Proper Use

Drug information provided by: Micromedex

A nurse or other trained health professional will give you this medicine. This medicine is given as a shot under your skin.

You may also be taught how to give this medicine at home. Make sure you understand all of the instructions before giving yourself an injection. Do not use more medicine or use it more often than your doctor tells you to.

Each package of interferon alfacon-1 contains a medication guide. Carefully read the guide and make sure you understand:

  • How to prepare the injection.
  • How to properly use a disposable syringe.
  • How to give yourself the injection.
  • How to store the vial of medicine.
  • How long the vial can be stored and used.

You will be shown the body areas where this shot can be given. Use a different body area each time you give yourself a shot. Keep track of where you give each shot to make sure you rotate body areas.

Use a new needle and syringe each time you inject your medicine.

To help clear up your infection completely, interferon alfacon-1 must be used for the full time of treatment, even if you begin to feel better after a few days or weeks. It is also very important that you receive your injection at the same time of day for each dose.

Use each vial (glass container) only one time. If the vial contains extra medicine, throw it away.

If you have any questions about any of this, check with your doctor.

Do not change to another brand of interferon without checking with your doctor first. Different types of interferon require different doses. If you refill your medicine and it looks different, check with your pharmacist.

If you have any questions about this information, check with your doctor.


The dose of this medicine 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 this medicine. 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 injection dosage form:
    • For hepatitis C:
      • For patients receiving interferon alfacon-1 only:
        • Adults—9 micrograms (mcg) injected under the skin three times per week. The injections should be spaced at least 48 hours apart.
        • Children—Use is not recommended.
      • For patients receiving interferon alfacon-1 together with ribavirin:
        • Adults—15 micrograms (mcg) injected under the skin once a day. It is taken together with 1000 to 1200 milligrams (mg) of ribavirin divided in two small doses per day.
        • Children—Use is not recommended.

Missed Dose

If you miss a dose of this medicine, 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.

After you take the missed dose, call your doctor for instructions.


Store in the refrigerator. Do not freeze.

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.

Allow this medicine to reach room temperature before using it. Do not shake the vial or expose it to direct sunlight.

Throw the used needles away in a hard, closed container that the needles cannot poke through. Keep this container away from children and pets.