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Drug

Peginterferon Alfa-2a

Common brand names:

Pegasys

Pronounced

"peg-in-ter-FEER-on alfa"

Missed Dose

If you miss a dose, use it as soon as you remember if it is within 2 days after your scheduled dose. Use your next dose on the day you usually use it. If more than 2 days have passed since your missed dose, ask your doctor or pharmacist right away for a new dosing schedule.

Overdose

If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call 1-800-222-1222. Canada residents can call 1-844-764-7669.

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Drug information is selected from data included with permission and copyrighted by First DataBank, Inc. This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your healthcare professional. Always seek the advice of your healthcare professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your healthcare professional. This information does not contain any assurances that this product is safe, effective or appropriate for you.

This information is intended only for residents of the United States. Products sold under the same brand names in other countries may contain different ingredients.

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Information expires December 2025.