Do not take this medicine with any of the following medications:

-live virus vaccines

This medicine may also interact with the following medications:

-birth control pills
-certain antivirals for HIV or hepatitis
-cilostazol
-curcumin
-cyclosporine
-dilazep
-dipyridamole
-eltrombopag
-medicines that lower your chance of fighting infection
-nifedipine
-nimodipine
-reserpine
-ribavirin
-rifampicin
-St. John''s Wort
-steroid medicines like prednisone or cortisone
-sulindac

They need to know if you have any of these conditions:

-cancer
-HIV or AIDS
-immune system problems
-infection (especially a viral infection such as chickenpox, cold sores, or herpes)
-kidney disease
-liver disease
-low blood counts, like white cells, platelets, or red blood cells
-recently received or scheduled to receive a vaccine
-an unusual or allergic reaction to cladribine, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Visit your healthcare professional for regular checks on your progress. Tell your healthcare professional 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 medicine.

This medicine may increase your risk of getting an infection. Call your healthcare professional for advice if you get a fever, chills, or sore throat, or other symptoms of a cold or flu. Do not treat yourself. Try to avoid being around people who are sick. Call your healthcare professional if you are around anyone with measles, chickenpox, or if you develop blisters that do not heal properly.

In some patients, this medicine may cause a serious brain infection that may cause death. If you have any problems seeing, thinking, speaking, walking, or standing, tell your healthcare professional right away. If you cannot reach your healthcare professional, urgently seek other source of medical care.

Talk with your doctor if you have not had chickenpox or the vaccine for chickenpox.

This medicine can decrease the response to a vaccine. If you need to get vaccinated, tell your healthcare professional if you have received this medicine within the last 4 weeks. Extra booster doses may be needed. Talk to your healthcare professional to see if a different vaccination schedule is needed.

Talk to your healthcare professional about your risk of cancer. You may be more at risk for certain types of cancer if you take this medicine.

Do not become pregnant while taking this medicine or for 6 months after stopping it. Women should inform their healthcare professional if they wish to become pregnant or think they might be pregnant. Men should not father a child while taking this medicine and for 6 months after stopping it. There is potential for serious side effects to an unborn child. Talk to your healthcare professional for more information.

Keep out of the reach of children.

Store between 20 and 25 degrees C (68 and 77 degrees F). Keep this medicine in the original container. Throw away any unused medicine after the expiration date.