Ixazomid

Ixazomib is a prescription medication used to treat multiple myeloma, a form of blood cancer, who have received at least one prior therapy.

Ixazomib belongs to a group of drugs called proteasome inhibitors. These medications work by inhibiting the function of proteasomes, cellular complexes required to break down damaged or unneeded proteins inside cells, including cancer cells. The buildup of proteins causes cells to die, potentially slowing the progression of cancer.

Ixazomib comes in capsule form. It is taken on an empty stomach, once a week. It should be taken on the same day of the week for the first 3 weeks of each 4 week cycle. Direct contact with the capsule contents should be avoided.

Common side effects include diarrhea, constipation, and low blood platelet count.

Ixazomib is a prescription medication used to treat multiple myeloma, a form of blood cancer, who have received at least one prior therapy.

It has been approved to be used with another FDA-approved treatment for multiple myeloma called Revlimid (lenalidomide) and dexamethasone (a type of corticosteroid).

This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.

Ixazomib is dosed in combination with Revlimid (lenalidomide) and dexamethasone.

The recommended starting dose of ixazomib is 4 mg administered orally once a week on Days 1, 8, and 15 of a 28-day treatment cycle.

The recommended starting dose of Revlimid (lenalidomide) is 25 mg administered daily on Days 1 through 21 of a 28-day treatment cycle.

The recommended starting dose of dexamethasone is 40 mg administered on Days 1, 8, 15, and 22 of a 28-day treatment cycle. 

The dosage may be reduced with neutropenia, hepatic impairment or renal impairment.

Ixazomib may cause serious side effects, including:

• Low platelet counts (thrombocytopenia). Low platelet counts are common with ixazomib, and can sometimes be serious. You may need platelet transfusions if your counts are too low. Tell your healthcare provider if you have any signs of low platelet counts, including bleeding and easy bruising.
• Stomach and intestinal (gastrointestinal) problems. Diarrhea, constipation, nausea, and vomiting are common with ixazomib, and can sometimes be severe. Call your healthcare provider if you get any of these symptoms and they do not go away during treatment with ixazomib. Your healthcare provider may prescribe medicine to help treat your symptoms.
• Nerve problems. Nerve problems are common with ixazomib and may also be severe. Tell your healthcare provider if you get any new or worsening symptoms, including:
  • tingling
  • numbness
  • pain
  • a burning feeling in your feet or hands 
  • weakness in your arms or legs
• Swelling. Swelling is common with ixazomib and can sometimes be severe. Tell your healthcare provider if you develop swelling in your arms, hands, legs, ankles, or feet, or if you gain weight from swelling.
• Skin reactions. Tell your healthcare provider if you get a new or worsening rash.
• Liver problems. Tell your healthcare provider if you get these signs of a liver problem:
  • yellowing of your skin or the whites of your eyes
  • pain in your right upper stomach-area Back pain is also common with ixazomib.

These are not all the possible side effects of ixazomib. Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088. 

Serious side effects have been reported. See "Ixazomib Precautions" section.

Common side effects include:

• diarrhea
• constipation
• low blood platelet count (thrombocytopenia)
• peripheral neuropathy (numbness and pain from nerve damage, usually in the hands and feet)
• nausea
• peripheral edema (fluid under the skin causing swelling)
• vomiting
• back pain

These are not all the possible side effects of ixazomib. For more information, ask your healthcare provider or pharmacist.

Tell your healthcare provider if you have any side effect that bothers you or that does not go away. 

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA­-1088. 

Tell your doctor about all the medicines you take including prescription and non-prescription medicines, vitamins and herbal supplements. Especially tell your doctor if you take:

• strong CYP3A inducers such as rifampin, phenytoin, carbamazepine, and St. John’s Wort.

​This is not a complete list of ixazomib drug interactions. Ask your doctor or pharmacist for more information.

Ixazomib can cause harm to the unborn baby when administered to a pregnant woman. There are no human data available regarding the potential effect of ixazomib on pregnancy or development of the embryo or fetus. Ixazomib caused embryo-fetal toxicity in pregnant rats and rabbits at doses resulting in exposures that were slightly higher then those observed in patients receiving the recommended dose.

• Tell your healthcare provider if you are pregnant or plan to become pregnant. Ixazomib can harm your unborn baby. 
• Avoid becoming pregnant during treatment with ixazomib. 
• Females who are able to become pregnant must use effective birth control during treatment and for 90 days after your final dose of ixazomib. 
• Males with a female partner who is able to become pregnant must use effective birth control during treatment and for 90 days after your final dose of ixazomib. 
• Talk to your healthcare provider about birth control methods that may be right for you. 
• Tell your healthcare provider right away if you or your partner become pregnant while you are receiving ixazomib.

Tell your healthcare provider if you are breastfeeding or plan to breastfeed. It is not known if this medication passes into breast milk. Do not breastfeed during treatment with ixazomib.