High cholesterol is the presence of high levels of cholesterol in the blood. Familial means that is passed down through families and is a genetic disorder. The altered gene that causes familial high cholesterol is located on chromosome number 19. It contains the information for a protein called LDL receptor that is responsible to clear up LDL from the blood stream. Rarely, a person inherits the gene mutation from both parents, making them genetically homozygous. Individuals who are homozygous have a severe form of hypercholesterolemia, with heart attack and death often occurring before age 30. Below you may find medications used to treat or help with High Cholesterol, Familial Homozygous. More about High Cholesterol, Familial Homozygous