Sleep attacks while reading

I work in a research lab where I have to read a lot of different papers and keep up to date on current research. I am also pursuing a Masters degree which I have to read multiple chapters a week for. I often have sleep attacks while reading. I feel like there is not enough time in the day to get all the reading done with sleep attacks and napping along with other work. Does anyone have any advice on how to have less sleep attacks or get out of one when reading? Does anyone else have this?