Try cutting the pill in half and if that works great for you, then try cutting it down again to 5 mg.
It also gave me a runny nose everytime, the blood pressure thing did not show up till about 6 months into it. I am fit, exercise 5 days a week and take very little caffiene. So I know it was that. It lasts in your system for about 4 hours and will start working in about 15 minutes or so, but don't eat high fat foods right before (within 2 hours) or the fat can absorb the medicine. Miracle pills....
I am going to start taking them on and off to help cement my gains.