Especially tell your doctor if you take the anti-hepatitis B medicine telbivudine (Tyzeka). See "What are the possible side effects of INTRON A?"

Know the medicines you take. Keep a list of them and show it to your healthcare provider and pharmacist when you get a new medicine.

How should I take INTRON® A?

To get the most benefit from this medicine, it is important that you take INTRON A exactly as your healthcare provider tells you. Your healthcare provider will decide your dose of INTRON A and how often you will take it. Do not take more than your prescribed dose. INTRON A is given as an injection either under the skin (subcutaneous) or into a muscle (intramuscular). You should be completely comfortable with how to prepare and measure your dose of INTRON A and how to inject yourself before you use INTRON A for the first time. Your healthcare provider will train you on how to use and inject INTRON A properly.

INTRON A comes in different strengths and different forms (a powder in a vial, a solution in a vial, and a multidose pen). Your healthcare provider will determine which form is best for you. The instructions for giving a dose of INTRON A are at the end of this leaflet.

If you miss a dose of INTRON A, take the missed dose as soon as possible during the same day or the next day, then continue on your regular dosing schedule. If several days go by after you miss a dose, check with your healthcare provider to see what to do. Do not double your next dose or take more than your prescribed dose without talking to your healthcare provider. Call your healthcare provider right away if you take more than your prescribed dose. Your healthcare provider may wish to examine you more closely and take blood for testing.

If you are taking INTRON A in combination with REBETOL®, you should also read the Medication Guide for REBETOL (ribavirin, USP) for more information about side effects and how to take REBETOL. REBETOL capsules should be taken twice a day with food. Taking REBETOL with food helps your body take up more of the medicine. Taking REBETOL at the same time of day every day will help keep the amount of medicine in your body at a steady level. This can help your healthcare provider decide how your treatment is working and how to change the number of REBETOL capsules you take if you have side effects. If you miss a dose of REBETOL, take the missed dose as soon as possible during the same day. If an entire day has passed, check with your healthcare provider about what to do. Do not double your next dose.

You must see your healthcare provider on a regular basis for blood tests so your healthcare provider can check how the treatment is working for you and to check for side effects.

Tell your healthcare provider if you are t