Sofosbuvir has only been approved by the FDA for Hep C since Christmas and normally a treatment lasts a maximum of 24 weeks so theres not a lot of official side effects knocking around.
Patients taking new drugs have the disadvantage of not having time to build up a history of side effects, but side effects in the phase 2 trials where mostly nausea,insomnia and fatigue, which you are going to get with any liver drugs.
Supposed to have success rates in the 90% range in Phase 2 trials.
Expensive- $28k/month so a course of treatment could cost anything up to $148k
https://www.hepmag.com/articles/Soval...01_24907.shtml