for Health Care Providers
| TREATMENT | RECOMMENDED DOSE |
|---|---|
| Clcr = creatinine clearance; IFN = interferon; PO = orally; SC = subcutaneous; U = units. | |
| Combination Peginterferon Alfa Regimens with Ribavirin | |
| Peginterferon alfa-2a (Pegasys®) | 180 mcg SC once weekly regardless of weight |
| Peginterferon alfa-2b (PEG-Intron®) | 1.5 mcg/kg SC once weekly up to 150 mcg/week |
| Ribavirin (Rebetol®, Copegus®) | Genotype 1: 1,000 mg ≤75 kg OR 1,200 mg if >75 kg PO daily (in two divided doses) Genotype 2 and 3: 800 mg PO daily (in two divided doses) |
| Regimens in Certain Clinical Circumstances | |
| Peginterferon alfa-2a (Pegasys®) in hemodialysis | 135 mcg SC once weekly |
| Peginterferon alfa-2b (Peg-Intron®) in renal dysfunction | Reduce dose by 25% if Clcr 30-50 mL/min Reduce dose by 50% if Clcr 10-29 mL/min |
| Peginterferon alfa-2a (Pegasys®) monotherapy | 180 mcg SC once weekly regardless of weight |
| Peginterferon alfa-2b (PEG-Intron®) monotherapy | 1.0 mcg/kg SC once weekly up to 150 mcg/week |
| IFN alfa-2a (Roferon-A®) | 3 million U SC three times weekly |
| IFN alfa-2b (Intron A®) | 3 million U SC three times weekly |
| IFN alfacon-1 (Infergen®) also known as consensus IFN | 9 mcg SC three times weekly 15 mcg SC three times weekly in IFN nonresponders |
| Ribavirin dose with IFN | 1,000 mg PO daily if patient ≤75 kg (in two divided doses) OR 1,200 mg PO daily if patient >75 kg (in two divided doses) |

