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GENERIC NAME TRADE NAME TYPICAL DOSAGE Interferon alfa 2a Roferon 3-5 million units SQ 3 times weekly Interferon alfa 2b Intron 3 million units SQ 3 times weekly Interferon Alfacon-1 Infergen 9 micrograms SQ 3 times weekly Interferon alfa 2b + ribavirin Rebetron Interferon: 3 million units SQ three times weekly; ribavirin: 1000-1200 mg orally daily Pegylated interferon alfa 2a* Pegasys 180 micrograms SQ weekly Pegylated interferon alfa 2b PEG-Intron 1-1.5 micrograms/kg SQ weekly Ribavirin Rebetol 800-1200 mg orally daily

*Not licensed by the FDA in the U.S., but available in Europe. SQ = subcutaneously