I want a nose job - but am afraid of general anesthesia because of Ritalin. Is general anesthesia w/o muscle relaxants possible?

Hello and thank you for your question. In my practice, I use general anesthesia for my rhinoplasty patients.  This is performed by a board-certified MD anesthesiologist.  It is extremely safe when performed in this manner.  Your questions would be most accurately addressed by your anesthesiologist.  
Make sure you specifically look at before and after pictures of
real patients who have had this surgery performed by your surgeon and evaluate
their results.  The most important aspect is to find a surgeon you are
comfortable with. I recommend that you seek consultation with a qualified
board-certified plastic surgeon who can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

General anesthesia is very safe today when performed by a board certified physician anesthesiologist.  We did not perform IV sedation for rhinoplasty.  It is important not to have conscious awareness of the procedure and have a controlled airway so that blood does not go down the back of the throat and into the lungs.  For more information and many  before and after examples, please see the link and the video below 

Personally, I have had no issues with patients on Ritalin and anesthesia.  This question, however, is best answered by an anesthesiologist.  I recommend voicing your concerns with your rhinoplasty surgeon.  Their office can likely arrange for you to meet the anesthesiologist prior to surgery.  Best of luck!