Is the effect of garlic on blood pressure immediate?

I recently went for a Navy physical and I passed for everything except blood pressure which was high 142/95. Since then(about a week) I've been walking/running 4-5 miles a day. I've been told that if I took garlic tablets it would lower my BP, but I'm not sure if the effect will be immediate so I can enlist soon.|||Garlic is not an immediate solution. Before your blood pressure is taken take a couple of deep breaths and relax. Sometimes when you see the doctor you get nervous causing higher blood pressure.|||Fiber will also help, Cereal or fiber capsules not sure about how long it takes though, sry