A girl says she takes a prescription med for cold sores she gets in mouth. I thought meds are for genital herpes? Why would she take for hsv1?

To relieve symptoms. Hsv1 occurs as oral herpes and is also called herpes labialis. Cold sores are as a result of hsv1 and can be extremely uncomfortable if they are allowed to run their course. Medications given for control of the symptoms for blisters and painful mouth conditions help tremendously and are similar to the medications for controlling hsv2 which is found in genital herpes.
Meds cover both. Valtrex (valacyclovir) and acycolvir are both medications for herpes...And both can treat herpes 1 or 2. Herpes is a family of viruses and these meds treat most members of the family and hsv1 and 2 are the most common. Other herpetic viruses include mono (epstein barr) and chickenpox as well as human papilloma virus.).
Prevention. For patients with multiple outbreaks of oral herpes, they are sometimes placed on antiviral medicine to reduce the frequency, intensity and duration of their outbreaks.
Used for HSV-1. Hsv-1 usually affects the distribution of the trigeminal ganglion, the face, upper and lower lip, and sometimes the eyes. Patients who have severe recurring episodes of hsv-1 are often prescribed some of the same antiviral agents used for hsv-2, often referred to as genital herpes.