For cold sores, the typical Valtrex dosage for treating an outbreak is 2 grams taken twice a day for one day. This helps to reduce the severity and duration of symptoms.

When it comes to genital herpes sores, the standard Valtrex dose during an outbreak is 1 gram taken twice daily for ten days. It's important to follow your healthcare provider's recommendations closely regarding dosing and treatment duration.

Always consult with a healthcare professional before starting or changing any medication regimen related to herpes outbreaks. They can provide personalized guidance based on your specific situation and medical history.