There is no way to completely get rid of the high, but you can reduce the effectiveness. For example:
1. Take a nap. Sleep can help you relax if you experience unpleasant side effects such as paranoia, anxiety, headache, buzzing. Sleep also gives the body a chance to process marijuana so that you wake up more alert and refreshed. Keep in mind, however, that eating Sativa, which tends to be energizing, will prevent you from falling asleep.
2. Try CBD. Cannabidiol can have a sedative effect even though THC is active. That will help ease the high.
3. There is some evidence that certain foods can also soothe highs. For example, inhaling or chewing peppers that contain caryophyllene enhances the relaxing properties of THC. Pine nuts act similarly, triggering pinene. Be very careful, however, especially if you have a nut allergy.