De hyppigst forekommende bivirkninger ved PegIntron (set hos flere end 1 ud af 10 patienter) er vi - rusinfektion, vægttab, depression, irritabilitet, søvnbesvær, angst, nedsat koncentrationsevne, humør - svingninger, hovedpine, mundtørhed, dyspnø (vejrtrækningsbesvær), ondt i halsen, hoste, opkastning, kvalme, mavesmerter, diarré, appetitløshed, hårtab, kløe, tør hud, udslæt, muskelsmerter, ledsmerter, smerter i muskler og knogler, betændelse på injektionsstedet, reaktioner på injektionsstedet (smerte og rødme), svimmelhed, træthed, kulderystelser, feber, influenzalignende symptomer og kraftesløshed.
The most common side effects with PegIntron (seen in more than 1 patient in 10) are viral infection, weight loss, depression, irritability, insomnia (difficulty sleeping), anxiety, impaired concentration, emotional lability (mood swings), headache, dry mouth, dyspnoea (difficulty breathing), pharyngitis (sore throat), coughing, vomiting, nausea (feeling sick), abdominal (tummy) pain, diarrhoea, anorexia (loss of appetite), alopecia (hair loss), pruritus (itching), dry skin, rash, myalgia (muscle pain), arthralgia (joint pain), musculoskeletal pain (pain in the muscles and bones), inflammation at the site of the injection, injection site reaction (pain and redness), dizziness, fatigue (tiredness), rigors (shaking chills), fever, flu-like symptoms and asthenia (weakness).