Could this be a side effect of the Percocet? My doctor has been checking me out for a possible blood clot in the lungs or heart. Everything checked out okay, and no one mentioned to me that it could be the Percocet. However, I was able to get the ER doctor to prescribe Albuterol for me, just in case I started wheezing again. Which I did about an hour ago. It's 3:15 a.m. and I'm scared to lie back down! The Albuterol has helped some. I'm 65 and have begun having some breathing problems over the past few years. Just had a lumbar laminectomy four days ago and this is why I was prescribed the Percocet (for pain). This wheezing is so strange!