Is it safe to get Ulthera on Accutane?

I would wait six months after Accutane before doing Ultherapy although there is no proven cause and effect of scarring with epidermal resurfacing (where the risk for scarring is greater from a lack of reepithelialization after Accutane). The Ultherapy targets the deep dermal collagen which may not be subject to poor healing from Accutane.

I think it would be very unwise to have Ultherapy while on Accutane.  Although the depth of treatment with Ulthera is usually in the layer below the skin, it is not reasonable to take unnecessary risks. 

Ultherapy should be avoided for 6 months after Accutane is discontinued. The population of patients that have acne (younger in general) and those that sign up for Ultherapy (a little older) don't cross over much. Read the Ultherapy ebook provided on the link below. 

It is well known that patients on accutane can have poor wound healing, therefore I do not recommend while you are on accutane and have an uthera procedure done. This is a precaution.