Carolanne: It may take 3 weeks, it may take 6 weeks. I saw no results for a year and it was no more cold sores, colds, flu, or allergies. It never made any difference on my vestibular symptoms, except it kept the virus from doing more brain nerve damage ... a real plus for me. My wife caught hers early and lost all symptoms in 1 week and stays on daily life acyclovir and has had only tinnitus try and start, but it was stopped within 3 days after upping acyclovir for 10 days, then back to daily dose and all is well no more reoccurances now over a year. She refuses to ever give up her acyclovir. Any doctor denying her acyclovir, better sleep with one eye open ... and hope she doesn't approach from the side of the closed eye. deadeye: As Larry says all you have to lose is your symptoms. And I add a few bucks a good gamble in anyones book. Sure wish I had know 10 years ago. Linda: You are right, it won't help unless virus is the cause and then one may not notice any difference if permanant nerve damage has occurred. This is why I advocate finding the cause and banishing the old Meniere's label forever. You can't treat it if you ain't got it and you can't treat it if you don't know you have it. Good point worth mentioning. Finding the cause is what diagnosis is about. Sometimes it can't be found so experiementing has too occur.