Does Acyclovir 400mg Thrice A Day Cause Lightheadedness And Dizziness?

Can Acyclovir 400mg tablet 3 times a day cause be to be light headed and even dizzy? This light headedness and dizziness started when I started taking the medication for my fever blisters. I am a nearly 70 year old woman and not very tall (4'10'' tall) and somewhat overwieght.