After otoplasty, how long i have to wait before can drink coffee?

Please ask your surgeon about this as each has their own post-op care instructions. Some surgeons may recommend that you avoid coffee for a certain period of time as it can compromise recovery. 

There is no standard answer to this, so it is best to ask your PS.  Some studies report that caffeine after surgery is a benefit; others a detriment. If there is any concern about blood supply, you should probably limit your consumption.