The risk of sexual transmission of hepatitis C in a stable, long-term monogamous relationship is low, and there is no need to change sexual practices. If your partner does have hepatitis C, you should consider getting tested.
If you don’t know someone’s sexual history then always use a condom. Only condoms can provide all-in-one protection against pregnancy and sexually transmitted infections such as HIV, hepatitis B and hepatitis C.
Ask your doctor or nurse for advice.