Hepatitis C: An In-Depth Guide

Lowered platelet count (thrombocytopenia)

Platelets are cells containing proteins that help clot blood. They have a role in stopping bleeding. Having a low platelet count is called thrombocytopenia. When severe, this condition increases the risk for bruising and bleeding. This condition may be very serious in those with bleeding disorders.


A lowered platelet count is a side effect of peg-interferon. Also, research studies have found a link between the amount of scarring on the liver and thrombocytopenia.


  • If you vomit blood or have runny, black bowel movements, see your doctor immediately for treatment.


See your healthcare provider regularly to get a blood test called a complete blood count (CBC), which measures red cells, white cells and platelets.