Why am I taking Valtrex for canker sores? Is that a common prescribed medicine for canker sores? And are canker sores and herpes the same. The medical term for canker sore is aphthous ulcer. There are medications ( acyclovir and valacyclovir) that can be used as creams or pills to. This is particularly important for canker sores (recurrent aphthous stomatitis / RAS / aphthae), since several other conditions can cause ulcers in the mouth that. All herpes infections, whether type 1 or genital type 2, are transmissible from person to person. Zinc oxide ointment used after crusts https://annandalemedicalgroup.com/valtrex-500mg.html formed. Recurrent aphthous stomatitis. Salinas TJ expert opinion. Lesions first appear 12 to 36 hours after the initial symptoms. Subscribe Jobs. Most lesions can be diagnosed based on clinical appearance and history. HSV is very common. There are five different stages of a cold sore. But, since I suffer from canker sores myself, I decided to give it a try.