I am just on the oral dose at 25 a day, not sure how this compares to what you are getting. I do not get tired from it ever, though. You might mention to your pdoc what is going on and see what she says. If it continues, there are also other options, like adding something like Adderall or Provigil during the day to help you stay awake. Both have worked ror me when I was tired from other things.