Why does valtrex cause headaches:
Valtrex is an anti-viral drug that is believed to suppress the herpes virus reproduces itself and spreads to other cells in the body. How well Valaciclovir will work if you take it more than 24 hours after the start of signs or symptoms. It can be a great treatment option for you because it can help reduce the number of incidences. Your doctor will explain to you how to take the drug based on the reason it is prescribed. If taken soon enough.