hi mewkiss! i've been on very high dose acyclovir - long term, over 6 years. (im a very virally subset!, dxd ME, fluctuating moderate to severe, housebound/bedbound - 45 yrs)
i was totally bedbound - severely ill, for some years prior to acyclovir. in my case it has helped me to improve in some areas..i probably couldnt survive without it (at the very least id be in (and out! - and in!) of hospitals, so i'm told). but i'll admit it took a long time to see those improvements.
(my biggest improvements (cognitive/memory) came during part of my 10 months on the ARV 'epivir'...but that didnt work out, unfortunately)
we are all so different in how we react to meds and protocols. (if you use acyclovir, make sure you hydrate MORE than you think you need to! and have your kidney function tested regularly)
(my husband is having some "success" with the chinese herb 'equilibrant' - an immune modulator (similar in that it contains 'sophora root'....but not as difficult to tolerate as 'oxymatrine").
....his ME has stabilized and is no longer spiraling downward! not moving forward much - but not going backwards either...which he had been doing. we are set to add inosine to the mix and see what happens)
if you ever choose to experiment with an immune modulator such as equilibrant - be sure and start very slowly! chinese herbs CAN have powerful, unexpected side effects)
good luck with your decision!

jackie (btw, wildaisy set up a poll for various treatments here)