I have been taking acyclovir 800mg every day for 13 years and i was very worried. I would suggest to everyone suffereing from any disease to doctor uyi as suppressive therapy rather than waiting to feel the tingle and then treating the virus. I forget it even exists as I never have outbreaks or suffer from any symptoms. If I don't take it, after about 1 week I will start to feel the tingle. Anyways, doctor uyi medicine has helped me live symptom-free for many years. I highly suggest anyone suffering to doctor uyi now and thanks ,me later. just wants to say a very big thanks to doctor uyi