So far I've been on takuna for about 12 days. It's very hard to get, with the only source being a liquid nonstandardized product from Nutramedix. When I added Takuna to my other herb regimen I noticed a definite anti viral effect, head ulcers cleared up about 80% and there were no side effects. My MD approved trying valcyclovir after I showed her research showing that many EBV patients are infected but have false negative findings on testing, which was her main reason for not wanting to do it. I decided to do it for two reasons. The head lesions hadn't fully cleared. Combination therapy is often recommended when treating infections. After only one dose of valcyclovir I have one of their not serious side effects, nausea, which stinks, however perhaps after a few days my body will adjust and it will get better.