I would see the specialist as soon as possible. Call your specialist and tell them exactly what you have, including the blister part. The skin reactions can potentially be severe and they need immediate attention.
"red, swollen, blistered, or peeling skin" is in the alerts for seeking medical attention right away. (see below)
http://www.drugs.com/sfx/ribavirin-side-effects.html
"Ribavirin"
"Seek medical attention right away if any of these SEVERE side effects occur when using Ribavirin:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue; unusual hoarseness; wheezing); bloating of the stomach; changes in hearing, taste, or vision; chest pain; confusion; dark, tarry, or bloody stools; dark urine; decrease in the amount of urine; fainting; fever, chills, or sore throat; hearing loss; irregular heartbeat; menstrual problems; mood or mental problems (eg, agitation, aggression, anger, anxiety, decreased concentration, depression, irritability, memory problems, nervousness); muscle pain or weakness; numbness of an arm or leg; pale stools; persistent loss of appetite; rapid breathing; rash with blisters or sores in your mouth, nose, or eyes; red, swollen, blistered, or peeling skin; severe or persistent diarrhea, nausea, or vomiting; severe or persistent headache or dizziness; severe stomach or back pain; shortness of breath; suicidal thoughts or actions; unusual bruising or bleeding; unusual or severe tiredness, weakness, or fatigue; vomit that looks like coffee grounds; weight loss; worsening psoriasis; yellowing of the eyes or skin."
Yes, you need to talk to your doctor. I had severe rash and needed treatment from a dermatologist. I did get the peeling skin between my fingers later on when the rash was under control. I think some of it is from the dehydtating effect of the meds. I used Amlactin on my hands a few times a day and it cleared up. Good luck.
Thanks, yes I suppose I'll have to go back in as soon as they can see me. Other than this issue I really have not had problems.
For any who may have been curious, I did not go back to the doctor about the blisters, and they cleared up on their own. Apparently it was just poison ivy, since I had been pulling some weeds about the same time as starting treatment. That or the Lord looks after fools!