If you are not noticing the same effects now, then yes, you can up it.
How long have you been taking the current dose?
If you want to up the dose, then I would add 1 pill a day at first.
For example:
1st Dose - 2 pills
2nd Dose - 1 pill
3rd Dose - 1 pill
Try that for a couple days, to gauge your reaction, then go to:
1st - 2 pills
2nd - 2 pills
3rd - 1 pill
I hesitate to up the last dose of the day, becasue it can affect sleep patterns. Esp if you are prone to sleeplessness!