Can I have Botox and possibly filler if I have Wegener's granulomatosis?

I am interested in Botox and possibly filler. Before I scheduled I checked with the dermatologist’s office and they said they would ask and schedule if it was okay but I thought I would ask. I’ve been in “remission” since 2012 - I’m not on any medications, I only get Rituxan infusions about every 6 months. I also have subglottic stenosis from the Wegener's but that is managed with steroid injections into the airway. Thank you for your help!