Cefazolin
"On Wednesday,  June 28 I had a surgical procedure where "CEFAZOLIN" was administered via IV. My reaction was "curse, swear, curse LOUDER" as it felt like FIRE coursing through my veins!" I also didn't know that taking the prescription for "CEPHALEXIN/750mg 2x/day" for a 5 day course would result in a HORRIBLE RASH -left arm/right arm/all across my upper back... 
I DIDN'T THINK this would happen, since I had been on [Cephalexin; similar drug @ a lower dose] it a few years ago.  
I believe it "could have been the IV ADMINISTRATION" of the [related] CEFAZOLIN. 
I am EXTREMELY UNCOMFORTABLE  dealing with this "ALLERGIC RASH REACTION" that came on within 24 hrs of finishing the course, (Not Uncommon.)
That's my review. EVERYTHING isn't FOR EVERYONE"