If I'm not mistaken, Hep C is mostly transmitted through contact with blood, so that would be infected only if you come into contact with his blood. If it were me, I would visit him and not share personal care items with him which would be the most likeliest route of transmission (razor,
I've been on Remicade, Humira and Imuran and have never felt my relationships with friends who have HIV or Hepatitis to be in any way compromised. I've not worn gloves or brought anything from home to use for myself---I've just been cautious not to share drinks/cutlery that they're using. But then again, I don't share drinks/food off the same cutlery with anyone, regardless of whether I know of their medical history or not.