Common Riba sides:
Nausea, vomiting, headache, dizziness, stomach upset
, trouble sleeping, and flu-like symptoms (e.g., fever, chills, sore throat, muscle aches). Hair loss, loss of appetite, weight loss, rash, itching, changes in taste or hearing. Tiredness and weakness (fatigue), dark urine, yellowing eyes, mental/mood changes , trouble breathing.
Actually, if you look at the Pegasys Website it will give you pretty much the same sx's for Interferon: http://www.pegasys.