How quickly you’ll feel the effects of THC depend on how you’re consuming it, how it was processed, and your metabolism. You can expect to start feeling the effects of nano-emulsified or fast-acting THC, like clr!ty, in just 15 minutes, or with edibles, it could take up to an hour.The effects may wear off quickly (think an hour or two) or linger quite a bit longer, depending again on your dose, tolerance, and metabolism.