Can I receive Restalyn if I'm taking Prednisone for a recent allergic reaction to an antibiotic I was taking for pneumonia?

You should be fine to get a Restylane treatment done while on Prednisone.  It may even help with some of the swelling afterwards.  However, it is always important to consult with your doctor and disclose all medications you are taking before having a procedure done. 

There should be no problem with using Restylane while on prednisone. In fact, the prednisone will make you less likely to have swelling the next day. Hope your pneumonia is doing better.