If you consume too much cannabis, you may experience anxiety, paranoia, or discomfort. The best thing to do is stay calm and find a comfortable place to relax. Drink water, eat a snack, and avoid consuming any more cannabis. In some cases, CBD can help counteract the effects of THC. Taking a hot shower or chewing on raw peppercorn can also help ease the effects. The sensations will wear off with time, usually within a few hours.