I googled 'valtrex, oral herpes' and found a bunch of websites that say valtrex can be used for both genital and oral herpes. Keep in mind that there is no cure for herpes ... Valtrex (and other drugs like it) are used to reduce the symptoms and prevent outbreaks.
You'll have to see your doctor for a diagnosis and a prescription though.
(Also remember that just because you do not have a sore does not mean you are not contagious; safer sex practices are still key)
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