Cannabis is not a good option for managing high blood pressure. n Some of my favorite products for anxiety and tension are cannabis-infused breath mints. Many of these products come in micro-dosed levels of THC (1-3mg) and offer a quick onset time. One mint will take effect in about 30 minutes and last for approximately four hours. You can always take another mint in an hour or two if you feel you need more to help ease your tension.