1998 I'm pretty sure it's klonopin. I'd recommend you to stop it. I know how good it is for HPPD but after seeing what LSD could cause to you and considering everything we know about benzos, cognitive deficit, etc, do you really trust it for the long term?
I, too, since HPPD, feel considerably less energetic. But I realized it comes from my depression. When I get out to do a physical activity I can perform even better than before. That's why I love caffeine. It does increase my visuals, but it boosts my motivation, mood and makes my mind more clear. A good tradeoff. The opposite of klonopin. It's the reason you are not seeing me around so often anymore.
Anyway, do you workout? Do you eat well? Do you still do exercises often?