (unable to have children).
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (eg, St. John's wort) or vitamin supplements.
Venetoclax side effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
- Black, tarry stools
- bladder pain
- bleeding gums
- bloating or swelling of the face, arms, hands, lower legs, or feet
- blood in the urine or stools
- blurred vision
- body aches or pain
- bone pain
- chest pain or tightness
- cloudy urine
- coughing up blood
- decreased urine
- difficult, burning, or painful urination
- difficulty in breathing or swallowing
- difficulty in moving
- dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
- dry mouth
- frequent urge to urinate
- increased menstrual flow or vaginal bleeding
- increased thirst
- itching, pain, redness, swelling, tenderness, or warmth on the skin
- joint pain, stiffness, or swelling
- loss of appetite
- lower back or side pain
- mood or mental changes
- muscle cramps, pains, or stiffness
- muscle spasms (tetany) or twitching seizures
- numbness or tingling in the hands, feet, or lips
- pale skin
- pinpoint red spots on the skin
- pounding in the ears
- prolonged bleeding from cuts
- rapid weight gain
- rapid, shallow breathing
- red or black, tarry stools
- red or dark brown urine
- slow, fast, or irregular heartbeat
- sore throat
- tingling of the hands or feet
- unusual bleeding or bruising
- unusual tiredness or weakness
- unusual weight gain or loss
- yellow eyes or skin
- holding false beliefs that cannot be changed by fact
- seeing, hearing, or feeling things that are not there
- unusual excitement, nervousness, or restlessness
Incidence not known
- Ear congestion
- runny or stuffy nose
- stomach pain
- ulcers, sores, or white spots in the mouth
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
- Back pain
- decreased appetite
- difficulty having a bowel movement
- mouth or throat pain
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Frequently asked questions
- How long do you take Venclexta for?
- Is Venclexta (venetoclax) chemotherapy?
- How effective is Venclexta?
- How is Venclexta (venetoclax) used for AML?
- Can Venclexta be used for Multiple Myeloma?
- How does Venclexta work?
More about venetoclax
- Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Interactions
- En Español
- 1 Review
- Drug class: miscellaneous antineoplastics
- FDA Alerts (1)
- Other brands
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