Welcome to the STD forum.
The direct answer to your opening question is yes, valacyclovir (valtrex
) sometimes can affect the hsv
blood test. However, probably not in the way you describe here. If someone has new hsv
-2, treatment with valacyclovir (or any of the other anti-hsv
drugs) can delay the conversion of the blood test from negative to positive. However, once the test is positive, treatment cannot make it negative again.
There is a good chance you do not have hsv
-2 at all -- i.e.