Hi, Valtrex is an anti-viral drug used to treat viral infections, in your case Shingles. In fact, Shingles is caused by a virus which enters the herpes group called herpes zoster . This explains why you are taking it. With regards to the symptoms you are mentioning, they are related to such viral infection. They will be reversed by time. I would suggest to get some rest, get plenty of water, keep proper hygiene. Please keep in mind that Shingles is very contagious, so be careful when in contact with others (especially children) and with clothing. Hope it helped!