Here’s a quick personal anecdote on Bromantane. I tried it for motivation and fatigue. Here’s what it’s supposed to do: 

1 Improve mental alertness, focus, and physical endurance

2 Be smoother than other stimulants like caffeine

3 My dose was 18 mg intranasally, and I have used it about 4 times over the course of about a month. 

The main thing I noticed was increased awareness of my heartbeat; it wasn’t faster but it was more noticeable. The sensation was brief and lasted under one hour, and I experienced mild changes in focus and motivation (which could be placebo). 

Overall for me, it was a short-lived physical sensation with mild cognitive effects. I will stay using caffeine, as I feel like I get more well-rounded effects from it.