Do not take this medication with any of the following:
-Live virus vaccines
This medication may also interact with the following:
-Certain antivirals for HIV or hepatitis
-Medications that lower your chance of fighting infection
Other medications may affect the way this medication works. Talk with your care team about all of the medications you take. They may suggest changes to your treatment plan to lower the risk of side effects and to make sure your medications work as intended.

They need to know if you have any of these conditions:
-Cancer
-Heart failure
-HIV or AIDs
-Immune system problems
-Infection, such as tuberculosis (TB) or other bacterial, fungal, or viral infections
-Kidney disease
-Liver disease
-Recent or upcoming vaccine
-An unusual or allergic reaction to cladribine, other medications, foods, dyes, or preservatives
-If you or your partner are pregnant or trying to get pregnant
-Breastfeeding

Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse.
You may need blood work done while you are taking this medication.
Talk to your care team about your risk of cancer. You may be more at risk for certain types of cancer if you take this medication.
This medication may increase your risk of getting an infection. Call your care team for advice if you get a fever, chills, sore throat, or other symptoms of a cold or flu. Do not treat yourself. Try to avoid being around people who are sick.
Talk to your care team if you or your partner may be pregnant. Serious birth defects can occur if you take this medication during pregnancy and for 6 months after the last dose. You will need a negative pregnancy test before starting this medication. Contraception is recommended while taking this medication and for 6 months after the last dose. Your care team can help you find the option that works for you.
If your partner can get pregnant, use a condom during sex while taking this medication and for 6 months after the last dose.
Do not breastfeed while taking this medication and for 10 days after the last dose.

Keep out of the reach of children and pets.
Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F). Keep this medication in the original container. Protect from moisture. Keep the container tightly closed. Get rid of any unused medication after the expiration date.
To get rid of medications that are no longer needed or have expired:
-Take the medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location.
-If you cannot return the medication, ask your pharmacist or care team how to get rid of this medication safely.