insomnia
"First two days taking 50mg. First day taking I took relatively earlier so it would have time to kick in, without leaving me groggy, I felt it within a hour, and it increased by libido!! After two hours the drowsiness wore off, however I felt great and took a third of another to boost me back in a sedated sleep.  Normally I have extremely long lasting visual dreams, but I never felt energized like I've slept. This first morning I couldn't recall having a single dream and woke up relatively early, sleeping 8 hours. My side effects were feeling lightly hungover and numb until standing.  Yes I couldn't breath out of my nose and yes my mouth became dry no matter the amount of water. 2nd night bad headache no sleep. Will try 25mg tomorrow. Not looking promising"