Hi.
Accutane works by shrinking the sebaceous (oil) glands
in the skin. They grow back very slowly, by which time the patient has nearly always outgrown their tendency for acne. Accutane can also affect hair, lips, eyes, nose and vagina. Skin can be fragile for up to 6 months after finishing Accutane. However, it is very unusual to still be experiencing vaginal dryness after a year.
Have you changed anything else, method of birth control for example?