Read the Patient Information Leaflet and Instructions for Use if available from your pharmacist before you start using filgrastim and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

Depending on your filgrastim product, this medication is injected under the skin or into a vein. Use as directed by your doctor, usually once a day. The dosage and length of treatment are based on your medical condition, weight, lab tests, and response to treatment.

If you are using this medication at home, learn all preparation and usage instructions from your health care professional and the product package. Take the medication out of the refrigerator at least 30 minutes before you inject it to allow it to reach room temperature. Do not shake the medication. Before using, check this product for particles or discoloration. If either is present, do not use the liquid. If you are injecting this drug under the skin, first clean the skin you are going to inject into (the injection site) with rubbing alcohol. Change the injection site each time to lessen injury under the skin. Do not inject into skin that is bruised, tender, red, hard, or that has scars or stretch marks. To lessen bruising, do not rub the injection site after a shot. Learn how to store and discard medical supplies safely.

Use this medication regularly to get the most benefit from it. To help you remember, use it at the same time each day.

Do not increase your dose or use this drug more often or for longer than prescribed. Your condition will not improve any faster, and your risk of side effects will increase.

If you are receiving cancer chemotherapy, you should not use this medication within 24 hours before or 24 hours after chemotherapy. Ask your doctor for specific directions about when to use this medication.