I was recently prescribed cephalexin pills for a pilonidal infection, at 500MG, 4 times a day for 10 days. I started taking it this morning, but I m a little unsure about how the dosage works. I m a little paranoid about taking it too often. I can t see being able to take the dose every 6 hours, otherwise one would be in the middle of the night, but I don t want to take all 4 doses within the 16 or so hours I m awake as that would only be every 4 hours. How often can I take each dose in a safe manner?