For the treatment of recurrent infections, studies show that acyclovir, valacyclovir, and famciclovir have equal efficacy.

While most people tolerate the medication with no problems, a small percentage of people do experience side effects from daily antiviral therapy. These side effects are usually mild and include nausea, headache, nausea, stomach pain, cold, and sore throat.

Usually, these problems do not result in a person needing to stop the medication. To minimize side effects, try taking the medication with food. And be patient, most of the side effects are a nuisance, but do pass with each successive dose. However, if you find the side effects intolerable, talk to your doctor. Rarely people can experience seizures and people with kidney disease should take the drugs at lower doses and with caution. Talk to your doctor if you are concerned about taking herpes medications. He or she can help guide you to the best treatment for you.