dear mr. wright

my husband has been on interferon peg treatments for a year now it has been awful in the last couple months he has had one eye swelling and getting real sore looking then it goes away well he took a treatment sat. night and has been in bed for three days now and both his eyes are almost swollen shut. and looks like somone hit him in both of them. they are purple and black and blue can you tell me if this is a side effect of the interferon

thank you
rita